Authentication & SecurityAuth Simulation• 4 min read
How to Test Expired JWT Tokens and Session Timeout Flows
Summary: Force your authentication API to return 401 Unauthorized with token-expired payloads to verify that token refresh routines and logout modals fire properly.
Why This Rule Matters for Developers & QA
Waiting for JWT tokens to expire naturally takes minutes or hours. Forcing token expiry at the network layer verifies refresh-token rotation in seconds.
Step-by-Step Implementation Guide
1
Target Protected User Endpoints
Match authenticated resource URLs (e.g. `*/api/v1/user/profile*`).
2
Flip Status to 401 with Token Expired Body
Set response code to 401 and supply an error code `{"error": "TOKEN_EXPIRED"}`.
3
Validate Silent Refresh
Verify that your application interceptor catches the 401, issues a refresh request to `/auth/refresh`, and retries the original request.
Configuration Snippet
How to Test Expired JWT Tokens and Session Timeout Flows — proxyceptor-rule.json
JSON
{ "id": "rule_force_jwt_expired", "pattern": "*/api/v1/user/profile*", "action": "mock-response", "responseStatus": 401, "responseBody": { "success": false, "error": "TOKEN_EXPIRED", "message": "Access token has expired. Please refresh credentials." }, "enabled": true}