run-js-code
Execute JavaScript code in a sandbox environment to test scripts, process data, or run computations with configurable memory and timeout settings.
Instructions
Execute JavaScript code in a sandbox.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| code | Yes | JavaScript code | |
| commands | No | NPM install commands | |
| parseJson | No | Parse output as JSON | |
| timeout | No | Execution timeout in ms | |
| memory | No | Memory allocation in MB |
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"), },