The Developer Tools Podcast with Fexingo · 2026-07-14 · 9 min
Episode 110 of The Developer Tools Podcast dives into silent API failures - the bugs that don't throw 500s but corrupt data or degrade user experience silently. Lucas and Luna explore a case from a fintech startup that lost $50,000 in a single weekend because their payment API accepted duplicate webhooks without error. They break down why traditional uptime monitoring misses these failures, how to build contract tests that validate behavior not just status codes, and why the best alert is not a 5xx spike but a subtle shift in response-time distribution. Specific strategies include using consumer-driven contract testing (CDCT) with tools like Pact, embedding semantic monitoring in CI/CD, and measuring 'correctness' SLIs alongside latency and error rate. No fluff - just practical engineering for teams that want their APIs to fail loudly when they break. #SilentFailures #APIMonitoring #ContractTesting #Pact #CDCT #SemanticMonitoring #WebhookReliability #Fintech #APIErrorHandling #ServiceLevelIndicators #CorrectnessSLI #DeveloperTools #Business #Technology #FexingoBusiness #BusinessPodcast #DevToolsPodcast #APIEngineering Keep every episode free: buymeacoffee.com/fexingo
Other episodes covering the same guests and topics, from across The B2B Podcast Index.
Why Your API Should Support Cursor PaginationWhy Your API Should Use Long Polling for Real-Time UpdatesWhy Your API Needs a Backward-Compatible Versioning StrategyHow to Sell Your API to a Billion-Dollar PlatformWhy Your API Needs a Webhook Signature Verification
