Do I need an API gateway to handle retries and failover?

Not necessarily.

An API gateway can help with retries, failover, rate limiting, auth, and routing, but it’s not required just to handle retries and failover.

Use an API gateway if:

• You want a central place to manage cross-cutting concerns
• You have many clients/services and want consistent behavior
• You need traffic steering, canary releases, circuit breaking, or regional failover
• You want to hide backend complexity from clients

You may not need one if:

• You have a small system
• Retries/failover can be handled by the client SDK or service-to-service library
• Your infrastructure already provides it, e.g.:
  • Load balancers
  • Service mesh (like Istio/Linkerd)
  • Cloud provider managed APIs or ingress controllers
• You want to avoid the extra latency, cost, and operational complexity

Important note on retries

Retries are tricky:

• Only retry idempotent operations unless you have deduplication
• Use timeouts, backoff, and jitter
• Avoid “retry storms” that make outages worse

Failover

Failover is often better handled by:

• DNS / global traffic manager
• Load balancers
• Multi-region architecture
• Service mesh / client-side discovery

Rule of thumb

• If you need API management features, a gateway is useful.
• If you only need retry/failover, first consider whether a client library, load balancer, or service mesh is enough.

If you want, I can help you decide based on your setup (cloud provider, number of services, sync vs async, multi-region or not).