Tag archive
A real use case: receive Nylas events by push instead of polling, and verify each one is genuine. Handle the challenge handshake, the webhook secret, and HMAC signatures with the API and CLI.
Your Stripe webhook returned 200 OK. That proves one useful but narrow fact: the endpoint...
The most dangerous failures don't look like failures. They return 200, they pass every check, and...
Verify Razorpay webhook signatures correctly: X-Razorpay-Signature is HMAC-SHA256 (hex) over the raw request body keyed with your webhook secret. The raw-body trap, the payment-signature mix-up, and working Node code.
A webhook provider sends an event. Your endpoint returns 200 OK. The provider stops...
Verify Square webhook signatures correctly: the x-square-hmacsha256-signature header signs the notification URL plus the raw body with HMAC-SHA-256, Base64-encoded. The URL trap, the raw-body trap, the deprecated SHA1 header, and working Node code.
A practical webhook security checklist to run before launch: raw-body signature verification, constant-time comparison, replay windows, secret handling, idempotency, and the delivery gap a security review usually misses.
We tested Hookdeck and EventDock side by side. Comparison table of pricing ($0 vs $29/mo), latency, DLQ, retries, and which is better for your stack.
Validate Twilio webhooks correctly: X-Twilio-Signature is an HMAC-SHA1 over the full URL plus sorted POST params keyed with your Auth Token. The URL-reconstruction trap behind proxies (X-Forwarded-Proto/Host), the SDK validator, and JSON bodySHA256.
Verify Slack requests correctly: the v0 HMAC-SHA256 over v0:timestamp:body, the X-Slack-Signature and X-Slack-Request-Timestamp headers, the raw-body trap, the 5-minute replay window, and how Slack disables event delivery after repeated failures.
How 5 providers sign webhooks, side by side, and the raw-body trap almost all share.
The Problem: Twilio Webhooks Won't Hit Your Localhost When you're building a Twilio...