SendGrid MCP by usefulapi
REMOTE · SENDGRID.USEFULAPI.IO
Send email and read templates, marketing contacts, lists, stats, bounces and unsubscribes.
Available components
Last scanned (3 hours ago)
Scores higher than 4% of remote servers
Reachable. Last reached 5 Nov 2026.
Category Marketing and SEO
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security46
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not yet verified: we couldn't confirm whether this endpoint requires it. View diagnostics → Unverified
- HTTPS enforcement could not be verified: the plaintext port redirected somewhere other than https, so enforcement is unproven. View diagnostics → Unverified
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability0
- Transport check failed: declared streamable-http, but the endpoint redirected instead of responding directly. See how to fix → View diagnostics → Fail
Schema Quality & AI Usability0
- Schema not yet verified: we couldn't read the endpoint's schema, or could read only part of its tool list.Unverified
Stability & Change Management0
- Stability not yet verified: not enough scan history yet (needs a 30-day window).Unverified
Tool Coverage0
- Tool coverage not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.Unverified
Tool Safety0
- Tool safety not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.Unverified
Capabilities0
- Capabilities not yet verified: we couldn't read the endpoint's capabilities.Unverified
Unverified: 5 categories
Categories scored 0 because we could not verify them: authentication we do not have, an unreachable endpoint, or not enough scan history. We only credit what we can confirm.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 2 Nov 26 −62
- Endpoint reachability: reachable → not serving MCP ▼ security
- Stability: pass → unverified ▼ security
- Tool safety: pass → unverified ▼ security
- Authorization: pass → unverified ▼ security
- Schema quality: 100 → unverified ▼ functional
- Capabilities: pass → unverified ▼ functional
- Tool coverage: 100 → unverified ▼ functional
- 31 Oct 26 +3
- Authorization: partial → pass ▲ security
- MCP protocol: fail → pass ▲ functional
- New prompt “add_or_update_marketing_contacts” functional
- New prompt “check_delivery_bounce_and_spam_numbers_for_a_period” functional
- New prompt “check_our_marketing_contacts_and_lists” functional
- New prompt “list_bounced_and_unsubscribed_addresses” functional
- New prompt “review_our_email_templates” functional
- New prompt “send_an_email_or_a_template_email” functional
- MCP protocol version: 2025-06-18 → 2025-11-25 functional
- Server version: 1.31.0 → 1.33.0 functional
- Server version: 1.30.0 → 1.31.0 functional
- Server version: 1.29.2 → 1.30.0 functional
- 30 Oct 26 0
- Server version: 1.29.1 → 1.29.2 functional
- Server version: 1.29.0 → 1.29.1 functional
- 29 Oct 26 0
- Server version: 1.28.0 → 1.29.0 functional
- Server version: 1.27.0 → 1.28.0 functional
- 28 Oct 26 +1
- Stability: 0.97 → pass security
- Server version: 1.25.0 → 1.27.0 functional
- 27 Oct 26 0
- Server version: 1.24.0 → 1.25.0 functional
- 26 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 90 to 93. That category is still filling its 30-day observation window: 27 days of observed history at the previous scan, 28 at this one. The score rises as the window fills, whether or not the server changes.
- 25 Oct 26 0
- Server version: 1.23.0 → 1.24.0 functional
- Server version: 1.22.0 → 1.23.0 functional
- Server version: 1.21.3 → 1.22.0 functional
- Server version: 1.21.0 → 1.21.3 functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 5 Nov 2026 · Probed https://sendgrid.usefulapi.io/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=usefulapi.io | CN=WE1,O=Google Trust Services,C=US | 13 Sept 2026 | 12 Dec 2026 | ECDSA 256 | ECDSA-SHA256 | d9be3287b0fde9630e825ba1f79bff3f |
| SANs: usefulapi.io, *.usefulapi.io | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of sendgrid.usefulapi.io. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| io. | present | 38690 | 8 | Verified |
| usefulapi.io. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication Inconclusive
We could not reach the endpoint well enough to judge its authorisation posture.
| Result | Inconclusive |
|---|---|
| HTTP status | 302 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://sendgrid.usefulapi.io/mcp | Redirected | 302 | https://usefulapi.io/sendgrid/ |
| http (plaintext) | http://sendgrid.usefulapi.io/mcp | Inconclusive | 302 | http://sendgrid.usefulapi.io/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
sendgrid_add_or_update_contacts Add or update marketing contacts ~101
UPSERTS marketing contacts (creates new ones, updates existing ones by email) and optionally adds them to lists. This is an ASYNC job — returns { job_id } you can poll. SendGrid: PUT /v3/marketing/contacts.
| Name | Type | Req | Description |
|---|---|---|---|
| contacts | array | yes | Contacts to add or update (each needs an `email`; custom fields pass through). |
| list_ids | array | – | List ids to add these contacts to. |
No output schema declared.
No examples provided.
sendgrid_get_contact_count Get contact count ~46
Get the total number of Marketing Campaigns contacts on your account. Returns { contact_count, billable_count }. SendGrid: GET /v3/marketing/contacts/count.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
sendgrid_get_stats Get email stats ~137
Get global email statistics over a date range (delivered, opens, clicks, bounces, spam reports, etc.). Returns an array of { date, stats: [{ metrics: {...} }] }. SendGrid: GET /v3/stats.
| Name | Type | Req | Description |
|---|---|---|---|
| aggregated_by | string | – | How to group the returned statistics. |
| end_date | string | – | End date in YYYY-MM-DD format (defaults to today). |
| limit | integer | – | Number of results to return. |
| offset | integer | – | Number of results to skip (for pagination). |
| start_date | string | yes | Start date in YYYY-MM-DD format (required). |
No output schema declared.
No examples provided.
sendgrid_get_template Get email template ~59
Get a single transactional email template by id, including its versions (subject + content). SendGrid: GET /v3/templates/{template_id}.
| Name | Type | Req | Description |
|---|---|---|---|
| template_id | string | yes | The template id (dynamic template ids start with "d-"). |
No output schema declared.
No examples provided.
sendgrid_list_bounces List bounces ~134
List bounced email addresses (the bounce suppression list). Returns an array of { created, email, reason, status }. SendGrid: GET /v3/suppression/bounces.
| Name | Type | Req | Description |
|---|---|---|---|
| string | – | Filter to a specific bounced email address. | |
| end_time | integer | – | End of the time range, as a Unix timestamp (seconds). |
| limit | integer | – | Number of bounces to return (1–500). |
| offset | integer | – | Number of bounces to skip (for pagination). |
| start_time | integer | – | Start of the time range, as a Unix timestamp (seconds). |
No output schema declared.
No examples provided.
sendgrid_list_global_unsubscribes List global unsubscribes ~118
List globally-unsubscribed email addresses (the global suppression list). Returns an array of { created, email }. SendGrid: GET /v3/suppression/unsubscribes.
| Name | Type | Req | Description |
|---|---|---|---|
| end_time | integer | – | End of the time range, as a Unix timestamp (seconds). |
| limit | integer | – | Number of records to return. |
| offset | integer | – | Number of records to skip (for pagination). |
| start_time | integer | – | Start of the time range, as a Unix timestamp (seconds). |
No output schema declared.
No examples provided.
sendgrid_list_marketing_lists List marketing lists ~91
List your Marketing Campaigns contact lists, each with its id, name, and contact_count. Returns { result: [...], _metadata }. SendGrid: GET /v3/marketing/lists.
| Name | Type | Req | Description |
|---|---|---|---|
| page_size | integer | – | Number of lists per page (1–1000, default 100). |
| page_token | string | – | Pagination token from a previous response's _metadata. |
No output schema declared.
No examples provided.
sendgrid_list_templates List email templates ~106
List your transactional email templates (Dynamic and/or Legacy). Returns { result: [...], _metadata } — use _metadata.next / page_token to paginate. SendGrid: GET /v3/templates.
| Name | Type | Req | Description |
|---|---|---|---|
| generations | string | – | Which template generation(s) to return (default: dynamic). |
| page_size | integer | – | Number of templates per page (1–200, default 50). |
| page_token | string | – | Pagination token from a previous response's _metadata. |
No output schema declared.
No examples provided.
sendgrid_ping Ping (health check) ~38
Health check — verifies the API key works and returns the scopes (permissions) granted to it. SendGrid: GET /v3/scopes.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
sendgrid_search_contacts_by_email Search contacts by email ~78
Look up marketing contacts by exact email address (a read-only lookup — mutates nothing). Returns { result: { "<email>": { contact: {...} } } }. SendGrid: POST /v3/marketing/contacts/search/emails.
| Name | Type | Req | Description |
|---|---|---|---|
| emails | array | yes | One or more exact email addresses to look up. |
No output schema declared.
No examples provided.
sendgrid_send_mail Send email ~265
SENDS A REAL EMAIL immediately via SendGrid. Provide `from_email` and one or more `to` recipients, plus EITHER a subject + content OR a `template_id` (dynamic template ids start with "d-", pass values via dynamic_template_data). Returns { status: "accepted", message_id }. SendGrid: POST /v3/mail/send.
| Name | Type | Req | Description |
|---|---|---|---|
| bcc | array | – | BCC recipient email addresses. |
| cc | array | – | CC recipient email addresses. |
| content | string | – | The email body. Required unless template_id is provided. |
| content_type | string | – | MIME type of the body content (default text/html). |
| dynamic_template_data | object | – | Key/value data merged into a dynamic template's handlebars variables. |
| from_email | string | yes | Sender email address (must be a verified sender/domain). |
| from_name | string | – | Sender display name. |
| reply_to | string | – | Reply-To email address. |
| subject | string | – | Email subject line. Required unless a template_id supplies it. |
| template_id | string | – | A template id to render (dynamic template ids start with "d-"). When set, `content` is omitted. |
| to | array | yes | One or more recipient email addresses. |
No output schema declared.
No examples provided.
How do I install the SendGrid MCP by usefulapi server?
SendGrid MCP by usefulapi is a hosted endpoint at https://sendgrid.usefulapi.io/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · sendgrid.usefulapi.io
claude mcp add --transport http io-usefulapi-sendgrid 'https://sendgrid.usefulapi.io/mcp'
What is the SendGrid MCP by usefulapi server?
SendGrid MCP by usefulapi is listed in the public MCP registry as io.usefulapi/sendgrid. Send email and read templates, marketing contacts, lists, stats, bounces and unsubscribes. This page covers its hosted endpoint (https://sendgrid.usefulapi.io/mcp).
Is the SendGrid MCP by usefulapi server safe to use?
SendGrid MCP by usefulapi scores 18 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the SendGrid MCP by usefulapi server expose?
SendGrid MCP by usefulapi exposes 11 tools: sendgrid_ping, sendgrid_list_templates, sendgrid_get_template, sendgrid_list_marketing_lists, sendgrid_get_contact_count, and 6 more. Their descriptions and schemas cost roughly 1,173 tokens of context every time the server is loaded.
Does the SendGrid MCP by usefulapi server require authentication?
Its publisher declares no required credentials for SendGrid MCP by usefulapi. We have not been able to confirm that against the live endpoint, and a server can require authorisation without declaring it here.
Is the SendGrid MCP by usefulapi server still maintained?
SendGrid MCP by usefulapi is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.