com.mailslurp/mailslurp

MailSlurp

Is the MailSlurp MCP server down? No. It is up and needs auth (HTTP 401), probed 2026-11-11.

Email and SMS inboxes for AI agents, plus email rendering, inbox placement and sender warmup.

needs auth probed 2026-11-15 · unchanged since 2026-11-11 · HTTP 401 · Bearer

Streamable HTTP error: Error POSTing to endpoint: {
  "jsonrpc" : "2.0",
  "id" : 0,
  "error" : {
    "code" : -32000,
    "message" : "MCP authentication fail

Endpoint: https://api.mailslurp.com/mcp (streamable-http)
Host: api.mailslurp.com
Getting access: OAuth with dynamic client registration. A client such as Claude Code, Cursor or npx mcpcost auth https://api.mailslurp.com/mcp registers itself and opens the consent page; the publisher has nothing to set up for you. The publisher's guide to getting access.
Authorization server api.mailslurp.com, PKCE S256, grants authorization_code, refresh_token.
Scopes mcp:draft:read mcp:draft:send mcp:draft:write mcp:email:read mcp:email:reply mcp:inbox:manage mcp:placement:read mcp:placement:write mcp:render:read mcp:render:write mcp:sender:read mcp:sender:write mcp:sms:read mcp:sms:send mcp:warmup:read mcp:warmup:write.
Read from the server's public OAuth metadata, without a token. Method.
Website: https://www.mailslurp.com/docs/mcp/
Registry: active, updated 2026-11-11 · registry entry

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Badge for the README

The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.

Atom feed

A mail when this server changes

Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.

For the publisher

The server answers HTTP 401 to an unauthenticated initialize, so the probe cannot list its tools. That is correct for a private server. Some public servers answer initialize and tools/list without credentials and ask for auth on tool calls only; those get a token count here.

Fixed something? Probe it now, with the same steps as the daily run. This page updates with the next daily run.