Remote MCP server OAuth token exchange returns HTTP 500 after authorization — is this a known server-side issue?

Hello, I am asking about a repeated failure connecting to a remote MCP server, and whether this is a known server-side issue or if there is a workaround.

Setup (generic details only):

- Remote MCP server: [https://mcp.desktopcommander.app/mcp](https://mcp.desktopcommander.app/mcp)

• OAuth 2.0 with dynamic client registration

• Scopes: mcp:tools and desktop:auth

• Resource: the server root at the same host, without the /mcp path

- Token endpoint: [Desktop Commander Remote MCP - beta](https://mcp.desktopcommander.app/token)

- Token auth: none

- PKCE: S256

Failure, repeated:

After clicking Allow during authorization, the token exchange returns HTTP 500:

{“error”:“server_error”,“error_description”:“Failed to process token request”} At the same time, the dashboard shows the device as Online.

Questions:

1. Is this a known server-side issue?

2. Is there a workaround, such as omitting the resource parameter on the token request, using client_secret_post, or using a fresh dynamic client registration client with no manual client ID?

Thank you for any guidance on what to try next.