Dumpling AI MCP Server

Instructions

Implementation Reference

• src/index.ts:989-1015 (registration)

  Registration of the 'run-js-code' tool using server.tool(), including name, description, schema, and handler function.

  server.tool(
    "run-js-code",
    "Execute JavaScript code in a sandbox.",
    {
      code: z.string().describe("JavaScript code"),
      commands: z.string().optional().describe("NPM install commands"),
      parseJson: z.boolean().optional().describe("Parse output as JSON"),
      timeout: z.number().optional().describe("Execution timeout in ms"),
      memory: z.number().optional().describe("Memory allocation in MB"),
    },
    async ({ code, commands, parseJson, timeout, memory }) => {
      const apiKey = process.env.DUMPLING_API_KEY;
      if (!apiKey) throw new Error("DUMPLING_API_KEY not set");
      const response = await fetch(`${NWS_API_BASE}/api/v1/run-js-code`, {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
          Authorization: `Bearer ${apiKey}`,
        },
        body: JSON.stringify({ code, commands, parseJson, timeout, memory }),
      });
      if (!response.ok)
        throw new Error(`Failed: ${response.status} ${await response.text()}`);
      const data = await response.json();
      return { content: [{ type: "text", text: JSON.stringify(data, null, 2) }] };
    }
  );

• src/index.ts:999-1014 (handler)

  Handler function that proxies the JavaScript code execution request to an external API endpoint at NWS_API_BASE/api/v1/run-js-code.

  async ({ code, commands, parseJson, timeout, memory }) => {
    const apiKey = process.env.DUMPLING_API_KEY;
    if (!apiKey) throw new Error("DUMPLING_API_KEY not set");
    const response = await fetch(`${NWS_API_BASE}/api/v1/run-js-code`, {
      method: "POST",
      headers: {
        "Content-Type": "application/json",
        Authorization: `Bearer ${apiKey}`,
      },
      body: JSON.stringify({ code, commands, parseJson, timeout, memory }),
    });
    if (!response.ok)
      throw new Error(`Failed: ${response.status} ${await response.text()}`);
    const data = await response.json();
    return { content: [{ type: "text", text: JSON.stringify(data, null, 2) }] };
  }

• src/index.ts:992-998 (schema)

  Zod schema defining the input parameters for the 'run-js-code' tool.

  {
    code: z.string().describe("JavaScript code"),
    commands: z.string().optional().describe("NPM install commands"),
    parseJson: z.boolean().optional().describe("Parse output as JSON"),
    timeout: z.number().optional().describe("Execution timeout in ms"),
    memory: z.number().optional().describe("Memory allocation in MB"),
  },