mcpbeat

Mailerlite MCP Server

io.usefulapi/mailerlite
not responding

Mailerlite is listed as active in the registry but did not answer our last check. It exposes 13 tools. Last commit 1 Aug 2026.

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

Uptime history 40 hours of history · worst hour 0%
40 hours agonow
33.0%
Uptime 24h
30 of 91 checks
13
Tools
read from the server
176 ms
Response time
average over 24h
0
Stars
last commit 1 Aug 2026

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 7 min ago.

run in your terminal
claude mcp add mailerlite --transport http https://mailerlite.usefulapi.io/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "mailerlite": {
      "url": "https://mailerlite.usefulapi.io/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.mailerlite]
url = "https://mailerlite.usefulapi.io/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "mailerlite": {
      "url": "https://mailerlite.usefulapi.io/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "mailerlite": {
      "url": "https://mailerlite.usefulapi.io/mcp"
    }
  }
}

Available tools 13

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

mailerlite
mailerlite_assign_subscriber_to_group
Adds a subscriber to a group (additive membership). MailerLite API: POST /subscribers/{subscriber_id}/groups/{group_id}.
mailerlite_create_group
Creates a subscriber group/list (additive). MailerLite API: POST /groups.
mailerlite_get_campaign
Fetch a single campaign by id. Read-only. MailerLite API: GET /campaigns/{campaign_id}.
mailerlite_get_subscriber
Fetch a single subscriber by id or email address. MailerLite API: GET /subscribers/{id}.
mailerlite_list_automations
List automations (workflows), optionally filtered by enabled state. Page-paginated. MailerLite API: GET /automations.
mailerlite_list_campaigns
List campaigns, optionally filtered by status. Page-paginated. Read-only — this server does NOT send campaigns. MailerLite API: GET /campaigns.
mailerlite_list_fields
List custom/default subscriber fields, optionally filtered by type or keyword. Page-paginated. MailerLite API: GET /fields.
mailerlite_list_group_subscribers
List the subscribers belonging to a group, optionally filtered by status. Cursor-paginated. MailerLite API: GET /groups/{group_id}/subscribers.
mailerlite_list_groups
List subscriber groups/lists, optionally filtered by name. Page-paginated. MailerLite API: GET /groups.
mailerlite_list_segments
List segments. Page-paginated. MailerLite API: GET /segments.
mailerlite_list_subscribers
List subscribers, optionally filtered by status. Cursor-paginated. MailerLite API: GET /subscribers.
mailerlite_list_webhooks
List configured webhooks. Page-paginated. MailerLite API: GET /webhooks.
mailerlite_upsert_subscriber
Creates or updates a subscriber (upsert by email). Additive — does NOT send any email. MailerLite API: POST /subscribers.

Endpoints

URLTransportStateLatencyChecked
https://mailerlite.usefulapi.io/mcp streamable-http answering 45 ms 7 min ago

Mailerlite — questions

Answers built from our own checks of this server.

What can Mailerlite do?
It exposes 13 tools, read directly from the server on our last check. Among them: mailerlite_assign_subscriber_to_group, mailerlite_create_group, mailerlite_get_campaign, mailerlite_get_subscriber, mailerlite_list_automations, mailerlite_list_campaigns and 7 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is Mailerlite working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 30 of 91 checks got a reply (33.0%), average response time 176 ms. The bar chart above shows every period we have measured.
The registry lists Mailerlite as active — why does it not respond?
The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.
How do I connect Mailerlite?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Mailerlite need an API key?
No. Mailerlite completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 13 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Mailerlite?
It answers our handshake in 176 ms on average, which is faster than 68% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is Mailerlite open source?
Yes — it is published under the MIT licence, written in JavaScript and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.