letterport
by letterport.dev · dev.letterport/letterport
Real email inboxes for AI agents: create addresses, read mail as JSON, reply in threads.
- Category
- Messaging and email
- Connection
- Remote (HTTP)
- Tools
- Shown after sign-in
- Status
- Online, needs sign-in
Connect it to your AI
Claude Code
claude mcp add --transport http letterport https://api.letterport.dev/mcpClaude, ChatGPT, Cursor and other apps
Add it as a custom connector with this URL (Streamable HTTP):
https://api.letterport.dev/mcpThis server expects extra headers, usually an API key from its maker.
Cursor, VS Code and other apps (mcp.json)
{
"mcpServers": {
"letterport": {
"url": "https://api.letterport.dev/mcp"
}
}
}Questions
What is the letterport MCP server?
Real email inboxes for AI agents: create addresses, read mail as JSON, reply in threads. It is made by letterport.dev and listed in the official MCP Registry as dev.letterport/letterport. MCP (Model Context Protocol) is the open standard that lets AI apps like Claude, ChatGPT and Cursor use outside tools.
How do I add letterport to Claude?
In the Claude app or claude.ai, open Settings, then Connectors, choose "Add custom connector" and paste https://api.letterport.dev/mcp. In Claude Code, run: claude mcp add --transport http letterport https://api.letterport.dev/mcp
How do I add letterport to ChatGPT?
ChatGPT can use remote MCP servers as connectors. In ChatGPT settings, under Apps and Connectors, turn on developer mode if asked, create a new connector and paste https://api.letterport.dev/mcp.
How do I add letterport to Cursor?
Open Cursor settings, go to MCP, choose "Add new MCP server" (or edit ~/.cursor/mcp.json) and add: { "mcpServers": { "letterport": { "url": "https://api.letterport.dev/mcp" } } }
Does letterport work right now?
It is online and asks you to sign in before it lists its tools, which is normal for servers tied to an account.
Is this your server? Get the badge for your README
Markdown (GitHub README)
[](https://chen.media/mcp/dev-letterport-letterport)HTML (switches to dark mode on its own)
<a href="https://chen.media/mcp/dev-letterport-letterport"><picture><source media="(prefers-color-scheme: dark)" srcset="https://chen.media/mcp/badge/dev-letterport-letterport.svg?theme=dark"><img src="https://chen.media/mcp/badge/dev-letterport-letterport.svg" alt="Listed on chen.media/mcp" height="40"></picture></a>More in Messaging and email
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