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Pix via API: best practices for real-time reconciliation
Webhook patterns, idempotency, and event handling.
Pix (Brazil's instant payment system) changed how we reconcile payments: instead of batch files, we work with real-time events via webhooks.
Idempotency
Always handle each event with a unique key (endToEndId). Webhooks can be redelivered, and your system needs to absorb duplicates without double-counting.
Redelivery and queueing
- Respond 2xx quickly and process asynchronously.
- Implement retry with exponential backoff.
- Keep an auditable log of every event received.
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