MCP server

letterport Official

dev.letterport/letterport

Checked 26 Oct 2026, 08:29 UTC · It answered and asked for a sign-in

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

Website

At a glance

Type

MCP server

Publisher

letterport.dev (verified by the MCP Registry)

Status

Signs in with your account

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http letterport https://api.letterport.dev/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.letterport]
url = "https://api.letterport.dev/mcp"

Gemini CLI

{"mcpServers":{"letterport":{"httpUrl":"https://api.letterport.dev/mcp"}}}

Cursor

{"mcpServers":{"letterport":{"url":"https://api.letterport.dev/mcp"}}}

VS Code

{"servers":{"letterport":{"type":"http","url":"https://api.letterport.dev/mcp"}}}

Antigravity

agy mcp add letterport https://api.letterport.dev/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"letterport","server_url":"https://api.letterport.dev/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"letterport","server_url":"https://api.letterport.dev/mcp"}

Signs in with your account: your agent app opens a sign-in page the first time you use it.

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