WhatsApp API Error Codes: Complete Troubleshooting Guide
Common Message Delivery Errors (400-499)
Error 400 (Bad Request) typically indicates malformed JSON in your API call, validate your payload structure against the API schema. Error 404 means the recipient's phone number isn't registered on WhatsApp; verify the number format includes country code without leading zeros or plus signs. Error 429 (Rate Limited) occurs when you exceed your throughput limit. Uimplement exponential backoff and queue messages during high-volume sends. Error 470 indicates the message failed re-engagement restrictions. Uyou're trying to send a marketing template to someone who hasn't opted in or has opted out.
Template and Content Errors (130-136)
Error 130 indicates your message template was paused due to low quality. Ucheck your template analytics for high block or report rates and either improve the content or create a new template. Error 131 means the template wasn't found, verify the template name, language, and namespace match exactly. Error 132 indicates incorrect template parameters. Uensure you're passing the right number of variables in the correct order. Error 133 means the template was rejected during review, revise your content to comply with Meta's commerce and messaging policies, then resubmit. Always test templates with a small audience before scaling to catch quality issues early.
Webhook and Integration Errors (500-599)
Error 500 (Internal Server Error) from Meta's side is usually transient, retry after 30 seconds. If persistent, check Meta's status page for outages. Error 503 (Service Unavailable) indicates temporary capacity limits. Uimplement a retry queue with exponential backoff. Webhook delivery failures (your server returns non-200) cause Meta to retry with increasing intervals, eventually disabling your webhook after repeated failures. Monitor your webhook endpoint's response time. Uanything above 5 seconds risks timeout. Set up uptime monitoring and alerting for your webhook URL, and maintain a fallback server for high-availability deployments.
Debugging Best Practices
When troubleshooting WhatsApp API errors, follow this systematic approach. First, log the complete error response including the error code, error data, and message, partial logging is the #1 cause of extended debugging sessions. Second, check Meta's changelog for recent API updates that might have changed behavior. Third, test with the Graph API Explorer to isolate whether the issue is in your code or the API. Fourth, review your webhook logs for pattern recognition. If errors spike at specific times, the cause is usually rate limiting or capacity. SuperWaba's debug console shows real-time API logs with error highlighting, making troubleshooting 5x faster than raw API debugging.
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