AI engineering glossary · Web APIs HTTP
What is 409 Conflict?
409 Conflict: The status code meaning the request clashes with the current state of the resource, such as creating something that already exists or updating with an outdated version. The client must resolve the conflict before retrying.
409 Conflict: an example
Registering an email that is already in use returns 409.
Related terms
More Web APIs HTTP terms
- 422 Unprocessable Content
- 429 Too Many Requests
- 500 Internal Server Error
- 502 Bad Gateway
- 503 Service Unavailable
- 504 Gateway Timeout
- Accept header
- Access token
Where you learn it
409 Conflict is part of the AI Engineering Program, which teaches it with notes, a hands-on lab and an exam. The first lesson is free.