Hi Prakhar,
I also had issues connecting Snaplogic MCP server to claude desktop via the customize->connectors
So I did another approach:
Open Claude Code in claude desktop give it the server url from the MCP you created in snaplogic
Also give it the info of the authentication policy
I created an API Key authenticator policy
tested out with a key and told claude code
Result: Claude adds the MCP server and the connection works
Let me know if this works fro you