{"$schema":"https://verifymcp.io/schemas/trust-report.json","schemaVersion":1,"license":{"name":"CC BY-NC 4.0","url":"https://creativecommons.org/licenses/by-nc/4.0/"},"generatedAt":"2026-11-05T20:53:59.765Z","url":"https://verifymcp.io/servers/com-send16-send16/mcp","markdownUrl":"https://verifymcp.io/servers/com-send16-send16/mcp.md","server":{"slug":"com-send16-send16","name":"Send16","registryName":"com.send16/send16","description":"Email, SMS and marketing automation: campaigns, contacts, automations and stats from Claude.","registryStatus":"active","deletedAt":null,"statusMessage":null,"liveness":"live","publisher":{"class":"unknown","claimed":false}},"component":{"slug":"mcp","type":"remote","identifier":"https://mcp.send16.com","withdrawn":false,"url":"https://verifymcp.io/servers/com-send16-send16/mcp","version":"0.5.15","transport":null,"scoredAt":"2026-11-05T07:26:54.126Z"},"score":{"total":34,"tier":"low","status":"scored","weekDelta":-39,"history":[{"date":"2026-11-05","total":34},{"date":"2026-11-04","total":34},{"date":"2026-11-03","total":34},{"date":"2026-11-02","total":34},{"date":"2026-11-01","total":34},{"date":"2026-10-31","total":34},{"date":"2026-10-30","total":34},{"date":"2026-10-29","total":73},{"date":"2026-10-28","total":73}]},"categories":[{"name":"Endpoint Security","score":86,"verdict":"fail","reasons":["The endpoint's TLS certificate is valid, in date, and uses a strong key.","The endpoint enforces authorisation, advertised via RFC 9728 protected-resource metadata.","HTTPS enforcement could not be verified: the plaintext port answered with HTTP 401, which proves neither a plaintext path nor enforcement.","The HSTS (Strict-Transport-Security) header is present.","DNSSEC check failed: this domain isn't protected by DNSSEC.","The authorisation server supports Client ID Metadata Documents, the current MCP client-registration mechanism."],"codes":[{"code":"tls.valid","args":{}},{"code":"auth.rfc9728","args":{}},{"code":"https.inconclusive","args":{"reason":"plaintext_status","status":"401"}},{"code":"headers.hsts_present","args":{}},{"code":"dnssec.absent","args":{}},{"code":"auth.registration_cimd","args":{}}]},{"name":"Transport & Reachability","score":0,"verdict":"unverified","reasons":["Transport blocked by authentication: the endpoint requires auth we don't have to verify streamable-http."],"codes":[{"code":"transport.auth_gated","args":{"transport":"streamable-http"}}]},{"name":"Schema Quality & AI Usability","score":0,"verdict":"unverified","reasons":["Schema blocked by authentication: the endpoint requires auth we don't have to read it."],"codes":[{"code":"schema.auth_gated","args":{}}]},{"name":"Stability & Change Management","score":0,"verdict":"unverified","reasons":["Stability not yet verified: not enough scan history yet (needs a 30-day window)."],"codes":[{"code":"stability.insufficient_history","args":{}}]},{"name":"Tool Coverage","score":0,"verdict":"unverified","reasons":["Tool coverage blocked by authentication: the endpoint requires auth we don't have to read its tools."],"codes":[{"code":"toolquality.auth_gated","args":{}}]},{"name":"Tool Safety","score":0,"verdict":"unverified","reasons":["Tool safety blocked by authentication: the endpoint requires auth we don't have to read its tools."],"codes":[{"code":"toolsafety.auth_gated","args":{}}]},{"name":"Capabilities","score":0,"verdict":"unverified","reasons":["Capabilities blocked by authentication: the endpoint requires auth we don't have to read them."],"codes":[{"code":"cap.auth_gated","args":{}}]}],"inconclusive":["HTTPS enforcement could not be verified: the plaintext port answered with HTTP 401, which proves neither a plaintext path nor enforcement.","Transport blocked by authentication: the endpoint requires auth we don't have to verify streamable-http.","Schema blocked by authentication: the endpoint requires auth we don't have to read it.","Stability not yet verified: not enough scan history yet (needs a 30-day window).","Tool coverage blocked by authentication: the endpoint requires auth we don't have to read its tools.","Tool safety blocked by authentication: the endpoint requires auth we don't have to read its tools.","Capabilities blocked by authentication: the endpoint requires auth we don't have to read them."],"malware":[],"components":[{"slug":"mcp","type":"remote","identifier":"https://mcp.send16.com","withdrawn":false,"score":34,"current":true,"url":"https://verifymcp.io/servers/com-send16-send16/mcp","markdownUrl":"https://verifymcp.io/servers/com-send16-send16/mcp.md"}],"facts":[{"label":"Endpoint","value":"https://mcp.send16.com"},{"label":"Transports","value":"streamable-http"},{"label":"Auth","value":"required"},{"label":"Version","value":"0.5.15"}],"install":{"available":true,"bundleSha256":null},"tools":[{"name":"whoami","title":"Check account","description":"Verify the API key and return the authenticated workspace: name, plan, email quota (used/limit), and owner. Call this first to confirm the key works before sending. Pair with list_domains to see which `from` addresses are allowed.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":78},{"name":"send_email","title":"Send email","description":"Send a transactional email through Send16. Provide `html`, `text`, or both (text-only is fine for OTPs/receipts/alerts). `from_email` must belong to a domain that is verified in the workspace; call `whoami` for the account and `list_domains` to see which senders are allowed; a send from an unverified domain returns a clear error, not a silent failure. For a zero-setup first send, use from_email `onboarding@send16.com`; the sandbox sender delivers with no DNS, but only to your own account email. Before calling, confirm with the user: show them the recipients (or the recipient count), the sender and the subject, and wait for a clear yes. Send16 can refuse a send. 429 SEND_RAMP_LIMIT: new and free workspaces have hourly and daily sending limits while they build reputation; the error details give the window, the limit and how many remain. Tell the user how many can go now and that the rest can go once the window resets (or after upgrading), and do not split the send or retry in a loop to get around it. 403 SENDING_PAUSED: sending from the workspace is paused while the Send16 team reviews it. Nothing was sent. Tell the user to check the workspace owner's email or contact support, and do not retry. 422 MESSAGE_NEEDS_REVIEW: the content looked like it might be impersonating a government agency, bank, toll operator or delivery company, so it was held and not sent. Tell the user it is held for review and they can contact support if it is legitimate. Do not reword it and try again; repeated flags pause the workspace.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"from_email","type":"string","required":false,"description":"Sender email address (must be from a verified domain)"},{"name":"from_name","type":"string","required":false,"description":"Sender display name (e.g. \"Acme Co\")"},{"name":"html","type":"string","required":false,"description":"HTML body content"},{"name":"reply_to","type":"string","required":false,"description":"Reply-to email address"},{"name":"subject","type":"string","required":true,"description":"Email subject line"},{"name":"template","type":"string","required":false,"description":"Transactional template slug to use instead of inline content"},{"name":"text","type":"string","required":false,"description":"Plain text body content"},{"name":"to","type":null,"required":true,"description":"Recipient email address or array of addresses (max 50)"},{"name":"variables","type":"object","required":false,"description":"Template variables for merge tags"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":501},{"name":"send_campaign_test","title":"Send campaign test","description":"Send a test email for an existing campaign to preview how it will look in recipients' inboxes. Confirm the test address with the user first. Can be refused with 403 SENDING_PAUSED (workspace under review, nothing was sent, tell the user to contact support).","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"campaignId","type":"string","required":true,"description":"Campaign ID to send test for"},{"name":"testEmail","type":"string","required":true,"description":"Email address to send the test to"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":114},{"name":"create_campaign","title":"Create draft campaign","description":"Create a new email campaign as a draft: optionally with full HTML content and recipients (exactly ONE of audienceIds / segmentId / contactIds / tagIds / sendToAll) so it's ready to test and send. Nothing is sent until schedule_campaign.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"audienceIds","type":"array","required":false,"description":"Target these audience IDs (see list_audiences)"},{"name":"contactIds","type":"array","required":false,"description":"Target these specific contact IDs"},{"name":"fromEmail","type":"string","required":true,"description":"Sender email (must be from a verified domain)"},{"name":"fromName","type":"string","required":true,"description":"Sender display name"},{"name":"html","type":"string","required":false,"description":"Full HTML body for the email (skip to design later)"},{"name":"name","type":"string","required":true,"description":"Campaign name (internal label)"},{"name":"previewText","type":"string","required":false,"description":"Preview text shown in inbox alongside subject"},{"name":"replyTo","type":"string","required":false,"description":"Reply-to email address"},{"name":"segmentId","type":"string","required":false,"description":"Target this segment (see list_segments)"},{"name":"sendToAll","type":"boolean","required":false,"description":"Target all subscribed contacts in the workspace"},{"name":"subject","type":"string","required":true,"description":"Email subject line"},{"name":"tagIds","type":"array","required":false,"description":"Target contacts with these tag IDs"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":252},{"name":"design_email_template","title":"Design email with AI","description":"Use AI to generate a complete email HTML template based on a description. Returns ready-to-use HTML that can be sent or used in campaigns.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"brandColor","type":"string","required":false,"description":"Primary brand color as hex code (e.g. \"#4F46E5\")"},{"name":"companyName","type":"string","required":false,"description":"Company or brand name to include in the template"},{"name":"description","type":"string","required":true,"description":"Detailed description of the email content and purpose (e.g. 'Welcome email for a SaaS product with feature highlights and CTA to start trial')"},{"name":"style","type":"string","required":true,"description":"Visual style/aesthetic for the template"},{"name":"type","type":"string","required":true,"description":"Type of email template to generate"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":161},{"name":"list_campaigns","title":"List campaigns","description":"List email campaigns, newest first. Use `search` to find a past campaign the user describes vaguely ('the invite one', 'that July newsletter'); it matches name and subject case-insensitively; try distinctive words from their description and broaden if no hits.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"page","type":"integer","required":false,"description":"Page number"},{"name":"pageSize","type":"integer","required":false,"description":"Results per page (max 100)"},{"name":"search","type":"string","required":false,"description":"Case-insensitive substring match on campaign name or subject"},{"name":"status","type":"string","required":false,"description":"Filter campaigns by status"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":135},{"name":"create_contact","title":"Add contact","description":"Add a single new contact, optionally straight into audiences and/or with tags; e.g. 'add this person from my email into the newsletter list'. Contacts are subscribed by default. For more than a handful of people, use import_contacts instead.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"audienceIds","type":"array","required":false,"description":"Add the contact to these audience IDs (see list_audiences)"},{"name":"customFields","type":"object","required":false,"description":"Custom field key-value pairs"},{"name":"email","type":"string","required":true,"description":"Contact email address"},{"name":"firstName","type":"string","required":false,"description":"Contact first name"},{"name":"lastName","type":"string","required":false,"description":"Contact last name"},{"name":"tags","type":"array","required":false,"description":"Tag NAMES to assign; matched case-insensitively, created if missing"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":167},{"name":"search_contacts","title":"Search contacts","description":"Search contacts by email address or name. Returns matching contacts with their tags and subscription status.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"page","type":"integer","required":false,"description":"Page number"},{"name":"pageSize","type":"integer","required":false,"description":"Results per page (max 100)"},{"name":"query","type":"string","required":true,"description":"Search query (matches against email, first name, last name)"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":90},{"name":"list_contacts","title":"List contacts","description":"List all contacts with optional filtering by subscription status and tag. Supports pagination.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"page","type":"integer","required":false,"description":"Page number"},{"name":"pageSize","type":"integer","required":false,"description":"Results per page (max 100)"},{"name":"subscribed","type":"string","required":false,"description":"Filter by subscription status"},{"name":"tagId","type":"string","required":false,"description":"Filter by tag ID"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":91},{"name":"import_contacts","title":"Import contacts","description":"Bulk import contacts from CSV data (min column: email), optionally straight into audiences and/or with tags. This is the tool for cross-app flows; e.g. pulling people out of Gmail, a CRM, or a spreadsheet and landing them in a Send16 audience in one call. Set updateExisting for upsert semantics (safe to re-run). Requires consentConfirmed: true, so confirm with the user that everyone on the list opted in before calling.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"audienceIds","type":"array","required":false,"description":"Add all imported contacts to these audience IDs (see list_audiences / create_audience)"},{"name":"consentConfirmed","type":"boolean","required":false,"description":"Required, must be true. Set it only after the user has confirmed every person on this list opted in to hear from them. Never set it for bought, rented or scraped lists. If you haven't asked, ask firs…"},{"name":"csvData","type":"string","required":true,"description":"CSV string with headers. Required column: \"email\". Optional: \"firstName\", \"lastName\""},{"name":"tags","type":"array","required":false,"description":"Tag NAMES to apply to all imported contacts; matched case-insensitively, created if missing"},{"name":"updateExisting","type":"boolean","required":false,"description":"Whether to update contacts that already exist"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":268},{"name":"list_domains","title":"List sending domains","description":"List all sending domains configured in your Send16 workspace, including their verification status and DNS records.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":48},{"name":"check_domain_health","title":"Check domain DNS","description":"Check the DNS health of a specific domain, including DKIM, SPF, DMARC, and MX record verification status. Triggers a fresh DNS lookup.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"domainId","type":"string","required":true,"description":"Domain ID to check health for"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":75},{"name":"get_campaign_stats","title":"Get campaign stats","description":"Get detailed performance statistics for a specific campaign including open rate, click rate, bounce rate, and delivery metrics.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"campaignId","type":"string","required":true,"description":"Campaign ID to get stats for"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":66},{"name":"get_deliverability_status","title":"Get deliverability status","description":"Get your workspace's deliverability summary: sending reputation, domain authentication status, and recent bounce/complaint health. (Deliverability Hub plan feature.)","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":62},{"name":"list_automations","title":"List automations","description":"List all automations in the workspace, including draft/active/paused status and trigger types.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":50},{"name":"get_automation","title":"Get automation","description":"Get a single automation by ID, including its trigger, steps, and current status.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"automationId","type":"string","required":true,"description":"Automation ID"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":57},{"name":"enroll_in_automation","title":"Enroll contact in automation","description":"Manually enroll a contact in an active automation. The automation must be in 'active' status. Use send_event for event-driven enrollment. Confirm with the user first: the automation can start emailing the contact straight away.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"automationId","type":"string","required":true,"description":"Automation ID to enroll into"},{"name":"contactId","type":"string","required":true,"description":"Contact UUID (use search_contacts to look up by email first)"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":108},{"name":"send_event","title":"Fire contact event","description":"Fire a custom event for a contact. Automations whose trigger is `{type:'custom_event', eventName:'<name>'}` will enroll the contact and start running. Payload is exposed to condition steps as `event.<key>`. Confirm with the user first if the event could start an automation that emails the contact.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"contactEmail","type":"string","required":false,"description":"Contact email (provide either this or contactId)"},{"name":"contactId","type":"string","required":false,"description":"Contact UUID (provide either this or contactEmail)"},{"name":"name","type":"string","required":true,"description":"Event name (e.g. 'trial_started', 'order.placed')"},{"name":"occurredAt","type":"string","required":false,"description":"ISO-8601 timestamp; defaults to now"},{"name":"payload","type":"object","required":false,"description":"Arbitrary JSON metadata available to automation conditions"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":180},{"name":"list_templates","title":"List starter templates","description":"List starter-gallery email templates available to every workspace.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":39},{"name":"save_template","title":"Save template","description":"Save an email design as a reusable template in the user's Send16 workspace. Use this when the user has designed an email (for example in a Claude artifact) and wants it in Send16. Pass the complete email HTML. Send16 hosts every image (remote URLs and inline data: images), converts merge tags like {{first_name}} to Send16's format, and stores the HTML exactly as designed. For best results across Gmail, Outlook and Apple Mail the HTML should be email-safe: table-based layout around 600px wide, inline styles, PNG/JPG/GIF images in <img> tags (not SVG or CSS backgrounds), web-safe font fallbacks, and alt text on images. Returns the template id; follow up with send_template_test to send a preview.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"category","type":"string","required":false,"description":"Library category, e.g. newsletter, onboarding, announcement, ecommerce, transactional. Defaults to custom."},{"name":"convertMergeTags","type":"boolean","required":false,"description":"Convert common merge tags ({{first_name}}, *|FNAME|*) to Send16 tags (default true)"},{"name":"description","type":"string","required":false,"description":"Short description shown in the template library"},{"name":"hostImages","type":"boolean","required":false,"description":"Copy every image onto Send16 hosting so it can't break later (default true)"},{"name":"html","type":"string","required":true,"description":"The complete email HTML (a full <html> document or a body fragment)"},{"name":"mode","type":"string","required":false,"description":"hybrid (default): keep the exact HTML, convertible to editable blocks later. html: exact HTML only. blocks: convert to editable builder blocks now (lossy for complex designs)."},{"name":"name","type":"string","required":true,"description":"Template name, e.g. 'October newsletter'"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":359},{"name":"list_workspace_templates","title":"List saved templates","description":"List the templates saved in the user's own Send16 workspace (their template library, including ones saved with save_template). For the shared starter gallery use list_templates.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":62},{"name":"send_template_test","title":"Send template test","description":"Send a preview of a saved workspace template to one email address, so the user can see it in a real inbox. It arrives from noreply@send16.com with a small 'Template test preview' banner and uses sample merge values (first name 'Test'). Only send to the user's own address unless they ask otherwise. Confirm the test address with the user first. Can be refused with 403 SENDING_PAUSED (workspace under review, nothing was sent, tell the user to contact support).","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"email","type":"string","required":true,"description":"Where to send the preview"},{"name":"templateId","type":"string","required":true,"description":"Template id from save_template or list_workspace_templates"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":159},{"name":"get_template","title":"Get starter template","description":"Get a single starter template by ID, including its EmailContent JSON.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"templateId","type":"string","required":true,"description":"Template ID (slug)"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":55},{"name":"render_email_content","title":"Render email HTML","description":"Compile an EmailContent JSON object (the shape used by the Send16 builder + templates) into HTML using the platform's authoritative renderer. Returns the exact HTML the API would send. Useful for previews and post-processing.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"content","type":"object","required":true,"description":"EmailContent JSON (from get_template or the builder)"},{"name":"variables","type":"object","required":false,"description":"Variable replacements (e.g. {firstName:'Alice'})"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":108},{"name":"add_domain","title":"Add sending domain","description":"Register a new sending domain. Returns the DNS records the user must add to their DNS provider, after which they should call check_domain_health to verify.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"domain","type":"string","required":true,"description":"FQDN to register (e.g. 'mail.example.com')"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":79},{"name":"pre_send_review","title":"Review email before sending","description":"Run an AI pre-send review on an email's HTML before sending. Surfaces tone issues, broken links, missing alt text, spam triggers, and accessibility problems.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"audience","type":"string","required":false,"description":"Short description of the audience (helps tone analysis)"},{"name":"html","type":"string","required":true,"description":"Full HTML body to review"},{"name":"subject","type":"string","required":true,"description":"Email subject line"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":101},{"name":"generate_email_from_url","title":"Draft email from a web page","description":"Scrape a URL (e.g. a launch blog post or product page) and generate an email draft from its content. Returns subject, preview text, and HTML body.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"instructions","type":"string","required":false,"description":"Additional guidance; e.g. 'announcement style, focus on the new feature'"},{"name":"url","type":"string","required":true,"description":"Public URL to scrape and turn into an email"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":104},{"name":"list_messages","title":"List sent messages","description":"List messages from the unified send log (transactional + campaign). Filter by recipient, sender, status, date range, or source.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"created_after","type":"string","required":false,"description":"ISO-8601 timestamp lower bound"},{"name":"created_before","type":"string","required":false,"description":"ISO-8601 timestamp upper bound"},{"name":"from_email","type":"string","required":false,"description":"Sender email filter"},{"name":"limit","type":"integer","required":false,"description":"Page size (default 50)"},{"name":"offset","type":"integer","required":false,"description":"Page offset"},{"name":"source","type":"string","required":false,"description":"Restrict to one message source"},{"name":"status","type":"string","required":false,"description":"Delivery status filter"},{"name":"to_email","type":"string","required":false,"description":"Recipient email filter"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":153},{"name":"get_message","title":"Get message","description":"Fetch a single message with its full event timeline (created → sent → delivered → opened → clicked → ...).","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"id","type":"string","required":true,"description":"Message ID"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":60},{"name":"get_message_events","title":"Get message events","description":"Get just the delivery event timeline for a message: no body or recipient details.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"id","type":"string","required":true,"description":"Message ID"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":55},{"name":"list_convos","title":"List inbox conversations","description":"List inbox conversations. Filter by state, mailbox, label, screener status, or full-text search. Send16's unified inbox combines transactional reply threading with team-managed shared inboxes.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"label","type":"string","required":false,"description":"Filter by label slug (comma-separate for multiple)"},{"name":"limit","type":"integer","required":false,"description":"Page size (default 50)"},{"name":"mailboxId","type":"string","required":false,"description":"Filter to one mailbox"},{"name":"search","type":"string","required":false,"description":"Full-text search across subject + body"},{"name":"state","type":"string","required":false,"description":"Conversation status"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":132},{"name":"get_convo","title":"Get conversation","description":"Get a single conversation with its full thread of posts (incoming + outgoing).","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"id","type":"string","required":true,"description":"Conversation ID"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":54},{"name":"send_reply","title":"Send inbox reply","description":"Reply to an inbox conversation. The reply is sent from the original recipient address (the alias the convo arrived on) and threaded back to the contact. Show the user the reply text and get a clear yes first: it goes to a real person and cannot be unsent. Can be refused with 403 SENDING_PAUSED (workspace under review, nothing was sent, tell the user to contact support).","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"convoId","type":"string","required":true,"description":"Conversation ID"},{"name":"html","type":"string","required":false,"description":"HTML body of the reply"},{"name":"text","type":"string","required":false,"description":"Plain text body of the reply"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":145},{"name":"mark_convo_read","title":"Mark conversation read","description":"Mark a conversation as read for the current viewer.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"convoId","type":"string","required":true,"description":"Conversation ID"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":51},{"name":"update_convo","title":"Update conversation","description":"Update conversation status (open/closed/archived/snoozed) or assignee.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"assigneeId","type":"string|null","required":false,"description":"Workspace member user ID, or null to unassign"},{"name":"convoId","type":"string","required":true,"description":"Conversation ID"},{"name":"state","type":"string","required":false,"description":"New status"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":88},{"name":"add_convo_note","title":"Add internal note","description":"Add a private internal note on a conversation. Notes are visible only to workspace members.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"body","type":"string","required":true,"description":"Note body (markdown supported)"},{"name":"convoId","type":"string","required":true,"description":"Conversation ID"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":70},{"name":"screener_decide","title":"Decide screened sender","description":"Decide a pending screener conversation (first-time sender). 'allow' lets future emails through, 'reject' blocks, 'cold' marks as cold outreach.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"convoId","type":"string","required":true,"description":"Conversation ID"},{"name":"decision","type":"string","required":true,"description":"Screener decision"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":83},{"name":"list_inbox_counts","title":"Get inbox counts","description":"Get unread/total counts per category and label for the inbox sidebar (newsletter, transactional, marketing, calendar, social, cold).","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":57},{"name":"list_topics","title":"List subscription topics","description":"List subscription topics. Topics are granular categories contacts can subscribe to (e.g. 'product-updates', 'weekly-digest'). Campaigns and automations can be gated to subscribers of a specific topic.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":70},{"name":"create_topic","title":"Create subscription topic","description":"Create a new subscription topic. Contacts opt into topics individually via the preference center.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"description","type":"string","required":false,"description":"Description shown in the preference center"},{"name":"isDefault","type":"boolean","required":false,"description":"Auto-subscribe new contacts to this topic"},{"name":"name","type":"string","required":true,"description":"Display name shown to contacts"},{"name":"slug","type":"string","required":false,"description":"URL-safe slug (auto-derived from name if omitted)"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":103},{"name":"update_topic","title":"Update subscription topic","description":"Update a subscription topic (name, description, default).","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"description","type":"string","required":false,"description":null},{"name":"isDefault","type":"boolean","required":false,"description":null},{"name":"name","type":"string","required":false,"description":null},{"name":"topicId","type":"string","required":true,"description":"Topic ID"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":72},{"name":"delete_topic","title":"Delete subscription topic","description":"Delete a subscription topic. All subscribers will be detached.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"topicId","type":"string","required":true,"description":"Topic ID"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":50},{"name":"list_actions","title":"List actions","description":"List Actions. Actions fire a transactional template when a custom event arrives: simple 'event_name → template' pairings, lighter than full automations.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":59},{"name":"get_action","title":"Get action","description":"Get a single Action with its trigger config and template binding.","inputs":[{"name":"actionId","type":"string","required":true,"description":"Action ID"},{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":51},{"name":"create_action","title":"Create action","description":"Create an Action that maps an event name to a transactional template. Each matching event sends one email to the contact.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"delaySeconds","type":"integer","required":false,"description":"Delay before sending"},{"name":"enabled","type":"boolean","required":false,"description":null},{"name":"eventName","type":"string","required":true,"description":"Event name to match (e.g. 'order.placed')"},{"name":"name","type":"string","required":true,"description":"Display name"},{"name":"sendOnce","type":"boolean","required":false,"description":"Only send once per contact regardless of how many times the event fires"},{"name":"templateSlug","type":"string","required":true,"description":"Transactional template slug to send"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":134},{"name":"update_action","title":"Update action","description":"Update an Action (toggle enabled, change template, change event name).","inputs":[{"name":"actionId","type":"string","required":true,"description":"Action ID"},{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"delaySeconds","type":"integer","required":false,"description":null},{"name":"enabled","type":"boolean","required":false,"description":null},{"name":"eventName","type":"string","required":false,"description":null},{"name":"name","type":"string","required":false,"description":null},{"name":"sendOnce","type":"boolean","required":false,"description":null},{"name":"templateSlug","type":"string","required":false,"description":null}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":99},{"name":"delete_action","title":"Delete action","description":"Delete an Action.","inputs":[{"name":"actionId","type":"string","required":true,"description":"Action ID"},{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":43},{"name":"list_audiences","title":"List audiences","description":"List audiences (lists). An audience is a static, manually-managed group of contacts.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":48},{"name":"create_audience","title":"Create audience","description":"Create a new audience.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"description","type":"string","required":false,"description":null},{"name":"name","type":"string","required":true,"description":null}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":49},{"name":"add_contacts_to_audience","title":"Add contacts to audience","description":"Add contacts (by ID) to an audience.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"audienceId","type":"string","required":true,"description":"Audience ID"},{"name":"contactIds","type":"array","required":true,"description":"Contact IDs to add"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":64},{"name":"remove_contact_from_audience","title":"Remove contact from audience","description":"Remove a contact from an audience.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"audienceId","type":"string","required":true,"description":"Audience ID"},{"name":"contactId","type":"string","required":true,"description":"Contact ID"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":59},{"name":"delete_audience","title":"Delete audience","description":"Delete an audience (list). Contacts are not deleted; only the list and its memberships are removed.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"audienceId","type":"string","required":true,"description":"Audience ID"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":60},{"name":"list_segments","title":"List segments","description":"List dynamic segments. Segments compute their members from a filter expression at send time.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":46},{"name":"preview_segment","title":"Preview segment","description":"Preview the contacts that match a segment without sending.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"segmentId","type":"string","required":true,"description":"Segment ID"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":49},{"name":"list_events","title":"List events","description":"List the workspace's events (meetups, workshops, conferences) with registered, attended and no-show counts and each event's public registration page.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"scope","type":"string","required":false,"description":"Which events (default all)"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":70},{"name":"get_event_insights","title":"Event attendance insights","description":"Who registered and who came for one event: counts, no-show rate, where people came from (city and state), first-timers vs returning, organisations and registrations over time. Without an eventId, returns insights across every event: regulars and their attendance streaks, cohort retention and the regions growing fastest.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"eventId","type":"string","required":false,"description":"Event ID (see list_events). Leave out for insights across all events."}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":116},{"name":"list_event_registrations","title":"List event registrations","description":"List the people registered for an event, with status (registered, waitlisted, attended, no_show, cancelled), company, city and check-in time.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"eventId","type":"string","required":true,"description":"Event ID (see list_events)"},{"name":"q","type":"string","required":false,"description":"Search name, email or company"},{"name":"status","type":"string","required":false,"description":null}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":97},{"name":"register_for_event","title":"Register someone for an event","description":"Register someone for an event. They get the event's confirmation email with their QR ticket unless the organiser switched it off, so confirm the person and the event with the user first. Registering doesn't subscribe them to marketing unless marketingOptIn is true because they asked.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"city","type":"string","required":false,"description":null},{"name":"company","type":"string","required":false,"description":null},{"name":"email","type":"string","required":true,"description":null},{"name":"eventId","type":"string","required":true,"description":"Event ID (see list_events)"},{"name":"firstName","type":"string","required":false,"description":null},{"name":"lastName","type":"string","required":false,"description":null},{"name":"marketingOptIn","type":"boolean","required":false,"description":"Only when the person asked to hear about future events"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":153},{"name":"check_in_attendee","title":"Check in an attendee","description":"Check a registrant in at the door (or undo it). Use the registration ID from list_event_registrations.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"eventId","type":"string","required":true,"description":"Event ID"},{"name":"registrationId","type":"string","required":true,"description":"Registration ID"},{"name":"undo","type":"boolean","required":false,"description":"Undo a check-in made by mistake"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":89},{"name":"update_contact","title":"Update contact","description":"Update a contact's profile fields, custom fields, or subscription state.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"contactId","type":"string","required":true,"description":"Contact ID"},{"name":"customFields","type":"object","required":false,"description":null},{"name":"firstName","type":"string","required":false,"description":null},{"name":"lastName","type":"string","required":false,"description":null},{"name":"subscribed","type":"boolean","required":false,"description":null}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":84},{"name":"delete_contact","title":"Delete contact","description":"Delete a contact and all associated events. Irreversible.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"contactId","type":"string","required":true,"description":"Contact ID"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":51},{"name":"get_contact_timeline","title":"Get contact timeline","description":"Get a contact's full activity timeline: emails received, events fired, opens, clicks, automation enrollments, topic changes.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"contactId","type":"string","required":true,"description":"Contact ID"},{"name":"cursor","type":"string","required":false,"description":"Pagination cursor"},{"name":"limit","type":"integer","required":false,"description":"Page size"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":84},{"name":"get_contact_health_score","title":"Get contact health score","description":"Get a contact's 0-100 health score based on recent engagement (opens, clicks, replies).","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"contactId","type":"string","required":true,"description":"Contact ID"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":62},{"name":"send_broadcast","title":"Send broadcast","description":"One-shot broadcast: create a campaign and immediately schedule it to send, in a single call. Pass either an audienceId, segmentId, topicId, or fully-qualified filter. Provide html OR templateSlug. Before calling, confirm with the user: show them the recipients (or the recipient count), the sender and the subject, and wait for a clear yes. Send16 can refuse a send. 429 SEND_RAMP_LIMIT: new and free workspaces have hourly and daily sending limits while they build reputation; the error details give the window, the limit and how many remain. Tell the user how many can go now and that the rest can go once the window resets (or after upgrading), and do not split the send or retry in a loop to get around it. 403 SENDING_PAUSED: sending from the workspace is paused while the Send16 team reviews it. Nothing was sent. Tell the user to check the workspace owner's email or contact support, and do not retry. 422 MESSAGE_NEEDS_REVIEW: the content looked like it might be impersonating a government agency, bank, toll operator or delivery company, so it was held and not sent. Tell the user it is held for review and they can contact support if it is legitimate. Do not reword it and try again; repeated flags pause the workspace.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"audienceId","type":"string","required":false,"description":"Send to all contacts in this audience"},{"name":"fromEmail","type":"string","required":true,"description":"Must be a verified domain"},{"name":"fromName","type":"string","required":true,"description":null},{"name":"html","type":"string","required":false,"description":"Full HTML body (one of html/templateSlug required)"},{"name":"name","type":"string","required":true,"description":"Internal campaign name"},{"name":"previewText","type":"string","required":false,"description":null},{"name":"replyTo","type":"string","required":false,"description":null},{"name":"scheduleAt","type":"string","required":false,"description":"ISO-8601 future datetime; omit to send immediately"},{"name":"segmentId","type":"string","required":false,"description":"Send to all contacts matching this segment"},{"name":"subject","type":"string","required":true,"description":null},{"name":"templateSlug","type":"string","required":false,"description":"Workspace template slug to use"},{"name":"topicId","type":"string","required":false,"description":"Send to all subscribers of this topic"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":447},{"name":"schedule_campaign","title":"Schedule or send campaign","description":"Schedule (or send immediately) an existing draft campaign to an audience/segment/topic. Before calling, confirm with the user: show them the recipients (or the recipient count), the sender and the subject, and wait for a clear yes. Send16 can refuse a send. 429 SEND_RAMP_LIMIT: new and free workspaces have hourly and daily sending limits while they build reputation; the error details give the window, the limit and how many remain. Tell the user how many can go now and that the rest can go once the window resets (or after upgrading), and do not split the send or retry in a loop to get around it. 403 SENDING_PAUSED: sending from the workspace is paused while the Send16 team reviews it. Nothing was sent. Tell the user to check the workspace owner's email or contact support, and do not retry. 422 MESSAGE_NEEDS_REVIEW: the content looked like it might be impersonating a government agency, bank, toll operator or delivery company, so it was held and not sent. Tell the user it is held for review and they can contact support if it is legitimate. Do not reword it and try again; repeated flags pause the workspace.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"audienceId","type":"string","required":false,"description":null},{"name":"campaignId","type":"string","required":true,"description":"Campaign ID"},{"name":"scheduleAt","type":"string","required":false,"description":"ISO-8601 future datetime; omit to send immediately"},{"name":"segmentId","type":"string","required":false,"description":null},{"name":"topicId","type":"string","required":false,"description":null}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":326},{"name":"update_campaign","title":"Update draft campaign","description":"Update a draft campaign: name, subject, preview text, sender info, HTML content, and/or recipients. Retarget with exactly ONE of audienceIds / segmentId / contactIds / tagIds / sendToAll, then verify with preview_campaign_recipients before sending. Only drafts can be edited.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"audienceIds","type":"array","required":false,"description":"Retarget to these audience IDs (see list_audiences). Sets recipient type 'lists'."},{"name":"campaignId","type":"string","required":true,"description":"Campaign ID"},{"name":"contactIds","type":"array","required":false,"description":"Retarget to these specific contact IDs"},{"name":"fromEmail","type":"string","required":false,"description":null},{"name":"fromName","type":"string","required":false,"description":null},{"name":"html","type":"string","required":false,"description":null},{"name":"name","type":"string","required":false,"description":"Campaign name (internal label)"},{"name":"previewText","type":"string","required":false,"description":null},{"name":"replyTo","type":"string","required":false,"description":null},{"name":"segmentId","type":"string","required":false,"description":"Retarget to this segment (see list_segments)"},{"name":"sendToAll","type":"boolean","required":false,"description":"Retarget to all subscribed contacts in the workspace"},{"name":"subject","type":"string","required":false,"description":null},{"name":"tagIds","type":"array","required":false,"description":"Retarget to contacts with these tag IDs"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":250},{"name":"pause_campaign","title":"Pause campaign","description":"Pause a sending campaign. Already-sent messages are unaffected; remaining sends halt.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"campaignId","type":"string","required":true,"description":"Campaign ID"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":55},{"name":"resume_campaign","title":"Resume campaign","description":"Resume a paused campaign. Confirm with the user first: the remaining recipients start receiving the campaign straight away. The sending limits and pauses described on schedule_campaign still apply.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"campaignId","type":"string","required":true,"description":"Campaign ID"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":72},{"name":"duplicate_campaign","title":"Duplicate campaign","description":"Duplicate a campaign (template, content, and settings) as a new draft; works on sent campaigns too, so this is the way to re-use a past campaign's design. Optionally rename and retarget in the same call (exactly ONE of audienceIds / segmentId / contactIds / tagIds / sendToAll). NOTE: without retargeting, the copy keeps the ORIGINAL campaign's recipients.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"audienceIds","type":"array","required":false,"description":"Retarget the new draft to these audience IDs (see list_audiences)"},{"name":"campaignId","type":"string","required":true,"description":"Campaign ID to duplicate"},{"name":"contactIds","type":"array","required":false,"description":"Retarget the new draft to these contact IDs"},{"name":"name","type":"string","required":false,"description":"Name for the new draft (default: original name + ' (Copy)')"},{"name":"segmentId","type":"string","required":false,"description":"Retarget the new draft to this segment"},{"name":"sendToAll","type":"boolean","required":false,"description":"Retarget the new draft to all subscribed contacts"},{"name":"tagIds","type":"array","required":false,"description":"Retarget the new draft to contacts with these tag IDs"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":238},{"name":"delete_campaign","title":"Delete draft campaign","description":"Delete a draft campaign. Sent campaigns cannot be deleted (only archived).","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"campaignId","type":"string","required":true,"description":"Campaign ID"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":53},{"name":"preview_campaign_recipients","title":"Preview campaign recipients","description":"Preview the recipient set for a campaign before sending. Returns count + sample list.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"campaignId","type":"string","required":true,"description":"Campaign ID"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":58},{"name":"activate_automation","title":"Activate automation","description":"Activate an automation. New events matching its triggers will start enrolling contacts. Confirm with the user first: once active it can start emailing contacts straight away.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"automationId","type":"string","required":true,"description":"Automation ID"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":70},{"name":"pause_automation","title":"Pause automation","description":"Pause an automation. Existing enrollments freeze in place; no new contacts enroll.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"automationId","type":"string","required":true,"description":"Automation ID"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":56},{"name":"get_automation_stats","title":"Get automation stats","description":"Get aggregate analytics for an automation: total enrollments, completed, exited, open/click rates per step.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"automationId","type":"string","required":true,"description":"Automation ID"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":63},{"name":"list_automation_enrollments","title":"List automation enrollments","description":"List active and historical enrollments for an automation.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"automationId","type":"string","required":true,"description":"Automation ID"},{"name":"page","type":"integer","required":false,"description":"Page number"},{"name":"pageSize","type":"integer","required":false,"description":"Results per page (max 100)"},{"name":"state","type":"string","required":false,"description":null}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":84},{"name":"list_workspaces","title":"List workspaces","description":"List workspaces the authenticated user has access to (owner or member).","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":44},{"name":"get_workspace","title":"Get workspace","description":"Get the current workspace (the one the API key belongs to).","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":42},{"name":"get_brand","title":"Get brand settings","description":"Get the workspace's brand settings: colors, logo, fonts, and the DESIGN.md spec injected into AI generation prompts.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"}],"outputs":[],"hasOutputSchema":false,"hasExamples":false,"tokenEstimate":53},{"name":"update_brand","title":"Update brand settings","description":"Update workspace brand settings. The designSpec field is a Markdown DESIGN.md document fed into AI generation system prompts; use it to encode voice, do/don't lists, and visual rules. companyName/websiteUrl/companyAddress also fill the matching merge tags in templates.","inputs":[{"name":"apiKey","type":"string","required":false,"description":"Send16 API key (overrides SEND16_API_KEY env var)"},{"name":"companyAddress","type":"string","required":false,"description":"Physical postal address. 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0.03)","materiality":"functional","direction":"improvement","scoreDelta":null,"occurredOn":"2026-10-29","url":"https://verifymcp.io/servers/com-send16-send16/mcp#chg-chg_01a18690-97ba-7058-918e-61390fc37aa1"},{"id":"chg_01a180bd-a877-7b2e-8d25-adcde2742f85","kind":"score.first_scored","summary":"First indexed and scored","materiality":"functional","direction":"neutral","scoreDelta":null,"occurredOn":"2026-10-28","url":"https://verifymcp.io/servers/com-send16-send16/mcp#chg-chg_01a180bd-a877-7b2e-8d25-adcde2742f85"}],"truncated":false,"feedUrl":"https://verifymcp.io/servers/com-send16-send16/mcp/changelog.json"},"links":{"html":"https://verifymcp.io/servers/com-send16-send16/mcp","markdown":"https://verifymcp.io/servers/com-send16-send16/mcp.md","changelogJson":"https://verifymcp.io/servers/com-send16-send16/mcp/changelog.json","changelogRss":"https://verifymcp.io/servers/com-send16-send16/mcp.xml","external":[{"label":"Remote 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