Skip to content
verify mcp Beta VerifyMCP is currently in beta. If you notice any issues, get in touch and we’ll put it right.

Vision6 MCP by usefulapi

REMOTE · VISION6.USEFULAPI.IO

Read Vision6 lists, contacts, messages and reports; update contacts; send transactional email/SMS.

60 Trust /100

Last scanned (5 hours ago)

Scores higher than 46% of remote servers

Reachable. Last reached 25 Oct 2026.

Category Marketing and SEO

Trust breakdown (7 categories)

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 Security78
Transport & Reachability0
Schema Quality & AI Usability74
  • 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
  • AI-judged instruction clarity (good).Pass
  • Context-footprint check failed: tool/resource definitions use about 3892 tokens (~169/item across 23 items; 23 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
  • Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management3
  • Stability observed for 1 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage90
  • 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
  • 71% of tool parameters carry a description.Partial
Tool Safety92
  • No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
  • 2 of 3 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "vision6_list_reports" implies "send" and declares readOnlyHint instead, contradicting what its own name says it does. See how to fix → Partial
  • An AI judge read all 24 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities60
  • Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28. See how to fix → Fail
Changelog

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.

  • 25 Oct 26 0
    • Stability: unverified → 0.03 ▲ functional
    • Server version: 1.0.0 → 1.0.3 functional
  • 24 Oct 26 60

    First indexed and scored.

Diagnostics

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 25 Oct 2026 · Probed https://vision6.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 vision6.usefulapi.io. — Not signed

Zone DS Keys Algorithms Outcome
. trust_anchor 20326, 38696 8, 8 Verified
io. present 38690, 57355 8, 8 Verified
usefulapi.io. absent Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation
Authentication Enforced and verified

The endpoint asked for a token and published valid RFC 9728 metadata describing how to get one.

Result Enforced and verified
Enforced On tool calls
HTTP status 302

WWW-Authenticate challenge Bearer realm="OAuth", resource_metadata="https://vision6.usefulapi.io/.well-known/oauth-protected-resource/mcp"

Bearer realm="OAuth", resource_metadata="https://vision6.usefulapi.io/.well-known/oauth-protected-resource/mcp"

Protected resource metadata

Document https://vision6.usefulapi.io/.well-known/oauth-protected-resource/mcp
Retrieved Yes
Resource https://vision6.usefulapi.io/mcp
Authorisation server https://vision6.usefulapi.io

Background: How OAuth 2.1 works in the 2026 MCP spec →

Transports 2 probes
Transport URL Outcome Status Location
streamable-http https://vision6.usefulapi.io/mcp Redirected 302 https://usefulapi.io/vision6/
http (plaintext) http://vision6.usefulapi.io/mcp Inconclusive 302 http://vision6.usefulapi.io/mcp
MCP tools · 23 exposed · ~3,633 tokens

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 →

Tool Tokens
vision6_add_contacts ~127

WRITE: add up to 200 contacts to a list in one request (faster than one by one). Each needs an email and/or mobile. Vision6 returns no contact data (HTTP 204), so use vision6_list_contacts to read them back. May trigger automations. POST /lists/{list_id}/contacts.

NameTypeReqDescription
contactsarrayyes–
list_idintegeryes–
remove_unsubscribersstring–Skip addresses that are on the unsubscribers list: any (account-wide), list (this list), none (default: create everyone).

No output schema declared.

No examples provided.

vision6_create_contact ~284

WRITE: add one contact to a list (needs an email and/or mobile that matches a field of the list). May trigger the list's 'contact created' automations and notification emails. Returns the new contact. POST /lists/{list_id}/contacts.

NameTypeReqDescription
double_opt_inboolean–true marks the contact as already confirmed (sets the double opt-in time to now). It cannot be reset to false afterwards.
emailstring–Email address (the list must have an Email field).
email_subscribedboolean–Whether the email address is subscribed to receive messages.
fieldsobject–Custom list field values, keyed by the lowercase key of the field name (underscores for spaces/dashes, e.g. first_name). Use vision6_list_list_fields to see the list's fields.
is_activeboolean–The contact's active status.
list_idintegeryes–
mobilestring–Mobile number in international format without + or spaces (Australia: 61400000009). The list must have a Mobile field.
mobile_subscribedboolean–Whether the mobile number is subscribed to receive messages.
remove_unsubscribersstring–Skip addresses that are on the unsubscribers list: any (account-wide), list (this list), none (default: create everyone).

No output schema declared.

No examples provided.

vision6_create_list ~154

WRITE: create a new, empty contact list inside a list folder (see vision6_list_folders with type list). Returns the new list. POST /lists.

NameTypeReqDescription
allow_send_to_duplicatesboolean–Allow sends to duplicate email or mobile addresses.
folder_idintegeryesId of the list folder to create the list in.
is_gdpr_compliantboolean––
namestringyes–
on_register_addressarray–Email addresses to notify when a contact is added.
on_unsubscribe_addressarray–Email addresses to notify when a contact unsubscribes.
on_update_addressarray–Email addresses to notify when a contact is updated.

No output schema declared.

No examples provided.

vision6_create_message ~370

WRITE: save a new email or SMS message in Vision6. This only stores the message; it is NOT sent (use the Vision6 app to send a campaign, or vision6_send_transactional for a one-off send). Email needs email_type, subject and matching body fields (plain: content_text; html: content_html; plain-html: both; raw_html: content_html or content_html_raw). SMS needs content_sms. The drag-and-drop builder is not supported. POST /messages.

NameTypeReqDescription
content_htmlstring–HTML body (email types html and plain-html; raw_html accepts it or content_html_raw).
content_html_rawstring–Raw HTML document (email type raw_html).
content_smsstring–SMS text (required for an sms message; keep it near 500 characters).
content_textstring–Plain-text body (email types plain and plain-html).
email_typestring–Required for email.
folder_idinteger–Message folder id (see vision6_list_folders with type message). Omit to use the account's first message folder.
from_addressstring–Sender address. For email it must be a verified address/domain in the account. Omit to use the account's saved default (see vision6_get_message_sender_defaults).
from_namestring––
is_responsiveboolean–Responsive HTML flag (email).
is_templateboolean–Mark the message as reusable starter content.
namestringyesDisplay name of the message in Vision6.
reply_tostring––
subjectstring–Email subject line (required for email). Supports wildcards like %%first_name**there%%.
typestringyes–

No output schema declared.

No examples provided.

vision6_delete_contact ~117

WRITE, IRREVERSIBLE: permanently delete one contact from a list (for example for a privacy erasure request). To stop emailing someone but keep the record, use vision6_update_contact with email_subscribed=false instead. Pass confirm=true only after the user agreed to the deletion. DELETE /lists/{list_id}/contacts?id={contact_id}.

NameTypeReqDescription
confirmbooleanyesMust be true: you confirm the user asked to permanently delete this contact.
contact_idintegeryes–
list_idintegeryes–

No output schema declared.

No examples provided.

vision6_get_account ~61

Details of the API key this server uses: the scopes it grants (e.g. list.view, contact.create, message.edit, report.view) and its creation/expiry time. Use it to see why a request is refused. GET /v1/.

Input schema present but exposes no named parameters.

No output schema declared.

No examples provided.

vision6_get_contact ~72

One contact by id within a list, with all fields. GET /lists/{list_id}/contacts/{contact_id}.

NameTypeReqDescription
contact_idintegeryes–
fieldsstring–Optional comma separated list of response fields to return, e.g. id,email.
list_idintegeryes–

No output schema declared.

No examples provided.

vision6_get_list ~31

One contact list by id. GET /lists/{list_id}.

NameTypeReqDescription
list_idintegeryes–

No output schema declared.

No examples provided.

vision6_get_message ~66

One message by id. With include_content=true the HTML and plain-text body is included. GET /messages/{message_id}.

NameTypeReqDescription
include_contentboolean–Also return the message body (body_html, body_text). Can be large.
message_idintegeryes–

No output schema declared.

No examples provided.

vision6_get_message_sender_defaults ~43

The account's default from name, from address and reply-to, applied to new email messages when you omit them. GET /message-sender-defaults.

Input schema present but exposes no named parameters.

No output schema declared.

No examples provided.

vision6_get_report ~122

One send report by id with all delivery and engagement counts, per-link click counts and recipient domain distribution. Optionally includes A/B test results and social click/share statistics. GET /reports/{report_id}.

NameTypeReqDescription
fieldsstring–Optional comma separated list of response fields to return, e.g. id,email.
include_ab_testboolean–Include A/B test variant statistics (only for A/B test reports).
include_socialboolean–Include Facebook/Twitter/LinkedIn click and share statistics.
report_idintegeryes–

No output schema declared.

No examples provided.

vision6_get_transactional_group ~40

One transactional group by id with its delivery statistics. GET /transactional-groups/{group_id}.

NameTypeReqDescription
group_idintegeryes–

No output schema declared.

No examples provided.

vision6_list_contacts ~269

List the contacts of one list: email, mobile, subscribed/blocked status, active flag, double opt-in and the list's custom fields. Filter by email, mobile, active flag, creation/modification time or any custom field (`filters`, e.g. {"city":"Brisbane"} or {"source:ne":"promo"}). GET /lists/{list_id}/contacts.

NameTypeReqDescription
created_sincestring–Only contacts created at or after this UTC timestamp.
emailstring–Exact email address.
fieldsstring–Optional comma separated list of response fields to return, e.g. id,email.
filtersobject–Custom field filters: key = lowercase field key, optionally with :ne or :in (comma separated values), e.g. {"state:in":"qld,nsw"}.
is_activeboolean––
limitinteger–Results per page, 1-1000 (default 50).
list_idintegeryes–
mobilestring–Exact mobile number (international format without +).
modified_sincestring–Only contacts changed at or after this UTC timestamp.
offsetinteger–Skip this many results (default 0). Pass the previous reply's next_offset.

No output schema declared.

No examples provided.

vision6_list_folders ~114

List the account's folders (list folders and message folders) with id, name, type and size. Needed for the folder id when creating a list or message. GET /folders.

NameTypeReqDescription
limitinteger–Results per page, 1-1000 (default 50).
namestring––
offsetinteger–Skip this many results (default 0). Pass the previous reply's next_offset.
typestring–Folder type, e.g. list or message.

No output schema declared.

No examples provided.

vision6_list_list_fields ~121

The fields (columns) of a contact list: label, type (email, mobile, text, dropdown, date ...), allowed values and whether they are mandatory. The lowercase underscore form of a label is the key used for contact values and filters. GET /lists/{list_id}/fields.

NameTypeReqDescription
limitinteger–Results per page, 1-1000 (default 50).
list_idintegeryes–
offsetinteger–Skip this many results (default 0). Pass the previous reply's next_offset.

No output schema declared.

No examples provided.

vision6_list_lists ~91

List the account's contact lists with id, name, creation/modification time and notification settings. Filter by exact name. GET /lists.

NameTypeReqDescription
limitinteger–Results per page, 1-1000 (default 50).
namestring–Exact list name.
offsetinteger–Skip this many results (default 0). Pass the previous reply's next_offset.

No output schema declared.

No examples provided.

vision6_list_messages ~114

List saved email and SMS messages (templates and campaigns) with id, type, name, subject and sender. Filter by type or exact name/subject. GET /messages.

NameTypeReqDescription
limitinteger–Results per page, 1-1000 (default 50).
namestring–Exact message name.
offsetinteger–Skip this many results (default 0). Pass the previous reply's next_offset.
subjectstring–Exact subject.
typestring––

No output schema declared.

No examples provided.

vision6_list_reports ~193

Send reports for campaigns, newest first: message name, type, sent, bounced, opened, unique clicks, unsubscribes, complaints, total recipients and last sent time. Filter by message, type, test sends or creation time. Click and domain breakdowns are only returned when requested via `fields`. GET /reports.

NameTypeReqDescription
created_sincestring–Only reports created at or after this UTC timestamp.
fieldsstring–Optional comma separated list of response fields to return, e.g. id,email.
is_testboolean–false = only real campaign sends, true = only test sends.
limitinteger–Results per page, 1-1000 (default 50).
message_idinteger––
message_typestring––
offsetinteger–Skip this many results (default 0). Pass the previous reply's next_offset.

No output schema declared.

No examples provided.

vision6_list_sent_contacts ~151

The contacts one message was sent to, with send time, first/last open time and open type (html, text, sms or not_opened). Use it to see who opened a campaign. GET /messages/{message_id}/sent-contacts.

NameTypeReqDescription
contact_idinteger––
limitinteger–Results per page, 1-1000 (default 50).
list_idinteger––
message_idintegeryes–
offsetinteger–Skip this many results (default 0). Pass the previous reply's next_offset.
open_typestring––
report_idinteger–Only sends belonging to this report.

No output schema declared.

No examples provided.

vision6_list_transactional_groups ~126

Transactional send groups (one per group name used with vision6_send_transactional) with sent, failed, bounced, delivered, opened, clicked and unsubscribed counts. GET /transactional-groups.

NameTypeReqDescription
limitinteger–Results per page, 1-1000 (default 50).
namestring–Exact group name.
offsetinteger–Skip this many results (default 0). Pass the previous reply's next_offset.
typestringyesGroup type (the reference marks it required; call once per type).

No output schema declared.

No examples provided.

vision6_send_transactional ~398

WRITE: SENDS REAL EMAIL OR SMS to the recipients immediately (asynchronously) and USES ACCOUNT SENDING CREDITS. It cannot be recalled. Up to 100 recipients per call, each identified by exactly one of contact_id, email or mobile, plus optional personalisation values (wildcards %%key%% in the body). Either send a saved message (message_id) or custom content (subject/body_html/body_text, and for SMS body_text + from_address). Unsubscribed addresses are skipped. Email always needs list_id. Results appear in the transactional group (vision6_get_transactional_group). The account owner's email must be confirmed in Vision6 first. Pass confirm_send=true only after the user approved these recipients and this content. POST /transactional-sends.

NameTypeReqDescription
body_htmlstring–Custom HTML body (email, without message_id).
body_textstring–Custom plain-text body (email or SMS, without message_id).
confirm_sendbooleanyesMust be true: you confirm the user approved sending this email/SMS now (it cannot be recalled and uses credits).
from_addressstring–Verified sender email address, or the sender mobile number for SMS.
from_namestring––
group_idinteger––
group_namestring–Name of the transactional group that collects the results (created if new). One of group_name or group_id is required.
list_idinteger–List the recipients belong to (required for email; optional for SMS).
message_idinteger–A saved message to send. Do not combine with custom content.
recipientsarrayyes–
reply_tostring––
subjectstring–Custom email subject (without message_id).
typestringyes–
unsubscribe_typestring–SMS with custom content only: how recipients can opt out.

No output schema declared.

No examples provided.

vision6_update_contact ~272

WRITE: change one contact's email, mobile, custom field values, subscription status (email_subscribed/mobile_subscribed=false unsubscribes), active flag or double opt-in. Only the fields you pass change. May trigger 'contact updated' automations. Returns the updated contact. PATCH /lists/{list_id}/contacts/{contact_id}.

NameTypeReqDescription
contact_idintegeryes–
double_opt_inboolean–true marks the contact as already confirmed (sets the double opt-in time to now). It cannot be reset to false afterwards.
emailstring–Email address (the list must have an Email field).
email_subscribedboolean–Whether the email address is subscribed to receive messages.
fieldsobject–Custom list field values, keyed by the lowercase key of the field name (underscores for spaces/dashes, e.g. first_name). Use vision6_list_list_fields to see the list's fields.
is_activeboolean–The contact's active status.
list_idintegeryes–
mobilestring–Mobile number in international format without + or spaces (Australia: 61400000009). The list must have a Mobile field.
mobile_subscribedboolean–Whether the mobile number is subscribed to receive messages.

No output schema declared.

No examples provided.

vision6_update_message ~297

WRITE: change a saved message's name, subject, sender, folder or body. Only the fields you pass change. It does not send anything. PATCH /messages/{message_id}.

NameTypeReqDescription
content_htmlstring–HTML body (email types html and plain-html; raw_html accepts it or content_html_raw).
content_html_rawstring–Raw HTML document (email type raw_html).
content_smsstring–SMS text (required for an sms message; keep it near 500 characters).
content_textstring–Plain-text body (email types plain and plain-html).
folder_idinteger–Message folder id (see vision6_list_folders with type message). Omit to use the account's first message folder.
from_addressstring–Sender address. For email it must be a verified address/domain in the account. Omit to use the account's saved default (see vision6_get_message_sender_defaults).
from_namestring––
is_responsiveboolean–Responsive HTML flag (email).
is_templateboolean–Mark the message as reusable starter content.
message_idintegeryes–
namestring–Display name of the message in Vision6.
reply_tostring––
subjectstring–Email subject line (required for email). Supports wildcards like %%first_name**there%%.

No output schema declared.

No examples provided.

Install

How do I install the Vision6 MCP by usefulapi server?

Vision6 MCP by usefulapi is a hosted endpoint at https://vision6.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 · vision6.usefulapi.io

# add to Claude Code
claude mcp add --transport http io-usefulapi-vision6 'https://vision6.usefulapi.io/mcp'
Common questions

What is the Vision6 MCP by usefulapi server?

Vision6 MCP by usefulapi is listed in the public MCP registry as io.usefulapi/vision6. Read Vision6 lists, contacts, messages and reports; update contacts; send transactional email/SMS. This page covers its hosted endpoint (https://vision6.usefulapi.io/mcp).

Is the Vision6 MCP by usefulapi server safe to use?

Vision6 MCP by usefulapi scores 60 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 Vision6 MCP by usefulapi server expose?

Vision6 MCP by usefulapi exposes 23 tools: vision6_get_account, vision6_list_lists, vision6_get_list, vision6_list_list_fields, vision6_list_folders, and 18 more. Their descriptions and schemas cost roughly 3,633 tokens of context every time the server is loaded.

Does the Vision6 MCP by usefulapi server require authentication?

Yes. Vision6 MCP by usefulapi asked us for credentials when we connected, so you will need to authorise it in your MCP client before it can do anything.

Is the Vision6 MCP by usefulapi server still maintained?

Vision6 MCP by usefulapi is still listed as active in the MCP registry. We last reached this channel on 25 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.