API Gateway Cost Calculator

Model AWS API Gateway monthly cost from request volume, payload size, and API type (HTTP, REST, or WebSocket).

Estimate monthly AWS API Gateway request + data transfer costs for HTTP APIs and REST APIs (us-east-1 list pricing model).

API type Requests / month millions Avg response payload KB Data transfer out price $/GB WebSocket message count / month millions WebSocket connection-minutes / month millions

Uses simplified public price points: HTTP API $1.00/M requests, REST $3.50/M, WebSocket $1.00/M messages + $0.25/M connection-minutes. Free tier and regional discounts are not applied — check AWS Pricing Calculator for quotes.

HTTP vs REST vs WebSocket

Type	Best for	Cost posture
HTTP API	JWT/Lambda proxy APIs	Usually lowest per-request price
REST API	API keys, usage plans, request validation	Higher per-request price
WebSocket	Chat, notifications, live feeds	Connection-minutes often dominate

Cost Levers

Prefer HTTP APIs when you do not need REST-only features.
Shrink JSON payloads and enable compression at the edge where possible.
Put CloudFront in front for cacheable GETs to cut origin/API calls.
Watch WebSocket connection-minutes for always-on mobile clients.

Prices in this tool are simplified public list-style numbers for planning — confirm with the AWS Pricing Calculator for your region and tier.