mcpbeat

Reletter MCP Server

com.reletter/reletter
answering

Reletter is answering right now. Last checked 1 min ago.

Search and analyze 7M+ newsletters, issues, contacts, and chart rankings from Reletter.

Uptime history 3 hours of history
3 hours agonow
100.0%
Uptime 24h
7 of 7 checks
—
Tools
hidden behind auth
279 ms
Response time
average over 24h
API key or OAuth
Access
streamable-http

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 1 min ago.

run in your terminal
claude mcp add reletter --transport http https://mcp.reletter.com
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "reletter": {
      "url": "https://mcp.reletter.com"
    }
  }
}
~/.codex/config.toml
[mcp_servers.reletter]
url = "https://mcp.reletter.com"
.cursor/mcp.json
{
  "mcpServers": {
    "reletter": {
      "url": "https://mcp.reletter.com"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "reletter": {
      "url": "https://mcp.reletter.com"
    }
  }
}

This endpoint answered with an authorization challenge — the server is running, but you need an API key or OAuth to use it.

Endpoints

URLTransportStateLatencyChecked
https://mcp.reletter.com streamable-http needs key 382 ms 1 min ago

Reletter — questions

Answers built from our own checks of this server.

Why is there no tool list for Reletter?
The server answered our handshake with an authorization challenge, so it is running — but it will not describe its tools to an anonymous client. To see them you need to connect with your own credentials. We record it as alive, not as broken: 100.0% of checks in the last 24 hours got a reply.
Is Reletter working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 7 of 7 checks got a reply (100.0%), average response time 279 ms. The bar chart above shows every period we have measured.
How do I connect Reletter?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address. You will need your own key or an OAuth login: it refuses anonymous clients.
Does Reletter need an API key?
Yes. Every time we knock, Reletter answers with an authorization challenge instead of its tool list — that is how we know it is running and gated rather than broken. Bring your own credentials and it will talk.
How fast is Reletter?
It answers our handshake in 279 ms on average, which is faster than 50% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.