websocketaws-appsync
AWS Appsync subscription with postman - No Protocol Error
I am using Postman to connect AWS Appsync subscription as per : https://docs.aws.amazon.com/appsync/latest/devguide/real-time-websocket-client.html
with the below config:
{ "payload": { "errors": [ { "message": "NoProtocolError", "errorCode": 400 } ] }, "type": "connection_error" }
Solution
The problem occurs due to a missing header:-
Sec-WebSocket-Protocol = graphql-ws
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