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Summary

Local JWT validation is fast until revocation lags bite you. When to introspect at Cognito, use API Gateway JWT authorizers, and add Verified Permissions for fine-grained authz.

Key Facts

  • • When to introspect at Cognito, use API Gateway JWT authorizers, and add Verified Permissions for fine-grained authz
  • • Amazon Cognito (June 2026) issues JWT access tokens—validate locally with JWKS ( ) for latency
  • • Introspection (RFC 7662) hits the authorization server each request—slower but immediate revocation awareness if the AS supports it
  • • AWS wiring - HTTP API JWT authorizer — , from Cognito pool - Lambda authorizer — custom claims, Cedar via Verified Permissions - mTLS — separate track for B2B What to do this week 1
  • • Enable Cognito token revocation API where required

Entity Definitions

Lambda
Lambda is an AWS service discussed in this article.
IAM
IAM is an AWS service discussed in this article.
API Gateway
API Gateway is an AWS service discussed in this article.

Related Content

OAuth2 Token Introspection vs JWT Validation on Cognito and API Gateway

Cloud Architecture Palaniappan P 1 min read

Quick summary: Local JWT validation is fast until revocation lags bite you. When to introspect at Cognito, use API Gateway JWT authorizers, and add Verified Permissions for fine-grained authz.

Key Takeaways

  • When to introspect at Cognito, use API Gateway JWT authorizers, and add Verified Permissions for fine-grained authz
  • Amazon Cognito (June 2026) issues JWT access tokens—validate locally with JWKS ( ) for latency
  • Introspection (RFC 7662) hits the authorization server each request—slower but immediate revocation awareness if the AS supports it
  • AWS wiring - HTTP API JWT authorizer — , from Cognito pool - Lambda authorizer — custom claims, Cedar via Verified Permissions - mTLS — separate track for B2B What to do this week 1
  • Enable Cognito token revocation API where required
OAuth2 Token Introspection vs JWT Validation on Cognito and API Gateway
Table of Contents

Amazon Cognito (June 2026) issues JWT access tokens—validate locally with JWKS (/.well-known/jwks.json) for latency. Introspection (RFC 7662) hits the authorization server each request—slower but immediate revocation awareness if the AS supports it.

Decision matrix

ApproachLatencyRevocation
JWT local validateLowUntil expiry (unless short TTL + refresh)
IntrospectionHigherReal-time if AS honors active: false
API Gateway JWT authorizerEdge validationCognito token lifetime

Opinionated take: Short-lived access tokens (5–15 min) + local JWKS validation for APIs; introspection for high-risk admin actions only.

AWS wiring

  • HTTP API JWT authorizer — issuer, audience from Cognito pool
  • Lambda authorizer — custom claims, Cedar via Verified Permissions
  • mTLS — separate track for B2B

What to do this week

  1. Enable Cognito token revocation API where required.
  2. Cache JWKS with kid rotation handling.
  3. Map scopes to IAM-style policies in Verified Permissions for new services.

What this guide doesn’t cover

Rate limiting—part 2 of API track.

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Palaniappan P

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