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letterport

dev.letterport/letterport · v1.0.0

Real email inboxes for AI agents: create addresses, read mail as JSON, reply in threads.

Connect Remote server

Terminal
claude mcp add --transport http letterport https://api.letterport.dev/mcp --header "Authorization: Bearer <YOUR_API_KEY>"
~/.cursor/mcp.json
{
  "mcpServers": {
    "letterport": {
      "url": "https://api.letterport.dev/mcp",
      "headers": {
        "Authorization": "Bearer <YOUR_API_KEY>"
      }
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "letterport": {
      "type": "http",
      "url": "https://api.letterport.dev/mcp",
      "headers": {
        "Authorization": "Bearer <YOUR_API_KEY>"
      }
    }
  }
}
Claude Desktop
Settings > Connectors > Add custom connector
URL: https://api.letterport.dev/mcp

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools

This server asks for a key before it lists its tools. Connect it with your own key to see them.

Headers

NameDescription
Authorization
Optional, secret
Optional. Clients that sign in through the browser (OAuth) need nothing; others send Bearer lp_… (an API key).

Details

Endpointhttps://api.letterport.dev/mcp (Streamable HTTP)
First published23 Oct 2026
Last updated23 Oct 2026
Registry namedev.letterport/letterport

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