The 200 OK Trap: Why HTTP Status Codes Lie in API Integrations

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Last week I spent a solid six hours chasing a bug where user data from a payment gateway simply wasn't syncing to our dashboard. The integration code looked bulletproof: requests were being sent, and every single one returned an HTTP 200 OK. My initial instinct was to dig into the local network layer, assuming a timeout or a dropped packet, but the response time was instant. It wasn't until I added a raw response dump to the console that I saw the truth—every 200 response contained a JSON payload with success: false and a cryptic error_code: 9990. The hard lesson here is that a 200 status code

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