API Gateway Pricing Calculator - HTTP, REST, WebSocket APIs
API Gateway pricing calculator for HTTP APIs, REST APIs, and WebSocket APIs. Estimate monthly costs with caching, data transfer, VPC endpoints, across all AWS regions.
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Frequently Asked Questions
What is the difference between HTTP APIs and REST APIs?
HTTP APIs are up to 71% cheaper and optimized for serverless workloads with Lambda/HTTP backends. They support JWT authorization and CORS. REST APIs offer full API management including caching, request validation, API keys, usage plans, and AWS WAF integration. Choose HTTP APIs for simple proxies, REST APIs for enterprise features.
How is WebSocket API pricing calculated?
WebSocket APIs charge for messages ($1.00 per million) and connection minutes ($0.25 per million). Messages are metered in 32 KB increments, so a 33 KB message counts as two. Connection minutes are the total time all clients are connected. For a chat app with 1000 users connected 12 hours daily, expect ~21.6M connection minutes/month.
How are API requests metered?
HTTP APIs are metered in 512 KB request increments. A 600 KB request counts as 2 billable requests. REST APIs with Response Streaming are metered in 10 MB response payload increments. A 65 MB response counts as 7 billable requests. Standard REST APIs charge per request regardless of size.
When should I use API Gateway caching?
Caching is available for REST APIs and charges hourly by size (from $0.02/hr for 0.5 GB to $3.80/hr for 237 GB). Use caching when your backend responses are cacheable and you want to reduce latency and backend load. For a 1.6 GB cache running 24/7, expect ~$27/month. Caching is not available for HTTP APIs or WebSocket APIs.
What are the costs for Private REST APIs?
Private REST APIs are only accessible within your VPC via AWS PrivateLink. In addition to standard REST API call charges, you pay for the VPC endpoint: $0.01/AZ/hour (about $7.30/month per AZ) plus $0.01/GB data processed. Factor in these costs when designing internal APIs.
What are API Gateway Portals?
API Gateway Portals provide developer-facing documentation and self-service API access. Each Portal costs $125/month and includes 10 PortalProducts. Additional products are $12.50/month each. Costs are prorated based on usage within the month.
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