MCP HeartbeatTHE MCP OBSERVATORY
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Evidence for your next connection.

Independent measurements of remote MCP servers. Every observation has a timestamp.

Read-only probes

Bring the evidence to your agent

Connect MCP Heartbeat

MCP Heartbeat is a remote Streamable HTTP server at https://mcpheartbeat.com/mcp. No account. The MCP endpoint allows 60 calls per minute per hashed IP. The JSON API keeps a separate limit of 100 calls per UTC day.

Claude Desktop

Add a remote server in claude_desktop_config.json. The key is mcpServers and the value is the URL.

claude_desktop_config.json

{
  "mcpServers": {
    "mcp-heartbeat": {
      "url": "https://mcpheartbeat.com/mcp"
    }
  }
}

Claude Code

Checked against the Claude Code MCP docs: claude mcp add --transport http <name> <url>.

Terminal

claude mcp add --transport http mcp-heartbeat https://mcpheartbeat.com/mcp

Cursor

Checked against Cursor's MCP docs. Put this in .cursor/mcp.json or in ~/.cursor/mcp.json. A remote server is a url.

.cursor/mcp.json

{
  "mcpServers": {
    "mcp-heartbeat": {
      "url": "https://mcpheartbeat.com/mcp"
    }
  }
}

VS Code

Checked against the VS Code MCP configuration reference. The workspace file .vscode/mcp.json uses a top-level servers object and "type": "http".

.vscode/mcp.json

{
  "servers": {
    "mcp-heartbeat": {
      "type": "http",
      "url": "https://mcpheartbeat.com/mcp"
    }
  }
}

Generic config

Any client that speaks remote Streamable HTTP can use this block. There is no API key.

mcp.json

{
  "mcpServers": {
    "mcp-heartbeat": {
      "type": "http",
      "url": "https://mcpheartbeat.com/mcp"
    }
  }
}

Claude and ChatGPT apps

In the app settings, add a custom connector and paste https://mcpheartbeat.com/mcp.

Example prompts

  • Find MCP servers for web search. Compare their latest measurements and show when each was checked.
  • Find a database tool. Show its input schema, publisher, and any measurements that are missing.
  • Before I connect, check the server health and recent tool-list changes. Cite the measurement timestamps.