Resilient API Calls
Keep API integrations working in production: classify failures, bound retries, pace shared rate limits, watch credits and make every replay safe.
Resilient API Calls badgeComplete all 4 lessons to earn it. About 2.8 hours.
0 of 4 lessonsStart course
What you'll be able to do
- Classify transport, HTTP, envelope and per-item failures and map each to one action
- Bound retries with an overall deadline, a retry budget, full jitter and Retry-After
- Stop a failing upstream from eating credits and latency with a circuit breaker
- Pace many workers under one per-minute limit and stop cleanly before credits run out
- Make queue consumers idempotent with operation-derived keys and the outbox pattern
This course is one of three skill areas on exam APV-300, APIVerve Certified Engineer: Production Integrations: 10 of its 30 questions. See the full path
Syllabus
- Classify API errors and failuresStart hereClassify API failures in production: transport, HTTP status, envelope and per-item batch errors, each mapped to one action in a typed error hierarchy.
- Retry budgets and circuit breakersBound retries in production: an overall deadline, a retry budget, full jitter as a pure function, Retry-After in seconds or HTTP-date, and a circuit breaker.
- Rate limits and credits at scalePace a per-minute API limit with a token bucket, share one limit across workers and processes, read credit headers, and alert before credits run out.
- Idempotency and safe replaysMake API work safe to replay: at-least-once queues, idempotent consumers, dedupe keys derived from the operation, the outbox pattern, and when keys are needed.