Unable to execute tools on Atlassian Rovo MCP Server from Postman despite successful authentication

[Richa Goyal]

Issue Summary

Unable to execute tools on Atlassian Rovo MCP Server from Postman despite successful authentication and tool discovery.

Description

I am attempting to connect Postman to the Atlassian Rovo MCP Server.

I have created OAuth credentials using both:

1. Atlassian Service Account

2. Atlassian Developer Console

Using the Client Credentials grant type, I am successfully able to:

• Obtain an access token using https://auth.atlassian.com/oauth/token

• Connect to the Rovo MCP endpoint https://mcp.atlassian.com/v1/mcp/authv2

• Retrieve and list the available MCP tools.

However, when invoking any of the discovered tools, the request fails and returns the following error:

{
  "message": "We are having trouble completing this action. Please try again shortly."
}

Observations

• Authentication appears to be successful since access tokens are generated correctly.

• MCP tool discovery works as expected.

• The issue occurs only during tool execution.

• The behavior is consistent across credentials created from both the Service Account and Developer Console.

[Philipp Sendek _catworkx_]

Hi @Richa Goyal and welcome to the community,

what is/are the exact requests that you're sending to the Atlassian Rovo MCP Server using Postman?
That way I can try to help you find what the issue might be.

Without this knowledge, I'd like to point out that compared to normal REST APIs, the communication with an MCP server is using JSON RPC (remote procedure calls). I personally haven't used Postman for this purpose, so I don't know if it's capable of it. 

Maybe this helps, otherwise I'm happy to help you when you share more about the requests you're running.

Greetings
Philipp