Hookden

Webhook capture bins for agents: get a URL, wait for webhooks, set replies, verify signatures.

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What it can do

    What data it sees

    Do you need an account

    No: the server works without sign-in

    Webhook capture bins for agents: get a URL, wait for webhooks, set replies, verify signatures.

    How to connect

    How to connect Hookden to Claude

    The server address to paste into Claude settings:

    https://hookden.pages.dev/mcp

    1. Open Claude (claude.ai or the desktop app).
    2. Go to Settings → Connectors.
    3. Click Add custom connector.
    4. Paste the server address copied below into Remote MCP server URL and click Add.
    5. In a chat, click + → Connectors and switch the new connector on.

    Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

    Authorization

    After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

    How to connect Hookden to ChatGPT

    The server address to paste into ChatGPT settings:

    https://hookden.pages.dev/mcp

    1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
    2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
    3. Open Settings → Connectors and click Create.
    4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
    5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
    6. In a new chat open + → Apps/Connectors and enable the connector.

    OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

    Authorization

    On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

    How to connect Hookden to Cursor

    The server address to paste into Cursor settings:

    https://hookden.pages.dev/mcp

    Fastest: click Open in Cursor below and confirm the prompt.

    Manually:

    1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
    2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
    3. Save the file. The server appears in the MCP list; authorize it there if asked.

    Authorization

    If the service needs sign-in, an authorize button appears next to the server in the MCP list.

    Server tool list (7)

    Raw names from tools/list. Only developers need these.

    create_binCreate a new webhook capture bin. Returns a public capture_url — point any webhook (Stripe, GitHub, Slack, your own service…) at it and every request sent there (any method, any subpath, headers + raw body) is stored. Then read what arrived with list_captures, get_capture, or wait_for_capture. Anonymous bins keep requests ~24h. No auth needed.
    list_capturesList requests captured by a bin, oldest first. Compact summaries (id, method, path, time, content-type, body size, signature status). Use get_capture for full headers/body. Pass `after` (a capture id) to only see newer captures.
    get_captureGet one captured request in full: method, path, query, every header, and the body. Binary bodies are returned base64-encoded (up to 8KB, with a URL for the raw bytes).
    wait_for_captureBlock until the next request arrives at a bin (or a timeout passes), then return it in full. Ideal flow: create_bin → configure the webhook sender → trigger it → wait_for_capture. If `after_id` is omitted, waits for the next capture after "now". Returns timed_out:true instead of erroring when nothing arrives.
    send_test_webhookSimulate a webhook delivery into a bin — no external sender or HTTP client needed. Seeds one realistic, clearly-labeled sample capture (default: a GitHub push event) and returns it in full, so you can exercise the whole loop (create_bin → send_test_webhook → list_captures / get_capture) entirely from MCP. Pass `example` to pick a provider payload from the /examples library (e.g. "stripe-payment-intent-succeeded", "slack-event-callback", "shopify-order-created"). Sample captures are marked as simulated and never count as real webhook traffic.
    set_responseConfigure what a bin replies to webhook senders: HTTP status, content-type, body, custom response headers, optional delay. Body and header values support {{…}} templates rendered per-request from the INCOMING delivery — {{body.challenge}}, {{query.hub.challenge}}, {{header.x-hook-secret}}, {{hmac_sha256 body.plainToken YOUR_SECRET}} — so a bin can pass provider verification handshakes with zero code: Slack URL verification (body {{body.challenge}}), Zoom CRC (JSON with the hmac_sha256 helper), Meta/WhatsApp GET echo (text/plain {{query.hub.challenge}}), Strava (JSON {"hub.challenge":"{{query.hub.challenge}}"}), Asana (response header X-Hook-Secret: {{header.x-hook-secret}}). Only the fields you pass change; everything else keeps its current value. Works on bins created via create_bin by this same client; the incoming request is still captured in full either way.
    verify_signatureVerify a webhook signature against a secret — 25 provider-exact schemes plus a generic HMAC mode, the same engine that computes ✓/✗ badges on captures. Covers HMAC-SHA256 (GitHub, Stripe, Svix/Standard Webhooks, Shopify-style base64, URL-signing Square/HubSpot/Trello…), ECDSA (SendGrid), RSA (Kick) and HMAC-MD5 (Patreon). Pass the scheme, the secret, the delivery's headers, and the BYTE-EXACT raw body (body_base64 for binary). The secret is used only for this one in-memory computation — never stored or logged. No bin needed. If verification fails, the #1 cause is a re-serialized body: point the real webhook at a capture bin (create_bin) to get the true raw bytes first.