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whatchuneed Code Execution API
x402
whatchuneed Code Execution API is a paid API for AI agents from whatchuneed.vercel.app, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-15).
Executes source code in a specified programming language (Python, JavaScript, Rust, etc.) and returns stdout, stderr, and exit code
Price / call$0.1
Success—
StatusUnknown
How this service works
320+ pay-per-call API endpoints across accommodation, LLM, code execution, crypto, medical, finance, and more. One API, one payment. Powered by x402 protocol.
Output
Returns an object with stdout (standard output string), stderr (standard error string), exitCode (integer process exit code), language (the language used), and version (runtime version used). A zero exit code indicates successful execution.
Example use cases
Dynamic calculation in agent workflow
“Execute this Python snippet for me and return the result: `def compound_interest(p, r, t): return p * (1 + r/100)**t; print(compound_interest(1000, 5, 10))`”
Test JavaScript string parsing logic
“Run this JavaScript code and show me the output: `const s = 'hello world'; console.log(s.split(' ').map(w => w[0].toUpperCase() + w.slice(1)).join(' '));`”
Compile and run a Rust program
“Execute this Rust code and tell me if it compiles and what it outputs: `fn main() { let v: Vec<i32> = (1..=5).collect(); println!("{:?}", v); }`”
Technical details
Endpoint
POSThttps://whatchuneed.vercel.app/api/code/executeWhen to prefer
Choose this endpoint when an AI agent needs to dynamically execute untrusted or generated code in a sandboxed remote environment without provisioning local compute. It is well-suited for agent workflows that need to evaluate mathematical expressions, test code snippets, or run scripts across multiple languages (Python, JavaScript, Rust, etc.) on a pay-per-call basis with no setup overhead.
Side effects
- Unsupported language name returns an error or non-zero exit code
- Syntax errors in code surface in stderr with non-zero exitCode
- Infinite loops or long-running code may time out
- Missing required fields (code or language) return a 4xx error
- Runtime exceptions appear in stderr with non-zero exitCode
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| coderequired | string | Source code to execute |
| stdin | string | Standard input |
| version | string | Language version (optional) |
| languagerequired | string | Language name (python, javascript, rust, etc.) |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| stderr | string | |
| stdout | string | |
| version | string | |
| exitCode | integer | |
| language | string |
Tags
x402
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