How to Resolve Stripe Webhook Signature Verification Failures in Node.js Deployments

This article addresses a common issue encountered when integrating Stripe webhooks in a Node.js backend: signature verification failures during production deployments. The author describes how, despite correct raw body handling and accurate endpoint URLs, Stripe returned signature verification errors in production, even though everything worked locally with the Stripe CLI. The root cause was the use of the Test Mode webhook signing secret in a production environment where Stripe was sending Live Mode events. Since Stripe signs test and live events with different secrets, using the wrong secret will always cause verification to fail, regardless of code correctness. The author resolved the problem by updating environment variables and Stripe initialization code to distinguish between test and live modes, ensuring the correct secret is used in each environment. The article also offers a tip for local testing using the Stripe CLI and emphasizes the importance of matching secrets to the environment. The key takeaway is to double-check your webhook secret and environment configuration to avoid hours of unnecessary debugging. This practical guide is valuable for developers integrating Stripe, helping them avoid a subtle but impactful deployment pitfall.