Cursor
api
API Request Missing Required Headers After Refactoring
API requests generated by Cursor are missing required headers, causing requests to fail with 400 or 401 errors. The server requires specific headers like Authorization or Content-Type, but they're no longer being sent.
Header setup code may have been removed or restructured incorrectly.
Error Messages You Might See
401 Unauthorized
400 Bad Request
Missing Authorization header
Invalid Content-Type
Common Causes
- Authorization header removed or incorrect format (missing 'Bearer ' prefix)
- Content-Type header not set for POST/PUT requests
- Custom headers removed from fetch/axios default config
- Header key name changed (e.g., 'X-API-Key' vs 'x-api-key')
- Header value set to undefined or null
How to Fix It
Verify header format: Authorization: 'Bearer ' + token. Set Content-Type: 'application/json'. Use axios defaults: axios.defaults.headers.common['Authorization'] = 'Bearer ' + token. Log request headers to debug: console.log(req.headers).
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Get HelpFrequently Asked Questions
How do I set default headers?
axios: axios.defaults.headers.common['X-Custom'] = 'value'. fetch: new Headers({...}) passed in init object.
What's Bearer token?
HTTP auth scheme. Format: 'Authorization: Bearer token'. Server checks token after 'Bearer ' prefix.