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Kestrel

dev.workers.perch-app.kestrel/kestrel · v1.0.0

Watch any URL for changes: baseline, then check for a diff. Free, no signup/key.

Connect Remote server

Terminal
claude mcp add --transport http kestrel https://kestrel.perch-app.workers.dev/mcp
~/.cursor/mcp.json
{
  "mcpServers": {
    "kestrel": {
      "url": "https://kestrel.perch-app.workers.dev/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "kestrel": {
      "type": "http",
      "url": "https://kestrel.perch-app.workers.dev/mcp"
    }
  }
}
Claude Desktop
Settings > Connectors > Add custom connector
URL: https://kestrel.perch-app.workers.dev/mcp

Tools 4 found in our last check

  • create_watch

    Start monitoring a web page (or JSON/text URL) for changes. Captures a baseline snapshot now. Returns a watch_id and a token — save the token; it's how you check and manage your watches later. Pass an existing token to add more watches under the same account.

  • check_watch

    Re-fetch a watched page and report whether it changed since the last check, with a short list of added/removed content lines. Updates the baseline to the new content. Call this every time you want the latest status (e.g. each run/heartbeat).

  • list_watches

    List all watches under your token, with per-watch check/change counts.

  • delete_watch

    Stop monitoring a page and delete the watch.

Details

Endpointhttps://kestrel.perch-app.workers.dev/mcp (Streamable HTTP)
First published22 Sep 2026
Last updated22 Sep 2026
Registry namedev.workers.perch-app.kestrel/kestrel

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