How do I connect an AI agent to rapidmail MCP by usefulapi?

Use the MCP streamable HTTP endpoint https://rapidmail.usefulapi.io/mcp.

Catalog › io.usefulapi/rapidmail

Is rapidmail MCP by usefulapi reliable?

Reliable (measured) Yes. Faceabot measured rapidmail MCP by usefulapi 25 times: 100% of checks succeeded, including the last 25 in a row (last check 2026-10-19 12:15 UTC).

Last check: 2026-10-19 12:15 UTC · answered in 6921 ms · remote (no install)

En français : Fiable (mesuré). Faceabot teste cet outil lui-même, en continu, sans dépendre de ce que son auteur affirme.

What it does

Read rapidmail lists, recipients, mailings and stats; add, update or unsubscribe one recipient.

Source: official MCP registry (registry.modelcontextprotocol.io) · version 1.0.0 · publisher website

Connect your agent

{
  "mcpServers": {
    "rapidmail": {
      "url": "https://rapidmail.usefulapi.io/mcp"
    }
  }
}

Or ask Faceabot first: MCP tool check_reliability {"id":"io.usefulapi/rapidmail"} on https://faceabot.com/api/mcp.

Does it actually do the job?

Not tested with a real task yet. Faceabot only runs real tasks on tools that declare themselves read-only (readOnlyHint), with a neutral sample input.

Faceabot measurements

When	Answers	Real task	Latency
2026-10-19 12:15 UTC	✅ ok	❌ auth_required	6921 ms
2026-10-18 19:55 UTC	✅ ok	❌ auth_required	5167 ms
2026-10-18 07:00 UTC	✅ ok	❌ auth_required	5540 ms
2026-10-17 23:10 UTC	✅ ok	❌ auth_required	4810 ms
2026-10-17 15:00 UTC	✅ ok	❌ auth_required	7059 ms
2026-10-17 06:55 UTC	✅ ok	❌ auth_required	6053 ms
2026-10-16 23:10 UTC	✅ ok	❌ auth_required	4543 ms
2026-10-16 16:01 UTC	✅ ok	❌ auth_required	6591 ms
2026-10-16 09:01 UTC	✅ ok	❌ auth_required	5486 ms
2026-10-16 02:05 UTC	✅ ok	❌ auth_required	7145 ms
2026-10-15 19:10 UTC	✅ ok	❌ auth_required	6896 ms
2026-10-15 12:26 UTC	✅ ok	❌ auth_required	4976 ms
2026-10-15 05:50 UTC	✅ ok	❌ auth_required	2832 ms
2026-10-14 23:15 UTC	✅ ok	❌ auth_required	1898 ms
2026-10-14 16:50 UTC	✅ ok	❌ auth_required	6553 ms
2026-10-14 10:20 UTC	✅ ok	❌ auth_required	4421 ms
2026-10-14 03:46 UTC	✅ ok	❌ auth_required	8207 ms
2026-10-13 21:15 UTC	✅ ok	❌ auth_required	5705 ms
2026-10-13 15:05 UTC	✅ ok	❌ auth_required	10540 ms
2026-10-13 09:01 UTC	✅ ok	❌ auth_required	7706 ms

Method: MCP initialize then tools/list from Faceabot (FaceabotProbe/1.0), plus one read-only tool call with a neutral input when the server declares one, repeated over time. This checks that the server is up and speaks MCP correctly; it does not certify the quality or safety of each tool. How measurement works.

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Publisher of rapidmail MCP by usefulapi?

Show your measured reliability on your README or website:

[![Measured by Faceabot](https://faceabot.com/badge/io.usefulapi/rapidmail.svg)](https://faceabot.com/tools/io.usefulapi/rapidmail)

Data in JSON: /api/catalog?id=io.usefulapi/rapidmail · Stop probes: POST /api/reliability/opt-out

AI agents: all of this is available without keys over MCP https://faceabot.com/api/mcp · HTTP https://faceabot.com/api/catalog?q=… · Guide : llms.txt

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