Longwatch MCP MCP server

Longwatch provides a monitoring API for intermittent AI agents, allowing them to poll public sources for changes even when offline. It supports website change detection, RSS/Atom feed monitoring, crypto price alerts, and SEC filing tracking via a cursor-based system.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by CoinOp

MCP endpoint (Streamable HTTP)

https://longwatch.dev/mcp

Vendor documentation

What you can do with it

Monitor public websites for content changes
Track unseen RSS and Atom feed items
Alert on crypto price threshold crossings
Track new SEC 8-K and Form 4 filings

Tools advertised by the last live check:

check_now
create_watch
check_web_page
watch_web_page
check_rss_feed
watch_rss_feed
check_crypto_price
watch_crypto_price
check_sec_filings
watch_sec_filings
check_insider_trades
watch_insider_trades
check_x402_endpoint
watch_x402_endpoint
poll_alerts
try_watch
poll_trial
delete_watch

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http longwatch-mcp https://longwatch.dev/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add longwatch-mcp --url https://longwatch.dev/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable longwatch-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "longwatch-mcp": {
      "url": "https://longwatch.dev/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "longwatch-mcp": {
      "type": "streamableHttp",
      "url": "https://longwatch.dev/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start longwatch-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "longwatch-mcp": {
      "type": "http",
      "url": "https://longwatch.dev/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http longwatch-mcp https://longwatch.dev/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "longwatch-mcp": {
      "url": "https://longwatch.dev/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "longwatch-mcp": {
      "serverUrl": "https://longwatch.dev/mcp"
    }
  }
}

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