kestrel
Watch any URL for changes: baseline, then check for a diff. Free, no signup/key.
使うべきか
品質と安全性
ツール定義とプロトコルへの準拠に関する自動分析に基づいています。
コンテキストコスト
これは、サーバーのツールがモデルのコンテキストに読み込まれるたびに消費されるおおよそのトークン数です。数が多いほど、ほかのタスクに使える注意が減ります。
インストール
ワンクリックインストール
これを `claude_desktop_config.json` ファイルに追加してください:
{
"mcpServers": {
"kestrel": {
"url": "https://kestrel.perch-app.workers.dev/mcp"
}
}
}リモートエンドポイント
https://kestrel.perch-app.workers.dev/mcpstreamable-httpできること
ツール一覧
ツール（4）
🟡create_watch(url, label, token)
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.
入力スキーマ
{
"type": "object",
"properties": {
"url": {
"type": "string",
"description": "Absolute http(s) URL to monitor, e.g. https://example.com/pricing"
},
"label": {
"type": "string",
"description": "Optional human label for this watch."
},
"token": {
"type": "string",
"description": "Optional. Your existing Kestrel token to group this watch with others. Omit to get a new token."
}
},
"required": [
"url"
]
}🟢check_watch(watch_id, token)
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).
入力スキーマ
{
"type": "object",
"properties": {
"watch_id": {
"type": "string"
},
"token": {
"type": "string",
"description": "The token returned by create_watch."
}
},
"required": [
"watch_id",
"token"
]
}🟢list_watches(token)
List all watches under your token, with per-watch check/change counts.
入力スキーマ
{
"type": "object",
"properties": {
"token": {
"type": "string"
}
},
"required": [
"token"
]
}🔴delete_watch(watch_id, token)
Stop monitoring a page and delete the watch.
入力スキーマ
{
"type": "object",
"properties": {
"watch_id": {
"type": "string"
},
"token": {
"type": "string"
}
},
"required": [
"watch_id",
"token"
]
}コミュニティ
エビデンス