Letter IRL is answering right now. Last checked 9 min ago.
Write, preview and mail real letters and postcards to US addresses from your AI app.
Nothing serious here today
Today is the operative word: we check Letter IRL every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
Connect this server
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 9 min ago.
claude mcp add letter-irl --transport http https://api.letterirl.com/mcphttps://api.letterirl.com/mcp[mcp_servers.letter-irl]
url = "https://api.letterirl.com/mcp"{
"mcpServers": {
"letter-irl": {
"url": "https://api.letterirl.com/mcp"
}
}
}{
"servers": {
"letter-irl": {
"type": "http",
"url": "https://api.letterirl.com/mcp"
}
}
}This endpoint answered with an authorization challenge. The server is running, and it signs you in through your browser: there is no API key to paste.
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://api.letterirl.com/mcp | streamable-http | sign-in | 421 ms | 9 min ago |
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Letter IRL — questions
Answers built from our own checks of this server.