Kestrel MCP Server

by workers-perch-app-kestrel Your server? Claim it

answering

Kestrel is answering right now. Last checked 14 min ago. It exposes 4 tools.

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

Uptime history 47 days of history · worst day 77%

47 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

98 ms

Response time

average over 24h

open, no key

Access

streamable-http

Nothing serious here today

Today is the operative word: we check Kestrel 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 14 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add kestrel --transport http https://kestrel.perch-app.workers.dev/mcp

Settings → Connectors → Add custom connector, then paste this address

https://kestrel.perch-app.workers.dev/mcp

~/.codex/config.toml

[mcp_servers.kestrel]
url = "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"
    }
  }
}

Available tools 4

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

watch

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).

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.

delete_watch

Stop monitoring a page and delete the watch.

watches

list_watches

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

Endpoints

URL	Transport	State	Latency	Checked
https://kestrel.perch-app.workers.dev/mcp	streamable-http	answering	100 ms	14 min ago

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Kestrel — questions

Answers built from our own checks of this server.

What can Kestrel do?

It exposes 4 tools, read directly from the server on our last check. Among them: check_watch, create_watch, delete_watch, list_watches. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Kestrel working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 98 ms. The bar chart above shows every period we have measured.

How do I connect Kestrel?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Kestrel need an API key?

No. Kestrel completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 4 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Kestrel?

It answers our handshake in 98 ms on average, which is faster than 93% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.