Email inboxes for AI agents: create an inbox, then block until the OTP or magic link arrives.

How do I install mailsocket?

Clone mailsocket from https://github.com/mailsocket/mailsocket-sdk and configure it as an MCP server in your client (Claude Desktop, Cursor, or VS Code).

Is mailsocket open source?

Yes, mailsocket is open source under the MIT license. Source code is available at https://github.com/mailsocket/mailsocket-sdk.

What category does mailsocket belong to?

mailsocket is listed under Communication MCP servers on MCPFind.

mailsocket — MCP Server for Communication

mailsocket SDKs & MCP server

mailsocket is an inbox API for OTP and magic-link signup automation: email in, JSON out. GET /inboxes/{id}/messages/wait?require=otp blocks and returns the OTP the instant it arrives — no polling, no IMAP. Built for signup automation, E2E tests, and AI agents.

This repo holds the official client packages.

Package	Install	Docs
Python	`pip install mailsocket`	python/
TypeScript / Node	`npm i mailsocket-sdk`	typescript/
MCP server (AI agents)	`uvx mailsocket-mcp`	mcp/

Full docs: mailsocket.app · dash.mailsocket.app/docs/

MCP config

Point any MCP-compatible client (Claude Desktop, Cursor, Claude Code) at the mailsocket-mcp server over stdio:

{
  "mcpServers": {
    "mailsocket": {
      "command": "uvx",
      "args": ["mailsocket-mcp"],
      "env": {
        "MAILSOCKET_API_KEY": "ms_live_..."
      }
    }
  }
}

See mcp/README.md for per-client config file locations and the full tool list.

Examples

examples/playwright/ — a reference Playwright test that fills a signup form with a mailsocket inbox address and blocks on the wait endpoint until the OTP arrives.

License

MIT — see LICENSE.

Set up in your AI client

AI clientOperating system

Merge this template into ~/Library/Application Support/Claude/claude_desktop_config.json. Keep existing servers. Add any arguments, credentials, and permissions required by the maintainer; this template has not been install-tested.

json

{
  "mcpServers": {
    "app-mailsocket-mailsocket-mcp": {
      "command": "uvx",
      "args": [
        "mailsocket-mcp"
      ]
    }
  }
}

Restart Claude Desktop completely for changes to take effect. Confirm the server appears connected in the client’s tool list, then try a read-only example from its documentation.

Claude Desktop setup reference

Compatible MCP Clients

mailsocket works with any MCP-compatible client. Copy the config snippet from the Configuration section above and add it to the file shown for your client, then restart the application.

Claude Desktop~/Library/Application Support/Claude/claude_desktop_config.jsonRestart Claude Desktop completely for changes to take effect.

Cursor~/.cursor/mcp.jsonRestart Cursor for changes to take effect.

VS Code.vscode/mcp.jsonReload VS Code window for changes to take effect.

Windsurf~/.codeium/windsurf/mcp_config.jsonRestart Windsurf for changes to take effect.

Claude Code.mcp.jsonSave at the project root, then start Claude Code in that project and review the MCP server approval prompt. Keep real credentials out of shared files.

mailsocket