EVOTECH digital · custom software · APIs & Integrations

API Reliability & Rate Limiting

Retries, rate-limit handling, and real error handling so your integrations recover from hiccups instead of silently dropping data.

5.0· 14 Google reviews

Why integrations fail quietly

Third-party APIs go slow, return 429s, time out, or have brief outages — that's normal. The problem is when your integration treats every one of those as a hard failure, loses the record, and nobody notices until a customer complains.

We make your integrations resilient to the ordinary flakiness of the internet, so a temporary blip doesn't turn into missing orders, unsent emails, or a stalled sync.

  • Exponential backoff with jitter on retryable errors and timeouts
  • Respect for the provider's rate-limit headers and Retry-After signals
  • Idempotency keys so a retry never double-charges or double-creates
  • Circuit breakers that back off cleanly when a dependency is down
  • Dead-letter queues so a failed item is parked for review, not lost

Know it broke before your customer does

Reliability isn't just retries — it's visibility. If a sync has been failing for six hours, you want an alert, not a surprise. We add the monitoring and logging that turn a silent failure into a fixable notification.

We also separate errors that should be retried from errors that never will (a bad request won't fix itself), so your system spends its effort where it helps.

  • Alerting when failure rates or queue backlogs cross a threshold
  • Structured logs of decisions and outcomes (without dumping sensitive payloads)
  • Clear split between retryable (429, 503, timeout) and permanent (400, 401) errors
  • Timeouts and concurrency limits so one slow dependency can't stall everything
  • Reconciliation checks to catch anything that slipped through

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Frequently asked questions

Our integration 'mostly works' — is this worth doing?

If it mostly works, the failures are just invisible right now. The question is what happens to a record when the call fails — is it retried, parked, or gone? If you can't answer that, a reliability pass is usually cheaper than the trust you lose when data quietly goes missing.

What's an idempotency key and why do I care?

It's a unique tag on a request so that if it's retried after a timeout, the other system recognizes it and doesn't process it twice. Without it, retries can create duplicate invoices, orders, or charges. It's one of the most important safeguards in a reliable integration.

Can you harden an integration someone else built?

Usually yes. We review where calls happen, add retry and backoff logic, introduce a queue if needed, and put monitoring around it. We'll tell you honestly if the existing design needs restructuring versus a targeted fix.

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