Replit api

Spring Actuator Endpoints Returning 401

Spring Actuator endpoints (/actuator/metrics, /actuator/health) return 401 Unauthorized. Metrics and health checks are blocked.

Security configuration restricts actuator access inappropriately.

Error Messages You Might See

401 Unauthorized Access Denied Authentication required
401 UnauthorizedAccess DeniedAuthentication required

Common Causes

  1. Authentication required for actuator endpoints
  2. ROLE not matching actuator security rule
  3. Actuator endpoints not exposed in application.yml
  4. Too strict SecurityFilterChain
  5. CSRF token missing for POST requests

How to Fix It

In application.yml: management.endpoints.web.exposure.include=health,metrics. In SecurityConfig: permitAll() for /actuator/** or httpBasic(). Use @EnableSpringDataWebSupport for proper role checking. For development, disable auth: management.security.enabled=false (NOT for production).

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Frequently Asked Questions

Which endpoints should be public?

/actuator/health is usually public. /actuator/metrics usually needs auth

How do I expose all actuator endpoints?

management.endpoints.web.exposure.include=* (only for internal apps!)

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