Other MCP clients

Any MCP client that speaks Streamable HTTP can use the Data MCP server. For clients that only run local (stdio) servers, use a bridge such as mcp-remote. To inspect the server by hand, use the MCP Inspector.

#Streamable HTTP clients

Configure a remote server with:

What the server expects and returns:

• Every JSON-RPC message is a POST with Content-Type: application/json and Accept: application/json, text/event-stream.
• Responses are application/json.
• The server is stateless: it issues no Mcp-Session-Id, and tools/call works without a prior initialize. Clients that send initialize receive protocol version 2025-06-18.
• Authentication failures return HTTP 401 with WWW-Authenticate: Bearer resource_metadata="https://data-services.autouncle.com/.well-known/oauth-protected-resource/mcp" and a JSON-RPC error whose data is a Problem.

You can try this with curl; see test the endpoint directly.

#mcp-remote for stdio-only clients

mcp-remote runs locally as a stdio server and forwards to the remote endpoint. Use it in any client that can start a command:

{
  "mcpServers": {
    "autouncle-data": {
      "command": "npx",
      "args": ["mcp-remote", "https://data-services.autouncle.com/mcp", "--header", "Authorization:${AUTH_HEADER}"],
      "env": { "AUTH_HEADER": "Bearer au_test_..." }
    }
  }
}

• Write Authorization:${AUTH_HEADER} without a space after the colon. Some clients mangle spaces inside arguments; keeping the space in the environment value avoids that.
• Without --header, mcp-remote runs the OAuth flow in your browser.
• mcp-remote tries Streamable HTTP first by default.

#MCP Inspector

The MCP Inspector shows the tools and lets you call them by hand.

npx @modelcontextprotocol/inspector

This opens a web UI: choose the Streamable HTTP transport, enter the URL and add the Authorization header. From the command line:

npx @modelcontextprotocol/inspector --cli --transport http \
  --server-url https://data-services.autouncle.com/mcp \
  --header "Authorization: Bearer $AUTOUNCLE_API_KEY" --method tools/list

Pin the Inspector's version when you use it in CI.

#Verify the connection

Call get_account. It takes no arguments and returns your workspace, the key's mode and scopes, and your remaining credits.

Sources: MCP Streamable HTTP transport, mcp-remote, MCP Inspector.