Connecting to MCP via OAuth Dynamic Client Registration

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1

Hi,

I'm trying to connect a Retool Agent to the Circleback MCP server at:

https://app.circleback.ai/api/mcp

When selecting automatic authentication, I receive: “Failed to auto-configure auth: OAuth client registration failed.”

Circleback’s MCP implementation requires OAuth 2.0 with Dynamic Client Registration (RFC 7591), and it appears Retool fails during the client registration step.

My questions:

  1. Does Retool’s MCP integration support OAuth Dynamic Client Registration?

  2. If not, is there a supported way to manually configure OAuth for MCP servers that require DCR?

  3. Is Streamable HTTP with OAuth + DCR officially supported in Retool Agents?

I see that it is possible to connect to Circleback via both Claude & Cursor. So it seems like a bug?

4

Hi @Mick_Berkhout,

Thanks for reaching out! This doesn't look supported yet, but I'll share your request with our eng team. When we ship a solution, I'll reach out here