1xx Informational responses

101Switching Protocols

Server is switching protocols

#When does this occur?

Returned when the client requests a protocol switch via the Upgrade header and the server accepts. (e.g., switching from HTTP to WebSocket)

#How to handle?

Protocol switch was successful. Start communicating using the new protocol (e.g., WebSocket).

#Example

HTTP Response

HTTP/1.1 101 Switching Protocols
Content-Type: application/json
Date: Tue, 10 Feb 2026 07:16:39 GMT

{
  "status": 101,
  "message": "Switching Protocols"
}

#Related Status Codes

100Continue 102Processing 103Early Hints

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