412
⚠️ Client Error RFC 9110, Section 15.5.13
Precondition Failed
One or more conditions given in the request header fields evaluated to false.
Common Use
Used with If-Match, If-None-Match, If-Modified-Since. Common in optimistic concurrency control (ETag mismatch).
API Endpoint
https://codes.uncodigo.com/http/412 Example with curl
curl -i https://codes.uncodigo.com/http/412Try It
GET /http/412 Click "Send Request" to see the response...