Estimate your REST API infrastructure costs including compute servers, database, CDN, bandwidth, and monitoring. Plan your tech stack budget accurately.
Configure your infrastructure to see cost estimates
The largest cost driver. Consider auto-scaling to handle variable traffic without paying for idle capacity. Reserved instances (1-3 year commitments) save 30-70% vs on-demand. Serverless (Lambda, Cloud Run) can be more economical for low/spiky traffic.
Usually the 2nd biggest expense. Read replicas improve performance but add cost. Connection pooling (PgBouncer, RDS Proxy) reduces connection overhead. Multi-region replication costs 2-3× single region. Consider caching (Redis) to reduce DB load.
Egress (outbound) bandwidth is typically charged; ingress is free. CDN reduces origin server load and latency. For APIs serving large payloads globally, CDN can reduce bandwidth costs by 50-80%. Compress responses with gzip/brotli to minimize bandwidth usage.
Common questions about API Cost calculations
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