MCP HeartbeatTHE MCP OBSERVATORY
Public workspace

Explore

Evidence for your next connection.

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

Read-only probes

MCP server · Communication & messaging

Emma MCP by usefulapi

By usefulapi.io Verified namespace

Read audiences, groups, mailings and campaign results without sending email or changing contacts.

WebsiteSource codeProductivity & docs
Connect to Emma MCP by usefulapi
Checks passed
14 / 22

0 failed · 8 not measured

Median response
59 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Outdated check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 59 ms.

  • Pass
    Valid handshake

    protocolVersion 2025-11-25, serverInfo.name emma-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 59 ms over 1 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 59 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

    61 of 61 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 2026-11-10T23:34:24.086613Z, within 180 days.

  • Not measured
    Open-source licence

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

Start using Emma 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 emma-mcp-by-usefulapi https://emma.usefulapi.io/mcp

Capabilities

Tools 19

emma_find_member_by_email

Find one member by email address, with all custom fields and status. A 404 means the address is not in the audience.

Discovered
emma_get_group

Get one member group with its member counts (active, opted-out, error).

Discovered
emma_get_import

Status and results of one bulk member import (by import id), or, without an id, the list of all imports of the account.

Discovered
emma_get_mailing

Get one mailing in full: content (HTML and plain text), recipients (groups, searches, segments), links, schedule, status.

Discovered
emma_get_mailing_response

Response summary of one mailing: recipients, sent, delivered, bounced, opened, clicked (unique and total), forwarded, opt-outs, sign-ups.

Discovered
emma_get_member

Get one member by id, with all custom fields, status, SMS status and bounce count.

Discovered
emma_get_member_groups

List the groups one member belongs to.

Discovered
emma_get_member_mailings

The mailing history of one member: which mailings they were sent and what they did with them.

Discovered
emma_get_response_summary

Month-by-month response statistics for the whole account: mailings, sent, delivered, bounced, opened, clicked, forwarded, opt-outs, sign-ups (test mailings excluded).

Discovered
emma_get_search_members

The members that currently match a saved search. Paged: use next_start.

Discovered
emma_list_fields

List the custom member fields of the account (shortcut names, display names, types).

Discovered
emma_list_group_members

List the members of one group (email, status, custom fields). Paged: use next_start for more.

Discovered
emma_list_groups

List the member groups (audience lists) of the Emma account with their active, opted-out and error member counts. Defaults to normal groups; group_types can add test and hidden groups.

Discovered
emma_list_mailing_activity

Who did what with one mailing: members it was sent to (sends), still in the queue (in_progress), delivered or bounced (deliveries), opened (opens), clicked (clicks), forwarded, opted out (optouts) or signed up (signups). Each row has the member's email and timestamp. Paged: use next_start.

Discovered
emma_list_mailing_links

The links of one mailing with their unique and total clicks.

Discovered
emma_list_mailing_members

List the individual members a mailing was sent to (not groups or searches). Paged: use next_start.

Discovered
emma_list_mailings

List mailings (campaigns): id, name, subject, sender, status (p pending, a paused, i injecting, s sending, x canceled, c complete, w waiting, u unapproved, f failed), type, recipient count, scheduled time. Defaults to standard and test mailings in all statuses, newest first. Paged: use next_start.

Discovered
emma_list_members

List the members (contacts) of the whole audience: id, email, status (a active, o opted out, e error), custom fields, bounce count. Paged: use next_start for more. With count_only the reply is just the number of members.

Discovered
emma_list_searches

List the saved searches (dynamic segments) of the account, with their criteria.

Discovered

Recent measurements

Probe history

View status
Latest stored probes. Raw probe rows are kept for 14 days.
CheckedResultResponseTools
Connected59 ms19

Related servers

All alternatives

Same function and industry, ranked by checks passed then median latency.

Explore alternatives to Emma MCP by usefulapi