Help with Adobe Analytics MCP / 500 Internal Server Error

Hi everyone,

I’m currently trying to test the Adobe Analytics MCP.

So far, I have:

• been granted the required permissions (MCP Access + Developer Access)
• created a project in the Adobe Developer Console
• generated API credentials/keys as part of the setup

After adding the MCP server in Cursor, I’m able to authenticate successfully. However, all requests fail afterward with a 500 Internal Server Error coming from the MCP endpoint.

Error message:

Transient error connecting to streamableHttp server:
Streamable HTTP error: Error POSTing to endpoint:
{
  "method":"POST",
  "error":"Proxy error",
  "message":"500 Internal Server Error",
  "targetUrl":"https://<adobe-mcp-endpoint>/mcp"
}

From the logs, it seems the OAuth/authentication flow succeeds, but the MCP endpoint itself fails afterward.

Has anyone run into this before, or does anyone know what could be the cause?

Any guidance would be hugely appreciated. thanks!