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, and free tier support across all AWS regions.

+4 more

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's included in the API Gateway Free Tier?

The AWS Free Tier includes 1 million REST API calls, 1 million HTTP API calls, 1 million WebSocket messages, and 750,000 connection minutes per month for the first 12 months. This calculator automatically deducts free tier usage when enabled.

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.

Related tools you might like

RDS Pricing Calculator - All Database Engines

Free RDS pricing calculator for MySQL, PostgreSQL, MariaDB, Oracle, SQL Server. Estimate costs with storage, IOPS, Multi-AZ, and Reserved Instances.

S3 Pricing Calculator - Compare All Storage Classes

S3 pricing calculator to compare costs across all storage classes. Estimate monthly AWS S3 costs by region with automatic cost optimization recommendations.

Tip

Stop AWS bill surprises from happening.

Most infrastructure changes look harmless until you see next month's AWS bill. CloudBurn prevents this by analyzing the cost impact of your AWS CDK changes directly in GitHub pull requests, catching expensive mistakes during code review when fixes are quick, not weeks later when they're costly and risky.

Install CloudBurnShow Features

See the setup guide to get started.

← Back to tools