FalconHook is currently in beta. For any feedback, questions or issues, please feel free to reach us at contact@falconhook.com.

Watching MainNet blocks

Webhooks for Algorand

Define rules for the transactions you care about. FalconHook watches every block and sends a signed HTTP POST to your endpoint when something matches.

Create your account Documentation

POST https://your-app.com/webhook

{
  "event_type": "transaction",
  "rule_name": "large-usdc-transfers",
  "network": "mainnet",
  "round": 44821037,
  "timestamp": "2026-03-28T14:22:07Z",
  "payload": {
    "id": "GKPT5B...",
    "type": "axfer",
    "sender": "ALGO3X...",
    "receiver": "7YNQA2...",
    "asset_id": 31566704,
    "amount": 250000000
  }
}

Every delivery includes an HMAC-SHA256 signature so you can verify it came from FalconHook.

What you get

Signed payloads

HMAC-SHA256 signature on every delivery so you can verify authenticity with a single function call.

Automatic retries

Failed deliveries retry with configurable exponential backoff. Dead-letter queue for inspection and replay.

Sub-second latency

Block finalized → rule matched → webhook delivered. The whole pipeline runs in memory, not on a cron.

Flexible rules

Filter by sender, receiver, asset ID, app ID, transaction type, or minimum amount. Combine any way you want.

Handle webhooks in any language

FalconHook sends standard HTTP POST requests with JSON bodies. If your stack can receive an HTTP request, it works with FalconHook.

Full transaction details in every payload
Signature header for verification
Idempotency key to prevent duplicate processing
Automatic retries on 4xx / 5xx with backoff

webhook_handler.py

@app.post("/webhook")
async def handle(request: Request):
    body = await request.body()
    sig = request.headers["X-FalconHook-Signature"]

    # Verify HMAC signature
    verify_signature(body, sig, SECRET)

    event = await request.json()
    print(f"Tx {event['payload']['id']}"
          f" round {event['round']}")

    return {"ok": True}

Start building

Create your account and start receiving webhooks in minutes. No credit card required.

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