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8 clients · secrets stay placeholders

JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

{
  "mcpServers": {
    "kestrel": {
      "type": "http",
      "url": "https://kestrel.perch-app.workers.dev/mcp"
    }
  }
}

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

[mcp_servers.kestrel]
url = "https://kestrel.perch-app.workers.dev/mcp"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "kestrel": {
      "type": "remote",
      "url": "https://kestrel.perch-app.workers.dev/mcp",
      "enabled": true
    }
  }
}

{
  "mcpServers": {
    "kestrel": {
      "type": "http",
      "url": "https://kestrel.perch-app.workers.dev/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=kestrel&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8va2VzdHJlbC5wZXJjaC1hcHAud29ya2Vycy5kZXYvbWNwIn0%3D"
}

{
  "servers": {
    "kestrel": {
      "type": "http",
      "url": "https://kestrel.perch-app.workers.dev/mcp"
    }
  }
}

{
  "mcpServers": {
    "kestrel": {
      "httpUrl": "https://kestrel.perch-app.workers.dev/mcp"
    }
  }
}

extensions:
  "kestrel":
    enabled: true
    name: "kestrel"
    type: streamable_http
    uri: "https://kestrel.perch-app.workers.dev/mcp"
    timeout: 300

Quality 79 / 100good

protocol75 · weight 25

warn
protocol.modernnewest supported version is 2024-11-05; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
n/a
protocol.statelessonly applies to 2026-07-28 servers
pass
protocol.transportstreamable HTTP
n/a
protocol.list_ttlonly applies to 2026-07-28 servers

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygiene71 · weight 30

pass
tools.descriptionsevery tool has a description
pass
tools.description_lengthdescriptions are concise
pass
tools.schemasevery tool has an object input schema
fail
tools.annotationsno tool declares readOnlyHint or destructiveHint, so clients cannot tell safe calls from risky ones
fail
tools.directory_hintsno tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: check_watch (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); delete_watch (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); create_watch (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); …
pass
tools.token_costabout 355 tokens to load every tool
pass
tools.api_dumptools are not a one-to-one API dump

stability100 · weight 15

pass
stability.changesno tool changes in 30 days
pass
stability.rug_pullno tool changed its meaning under the same name

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

4 tools, about 355 tokens to load them all · tool set b9d5a1b86282 · checked 2026-10-20 12:13 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 82 / 100

no-repository

provenance55

liveness99

freshness100

hygiene80

+dns-namespace +website +reachable +uptime-97% +updated-28d-ago -no-repository

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://kestrel.perch-app.workers.dev/mcp` streamable-http	none	yes	97%	138 ms	2024-11-05	2026-10-20

Tools (4)

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

Schemas: list_tools.

Similar MCP servers

Official server.json

{
  "name": "dev.workers.perch-app.kestrel/kestrel",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://kestrel.perch-app.workers.dev/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "1.0.0",
  "websiteUrl": "https://kestrel.perch-app.workers.dev",
  "description": "Watch any URL for changes: baseline, then check for a diff. Free, no signup/key."
}