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Independent measurements of remote MCP servers. Every observation has a timestamp.

Read-only probes

MCP server · Communication & messaging

Missive MCP by usefulapi

By usefulapi.io Verified namespace

Read email/chat conversations, messages, contacts and teams; draft, send and update threads.

WebsiteSource codeProductivity & docsCommunication & social
Connect to Missive MCP by usefulapi
Checks passed
14 / 22

0 failed · 8 not measured

Median response
52 ms

Median of successful probes over 7 days

30-day uptime
Not measured

Share of countable probes over 30 days, including daily rollups. Auth challenges are excluded.

Discovered tools
19

Tool definitions returned by this server

Independent monitoring

Health & checks

Status history

Outdated check

Last connection measurement is over 24 hours old. Current availability is unknown.

Last checked
Check summary by test group
Test areaPassedFailedUnmeasured
ConnectionCan a client connect and discover tools?
500
Reliability & speedDoes it respond consistently and quickly?
004
Access & authenticationWhat is required to use this server?
102
Tool qualityAre the tool definitions usable by an agent?
400
Publisher identityCan the publisher be traced to its source?
402

Unmeasured means there is not enough evidence to decide. How these checks work

Inspect individual checks 22 recorded

Core

  • Pass
    Reachable

    Latest probe returned HTTP 200 in 52 ms.

  • Pass
    Valid handshake

    protocolVersion 2025-11-25, serverInfo.name missive-mcp.

  • Pass
    Lists tools

    tools/list returned 19 tools.

  • Pass
    Current protocol

    Negotiated 2025-11-25. The bar is 2025-06-18 or newer.

  • Pass
    HTTPS

    The endpoint URL is https.

Performance

  • Not measured
    Fast (p50)

    Median latency 52 ms over 1 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 52 ms over 1 samples in 7 days. The bar is 3000 ms. Need at least 20 samples.

  • Not measured
    Reliable (uptime)

    1 of 1 attempts returned a tool list in 30 days (100%). The bar is 99%. Need at least 30 samples.

  • Not measured
    Stable tool list

    Fewer than two successful probes in 30 days, so tool-list stability is not measured.

Access

  • Pass
    Open access

    tools/list succeeded with no credential, and the record declares none.

  • Not measured
    Standard auth

    Auth is not required, so the OAuth metadata check does not apply.

  • Not measured
    Free tier cited

    No publisher quote has been checked.

Tools

  • Pass
    Tools described

    Every tool description is at least 20 characters.

  • Pass
    Valid input schemas

    Every inputSchema is a JSON Schema object.

  • Pass
    Parameters documented

    91 of 91 parameters have a description (100%). The bar is 80%.

  • Pass
    Safety hints

    Every tool sets readOnlyHint or destructiveHint.

Publisher

  • Pass
    Verified namespace

    Listed in the Official MCP Registry.

  • Pass
    Website matches publisher

    The website host matches the reverse-domain namespace.

  • Pass
    Source repo linked

    A repository URL is on file.

  • Not measured
    Repo owner matches

    This namespace is not an io.github login, so the owner comparison does not apply.

  • Pass
    Recently updated

    Updated 2026-11-10T23:33:30.219256Z, within 180 days.

  • Not measured
    Open-source licence

    The GitHub licence lookup has not returned an OSI result yet.

Start using Missive MCP by usefulapi

Connect to this server

Choose your client, copy the configuration, then enable the server in your client’s MCP settings.

Run this command in your terminal, then restart Claude Code.

Claude Code

claude mcp add --transport http missive-mcp-by-usefulapi https://missive.usefulapi.io/mcp

Capabilities

Tools 19

missive_create_contact

Create a contact in the given contact book. Missive: POST /contacts.

Discovered
missive_create_draft

Create a draft email/message. WARNING: setting send=true SENDS a real email immediately (send_at schedules it) instead of saving a draft. Attach to an existing thread with `conversation`. Missive: POST /drafts.

Discovered
missive_get_contact

Get a single contact by id. Missive: GET /contacts/{id}.

Discovered
missive_get_conversation

Get a single conversation by id. Missive: GET /conversations/{id}.

Discovered
missive_get_message

Get a single message, including the full body. Missive: GET /conversations/{conversation_id}/messages/{id}.

Discovered
missive_list_contact_books

List contact books (address books). Missive: GET /contact_books.

Discovered
missive_list_contact_groups

List contact groups or organizations within a contact book. Missive: GET /contact_groups.

Discovered
missive_list_contacts

List contacts in a contact book. Missive: GET /contacts.

Discovered
missive_list_conversation_comments

List internal comments (team chat) on a conversation. Missive: GET /conversations/{id}/comments.

Discovered
missive_list_conversation_drafts

List draft messages on a conversation. Missive: GET /conversations/{id}/drafts.

Discovered
missive_list_conversation_messages

List the messages (emails) in a conversation. Missive: GET /conversations/{id}/messages.

Discovered
missive_list_conversation_posts

List posts (integration/app-generated items) on a conversation. Missive: GET /conversations/{id}/posts.

Discovered
missive_list_conversations

List conversations (email/chat threads). Missive requires EXACTLY ONE mailbox-type filter — one of inbox / assigned / closed / flagged / snoozed / trashed / all / shared_label / team_inbox / team_all / organization. Missive: GET /conversations.

Discovered
missive_list_organizations

List organizations you belong to. Missive: GET /organizations.

Discovered
missive_list_responses

List canned responses / templates. Missive: GET /responses.

Discovered
missive_list_shared_labels

List shared labels (team-shared folders/tags). Missive: GET /shared_labels.

Discovered
missive_list_teams

List teams in the organization(s). Missive: GET /teams.

Discovered
missive_list_users

List users (team members). Missive: GET /users.

Discovered
missive_update_conversation

Update a conversation — assign/unassign users, add/remove shared labels, close/reopen, move to inbox, or set subject/color/team. Missive: PATCH /conversations/{id}.

Discovered

Recent measurements

Probe history

View status
Latest stored probes. Raw probe rows are kept for 14 days.
CheckedResultResponseTools
Connected52 ms19

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