Why API Webhook Payloads Should Be Signed Not Verified

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Why API Webhook Payloads Should Be Signed Not Verified

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Episode 88 of The Developer Tools Podcast with Fexingo dives into a common blind spot in webhook security: signature validation. Lucas and Luna dissect how most developers treat webhook verification as a checkbox rather than a chain of trust, using the 2024 Twilio breach as a concrete example. They walk through why HMAC-based signatures alone aren't enough, how replay attacks exploit timestamp gaps, and why envelope encryption keys should rotate per webhook endpoint. The hosts also compare approaches from Stripe, GitHub, and Slack, showing where each falls short. By the end, you'll understand why webhook payloads should carry a signed digest of the event data, not just a verification token. Perfect for engineers building integrations or maintaining event-driven systems. #WebhookSecurity #APIDesign #DevTools #Infrastructure #SoftwareEngineering #Cryptography #HMAC #EventDriven #TwilioBreach #StripeAPI #GitHubAPI #SlackAPI #ReplayAttack #PayloadSigning #EndpointSecurity #BusinessAndTechnology #FexingoBusiness #BusinessPodcast Keep every episode free: buymeacoffee.com/fexingo

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