Error in output of databricks managed mcp server

old_school
New Contributor II

‎11-01-2025 07:42 AM

Hi Databricks Community,

Need suggestions.

I have added two functions and I am able to use them. I am using Cursor IDE but in the logs I can see below error,

2025-11-01 20:10:23.203 [info] Handling CreateClient action
2025-11-01 20:10:23.203 [info] Creating streamableHttp transport
2025-11-01 20:10:23.203 [info] Connecting to streamableHttp server
2025-11-01 20:10:23.213 [info] No stored tokens found
2025-11-01 20:10:23.784 [info] No stored tokens found
2025-11-01 20:10:24.324 [info] Successfully connected to streamableHttp server
2025-11-01 20:10:24.324 [info] Storing streamableHttp client
2025-11-01 20:10:24.324 [info] CreateClient completed, server stored: true
2025-11-01 20:10:24.325 [info] No stored tokens found
2025-11-01 20:10:24.344 [info] Handling ListOfferings action, server stored: true
2025-11-01 20:10:24.344 [info] Connected to streamableHttp server, fetching offerings
2025-11-01 20:10:24.346 [info] No stored tokens found
2025-11-01 20:10:24.966 [info] Found 2 tools, 0 prompts, and 0 resources
2025-11-01 20:10:25.016 [error] Client error for command Streamable HTTP error: Failed to open SSE stream: Not Found
2025-11-01 20:10:25.016 [error] Client error for command Streamable HTTP error: Failed to open SSE stream: Not Found

mcp.json

"uc-fun": {

      "type": "streamable-http",

      "url": "https://my_url.cloud.databricks.com/api/2.0/mcp/functions/dev_sales/silver",

      "headers": {

        "Authorization": "Bearer <my_token>"

      },

      "note": "Databricks UC function"

    }

 

 

Thank you.

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AbhaySingh
Databricks Employee
Databricks Employee

‎11-03-2025 08:06 AM

The most important thing to know is: Databricks supports external MCP servers only if they use the Streamable HTTP transport mechanism. Client errors related to Streamable HTTP typically occur if the MCP server or client is not compliant with this transport protocol, or if the HTTP connection establishment fails.

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