Replit
api
API Endpoint Returns 404 on Replit
Your API endpoint returns 404 Not Found even though you defined it. The route isn't being registered or accessed incorrectly.
Routing misconfiguration or incorrect request path causes 404s.
Error Messages You Might See
404 Not Found
No mapping for GET /api/endpoint
Whitelabel Error Page
Common Causes
- Controller not annotated with @RestController or method with @GetMapping/@PostMapping
- Wrong HTTP method (GET vs POST)
- Route path mismatch between client and server
- Controller class not in Spring-scanned package
- Typo in request URL or path variable
How to Fix It
Ensure @RestController on class and @GetMapping('/path') on method. Check request method matches (GET, POST, etc.). Verify full URL including host matches Replit deployment domain. Use Postman to test endpoint. Check Spring logs for registered endpoints with ./gradlew bootRun --debug | grep RequestMapping.
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Get HelpFrequently Asked Questions
How do I verify my routes are registered?
Run with debug logging and search logs for 'RequestMappingHandlerMapping'
What's the difference between @RequestMapping and @GetMapping?
@RequestMapping(method=GET) vs @GetMapping - latter is shorthand for GET