gRPC Endpoints throwing errors in Postman

oseifrimpongg
HOBBY

10 days ago

Hi,
I built a gRPC API using .NET and packaged it in a Docker container.
Local testing in Postman works fine with HTTP/2 enabled, but once I deploy it to my server, gRPC requests fail.

Postman shows:

Could not load server reflection. Details: 1 CANCELLED: Call cancelled

However, if I hit the endpoint in my browser, I get:

An HTTP/1.x request was sent to an HTTP/2 only endpoint.

which means HTTP/2 is enabled.

Details:

  • Framework: .NET 9

  • Deployment: Docker container

  • Works locally with Postman, fails after deployment with the above error

1 Replies

Railway
BOT

10 days ago

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gRPC Endpoints throwing errors in Postman - Railway Help Station