Google Cloud API Gateway

Plans and prices

Every plan, in full

On the record

AI agent integration

Public Preview MCP support lets API Gateway expose existing REST APIs to AI agents as tools without backend changes.docs.cloud.google.com · read 1 Oct 2026

API specifications

API Gateway supports OpenAPI 2.0 and OpenAPI 3.0 specifications, including all OpenAPI 3.0 patch versions.docs.cloud.google.com · read 1 Oct 2026

Authentication

Supported authentication mechanisms include API keys, Google authentication methods, and Google ID tokens.docs.cloud.google.com · read 1 Oct 2026

Backend integrations

Documentation describes integrations with Cloud Run, Cloud Run functions, and App Engine backends.docs.cloud.google.com · read 1 Oct 2026

Encryption and residency

Customer data in API Gateway is CMEK-compliant at rest, and the service meets regulatory and compliance requirements for data residency at rest.docs.cloud.google.com · read 1 Oct 2026

Google Cloud integration

API Gateway is natively integrated with Google Cloud and handles traffic management, authorization, and monitoring for concurrent API calls.docs.cloud.google.com · read 1 Oct 2026

Management

It is a distributed API management system providing hosting, logging, monitoring, and API security features.docs.cloud.google.com · read 1 Oct 2026

Model routing

Public Preview model routing accepts OpenAI-compatible prompts and routes them to Gemini, Anthropic Claude, and OpenAI GPT models in Model Garden.docs.cloud.google.com · read 1 Oct 2026

Payload limits

Maximum request and response payload sizes are 32 megabytes, while gRPC transcoding requests and responses are limited to 1 megabyte.docs.cloud.google.com · read 1 Oct 2026

Purpose

API Gateway provides secure access to backend services through a consistent REST API regardless of service implementation.docs.cloud.google.com · read 1 Oct 2026

Resource limits

The documented limits are 50 APIs total, 100 API configs per API, and 50 gateways per region.docs.cloud.google.com · read 1 Oct 2026

Security transport

API Gateway enforces TLS 1.2 or later for new security settings.docs.cloud.google.com · read 1 Oct 2026

Support resources

Google Cloud documentation lists community forums, support, release notes, and system status resources for API Gateway users.docs.cloud.google.com · read 1 Oct 2026

Unsupported backend

API Gateway does not support proxying to other Google Cloud APIs such as BigQuery APIs.docs.cloud.google.com · read 1 Oct 2026

Usage observability

API Gateway logs request and response information and tracks latency, traffic, and errors.docs.cloud.google.com · read 1 Oct 2026

Alternatives to Google Cloud API Gateway

H HigressWebWindows+4 AA Amazon API GatewayAndroidiPhone & iPad+2 TG Tyk GatewayWebLinux+2 GC Google Cloud EndpointsWebMac+3 KG Kong GatewayWebLinux+2 GA Gravitee API GatewayWebWindows+3 TC Tencent Cloud API GatewayWebAPI KA KrakenD API GatewayWindowsMac+2

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