Yantrix MCP

Instructions

Implementation Reference

• src/index.ts:166-223 (handler)

  The codebase implements a dynamic tool server where tool definitions are fetched at runtime from a registry URL. The `compare_trends` tool (or any other tool) is handled generically by looking up the requested tool name in the registry and then invoking the associated remote endpoint via the `callTool` function. There is no hardcoded implementation for `compare_trends` within this file.

  server.setRequestHandler(CallToolRequestSchema, async (request) => {
    const { name, arguments: args } = request.params;
  
    let registry: Registry;
    try {
      registry = await fetchRegistry();
    } catch (error) {
      return {
        content: [
          {
            type: "text",
            text: JSON.stringify({ error: "Failed to fetch tool registry", detail: String(error) }),
          },
        ],
      };
    }
  
    const tool = registry.tools.find((t) => t.name === name);
    if (!tool) {
      return {
        content: [
          {
            type: "text",
            text: JSON.stringify({
              error: `Tool '${name}' not found`,
              available_tools: registry.tools.map((t) => t.name),
            }),
          },
        ],
      };
    }
  
    try {
      const result = await callTool(tool, args as Record<string, unknown>);
      return {
        content: [
          {
            type: "text",
            text: JSON.stringify(result, null, 2),
          },
        ],
      };
    } catch (error) {
      return {
        content: [
          {
            type: "text",
            text: JSON.stringify({
              error: "Tool call failed",
              tool: name,
              service: tool.service,
              detail: String(error),
            }),
          },
        ],
      };
    }
  });