426
⚠️ Client Error RFC 9110, Section 15.5.22
Upgrade Required
The server refuses to perform the request using the current protocol but might be willing to do so after the client upgrades.
Common Use
Used to force protocol upgrades, typically from HTTP/1.1 to HTTP/2 or to require TLS encryption.
API Endpoint
https://codes.uncodigo.com/http/426 Example with curl
curl -i https://codes.uncodigo.com/http/426Try It
GET /http/426 Click "Send Request" to see the response...
Related Headers
Upgrade Required protocol version
Upgrade: TLS/1.2, HTTP/1.1