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Mailchain MCP server

Mailchain is a simple, secure, and decentralized communications protocol that enables blockchain-based email.

Mailchain is not a separate install. One Activepieces MCP server exposes it alongside 760+ other apps, behind a single URL.

Start building See the Mailchain integration
Tools
2
Works with
Any MCP client
Auth
API key
License
MIT, open source
Updated
August 2026

About the Mailchain MCP server

Connect Mailchain once in Activepieces and every action it ships becomes a tool your assistant can call, behind the same server URL as the rest of your apps. Your agent reaches Mailchain and 760+ other apps over a single connection, on our cloud or a self-hosted install.

Tools

Mailchain tools your AI can run

Once connected, your assistant can call any of these Mailchain actions by asking in plain language.

  • Get Authenticated User

    Get the authenticated user to the Mailchain Protocol

  • Send Email

    Send an email to blockchain or mailchain addresses

    4 fields

Give your assistant Mailchain

Connect Mailchain once and every tool above is callable from Claude, Cursor or any MCP client, behind the same server URL as 760+ other apps. Free to start.

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Mailchain MCP, answered.

No. That is the point of it. One Activepieces server exposes Mailchain alongside every other piece you connect, so your client keeps a single connection.

Yes. Activepieces is open source and free to start, and the MCP server is included on every plan, from the free cloud tier to any self-hosted deployment.

Connect Mailchain in Activepieces, enable the server under Settings → MCP Server, then paste your server URL into your client config. It authenticates over OAuth on first use.

It can call 2 tools, including Get Authenticated User, Send Email, and chain them with steps in other apps inside the same run.

Connections use OAuth2 with limited scopes and are stored under 256-bit encryption, with no API to read them back, so an agent gets scoped access rather than your keys.

Guides using Mailchain

Mailchain automation Read our quick guide on Mailchain automation. Discover how it works, explore common use cases, and learn how Activepieces can help.