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x402 Code Execution Sandbox
x402
x402 Code Execution Sandbox is a paid API for AI agents from x402-gateway-production.up.railway.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Executes Python, JavaScript, Bash, or R code in an isolated sandbox and returns stdout, stderr, exit code, and execution time
Price / call$0.005
Success—
StatusUnknown
How this service works
Run code in isolated sandbox — Python, JavaScript, Bash, R (up to 5 min)
Output
Returns a JSON object with: stdout (string output from the code), stderr (any error messages), success (boolean), exit_code (integer), execution_time_ms (how long it took), and outputs (array of any structured outputs). On success, stdout contains the printed results of the code run.
Example use cases
Example prompt
“Can you run this Python snippet for me and show me the output: `import statistics; data = [4, 8, 15, 16, 23, 42]; print(statistics.mean(data), statistics.stdev(data))`?”
Technical details
Endpoint
POSThttps://x402-gateway-production.up.railway.app/api/code/runWhen to prefer
Use this endpoint when you need to execute arbitrary code in Python, JavaScript, Bash, or R without a local runtime environment. Ideal for dynamic computation, data transformation, math-heavy tasks, scripting, or testing small code snippets. Prefer this over LLM-only computation when you need exact numerical results, file processing logic, or reproducible scripted outputs. Supports up to 5 minutes of runtime, making it suitable for moderate data processing tasks.
Side effects
- Code syntax error — success:false, non-zero exit_code, error message in stderr
- Execution timeout — code runs longer than 5 minutes, process killed
- Unsupported language specified — returns error for languages other than python/javascript/bash/r
- Runtime error — unhandled exceptions cause non-zero exit code and traceback in stderr
- Missing required fields — no code or language provided returns 400-level error
Input
{
"code": "print('Hello from sandbox'); result = sum([1, 2, 3, 4, 5]); print(f'Sum: {result}')",
"language": "python"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
{
"stderr": "",
"stdout": "Hello from sandbox\nSum: 15\n",
"outputs": [],
"success": true,
"exit_code": 0,
"execution_time_ms": 380
}Tags
x402
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