MCP Server Authentication Issue - 401 Unauthorized Error | AWS_Strands

[itsmesunil]

Issue Description:
Using Atlassian Remote MCP Server as documented at:

`https://support.atlassian.com/atlassian-rovo-mcp-server/docs/getting-started-with-the-atlassian-remote-mcp-server`
/
Getting 401 Unauthorized error when connecting to https://mcp.atlassian.com/v1/sse

Access token is successfully retrieved from https://auth.atlassian.com/oauth/token

Error occurs during SSE client initialization

Steps Taken:
1. Successfully obtained fresh access token via OAuth flow
2. Token refresh works correctly with standard Atlassian API
3. Access token format appears valid (Bearer token)
4. Followed MCP server documentation exactly

Please advise