48-hour launch: 40% off with code LAUNCH40, Guide $5.40 / Kit $11.40

Stripe webhook signature failing? Find out why.

Paste the payload, the Stripe-Signature header and your whsec_ secret. The free checker runs in your browser, checks the signature, and points to the likely cause, such as a re-serialized body, the wrong secret or an old timestamp.

Open the free Stripe signature checker →

Self-Hosted Webhook Relay Kit ($19): a Cloudflare Worker relay with retries, replay and a dead-letter list. It verifies Stripe, Shopify, Paddle Billing, Square, Twilio (status callbacks), Lemon Squeezy and GitHub out of the box.

Fix Your Stripe Webhooks guide · Self-Hosted Webhook Relay Kit. Code LAUNCH40 = 40% off until Sun Oct 11, 6:40 AM MT.

Most common Stripe webhook errors

“No signatures found matching the expected signature for payload” “Timestamp outside the tolerance zone” Stripe webhook 400 in Next.js (App Router and Pages Router)

Never miss a Stripe payment alert

Stripe events go straight to your Discord channel and a Google Sheet. If either one is down, we hold the event and keep retrying until it gets through.

Stripe signature checked on every event
Automatic retries with backoff, plus a list of failed events you can replay
Covers checkout completed, invoice paid, payment failed, and refunds
No code and no server needed

Hosted alerts: coming soon

Meanwhile, grab the free Webhook debugging cheat sheet.

Want to host it yourself instead? It's free and runs on Cloudflare Workers.

Debugging signatures? Get every fix in the Fix Your Stripe Webhooks guide ($9).