Webhook Debugging: Stop Blaming Stripe, Check Your Own Code
Most webhook failures aren't Stripe's fault. I've spent weeks debugging payment integrations. Here's what actually breaks.
I've inherited enough broken payment systems to know: when webhooks fail, developers panic and blame the payment provider first. Wrong move.
In the last year alone, I've debugged Stripe integrations for three different clients. Every single time, the issue was on their side. Not once was it Stripe.
Here's what I actually found:
Signature verification breaks everything. Your webhook endpoint validates the request signature against Stripe's public key. If you're using an old library version or you misconfigured the signing secret, you'll reject legitimate webhooks silently. The request arrives. Your code says "nope, fake." Stripe never knows it failed. You don't either until customers complain.
Staging vs live keys destroy deployments. I watched a client deploy to production with staging Stripe keys still hardcoded. Webhooks came through, hit the wrong endpoint, got rejected. They spent two days thinking Stripe changed something. The keys were wrong.
Idempotency saves your ass. Webhooks can fire multiple times. If your code doesn't handle duplicate charge.succeeded events, you'll create duplicate orders or double-charge. I now treat every webhook handler as potentially running twice. Upsert, don't insert. Check if the transaction exists first.
Log everything aggressively. Every webhook request, every signature check, every database write. When debugging payment issues, logs are your only source of truth. Stripe's dashboard shows what they sent. Your logs show what you did with it. The gap between them is your bug.
Webhook delivery is eventual. Stripe doesn't guarantee immediate delivery. Events can arrive out of order. A charge.succeeded might arrive before charge.captured. Build your handlers to be idempotent and order-agnostic.
My approach now: write webhook handlers like they're unreliable by default. Verify everything. Log everything. Never trust timing. Test with Stripe's CLI webhook relay before deploying. It catches 90% of issues in development.
Stop debugging in production. Stop blaming Stripe. Build correctly from the start.