AWS API Gateway
AWS managed API gateway service for creating, deploying, and managing REST, HTTP, and WebSocket APIs at scale, with built-in auth, throttling, caching, and AWS service integration.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
AWS-managed service with FedRAMP, PCI-DSS, HIPAA compliance. IAM SigV4 signing is robust. Multiple authorizer options for fine-grained access control. WAF integration available.
⚡ Reliability
Best When
You're building APIs on AWS infrastructure and need managed routing, auth, throttling, and deployment staging.
Avoid When
You need a non-AWS API gateway solution or your use case is too simple to warrant the configuration overhead.
Use Cases
- • Creating and managing REST or HTTP API facades for backend services
- • Building WebSocket APIs for real-time agent communication
- • Throttling and protecting backend endpoints with usage plans and API keys
- • Integrating Lambda functions as API handlers for agent tool endpoints
- • Connecting agents to AWS services via API Gateway as a proxy
Not For
- • Building the APIs that agents consume (API Gateway is for publishing APIs)
- • Non-AWS infrastructure teams
- • Very simple single-service APIs where direct Lambda function URLs suffice
Interface
Authentication
Multiple authorizer types: IAM SigV4, Cognito User Pools, custom Lambda authorizers, JWT authorizers, API keys with usage plans.
Pricing
Agent Metadata
Known Gotchas
- ⚠ REST API (v1) and HTTP API (v2) have different feature sets - HTTP API is cheaper but lacks usage plans
- ⚠ Changes to API configuration do not take effect until explicitly deployed to a stage
- ⚠ Integration timeouts (29s for REST, 30s for HTTP) can cause issues with slow backends
- ⚠ API keys are for identification, not authentication - don't rely on them for security alone
- ⚠ CORS must be explicitly configured; common source of agent integration failures
Alternatives
Full Evaluation Report
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Scores are editorial opinions as of 2026-03-07.