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

Read-only probes

MCP server · Automation & workflows

MailerLite MCP by usefulapi

By usefulapi.io Verified namespace

Read subscribers, groups, campaigns, fields, segments, automations, webhooks; safe additive writes.

WebsiteSource code
Connect to MailerLite MCP by usefulapi
Checks passed
14 / 22

0 failed · 8 not measured

Median response
120 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
13

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Outdated check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 120 ms.

  • Pass
    Valid handshake

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

  • Pass
    Lists tools

    tools/list returned 13 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 120 ms over 1 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 120 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

    34 of 34 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 2026-11-10T23:33:29.364845Z, within 180 days.

  • Not measured
    Open-source licence

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

Start using MailerLite 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 mailerlite-mcp-by-usefulapi https://mailerlite.usefulapi.io/mcp

Capabilities

Tools 13

mailerlite_assign_subscriber_to_group

Adds a subscriber to a group (additive membership). MailerLite API: POST /subscribers/{subscriber_id}/groups/{group_id}.

Discovered
mailerlite_create_group

Creates a subscriber group/list (additive). MailerLite API: POST /groups.

Discovered
mailerlite_get_campaign

Fetch a single campaign by id. Read-only. MailerLite API: GET /campaigns/{campaign_id}.

Discovered
mailerlite_get_subscriber

Fetch a single subscriber by id or email address. MailerLite API: GET /subscribers/{id}.

Discovered
mailerlite_list_automations

List automations (workflows), optionally filtered by enabled state. Page-paginated. MailerLite API: GET /automations.

Discovered
mailerlite_list_campaigns

List campaigns, optionally filtered by status. Page-paginated. Read-only — this server does NOT send campaigns. MailerLite API: GET /campaigns.

Discovered
mailerlite_list_fields

List custom/default subscriber fields, optionally filtered by type or keyword. Page-paginated. MailerLite API: GET /fields.

Discovered
mailerlite_list_group_subscribers

List the subscribers belonging to a group, optionally filtered by status. Cursor-paginated. MailerLite API: GET /groups/{group_id}/subscribers.

Discovered
mailerlite_list_groups

List subscriber groups/lists, optionally filtered by name. Page-paginated. MailerLite API: GET /groups.

Discovered
mailerlite_list_segments

List segments. Page-paginated. MailerLite API: GET /segments.

Discovered
mailerlite_list_subscribers

List subscribers, optionally filtered by status. Cursor-paginated. MailerLite API: GET /subscribers.

Discovered
mailerlite_list_webhooks

List configured webhooks. Page-paginated. MailerLite API: GET /webhooks.

Discovered
mailerlite_upsert_subscriber

Creates or updates a subscriber (upsert by email). Additive — does NOT send any email. MailerLite API: POST /subscribers.

Discovered

Recent measurements

Probe history

View status
Latest stored probes. Raw probe rows are kept for 14 days.
CheckedResultResponseTools
Connected120 ms13

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