MCP client doesn't work with application/json content type

[bfmvsa]

Is there an existing issue for this?

• I have searched the tracker for existing similar issues and I know that duplicates will be closed

Describe the Issue

When using the server's communication method HTTP, the client doesn't accept application/json content type as a response header.
At the same time, the client sends the Accept header with the following value: application/json, text/event-stream as it is supposed to be according to the MCP docs.

Steps To Reproduce

1. Open the new request tab.
2. Select HTTP communication method.
3. Insert the URL of the server that responds with Content-Type: application/json.
4. See the error message, like on the screenshot.

Screenshots or Videos

Operating System

macOS

Postman Version

11.55.2

Postman Platform

Postman App

User Account Type

Signed In User

Additional Context?

No response

[jonathanhaviv]

Hi @bfmvsa would you be able to share the server you're trying to connect to or a pared down version of the server code?

[bfmvsa]

Hi @jonathanhaviv
I just tried to reproduce the problem and I wasn't able to get that error again, it works well for me now.
I'm not sure if this is related to changes you've made or if there was something wrong in my previous testing.
Anyway this is the server I am testing right now: https://business-data-7066-dev-ed.scratch.my.site.com/services/apexrest/mcp/
Thank you

[jonathanhaviv]

@bfmvsa well glad that things are working now! I'm going to close this issue for now, but if you face this issue again let us know!