# Isolated Python Code Execution via Modal Sandbox

> Isolated Python Code Execution via Modal Sandbox is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.04/call, status unknown (last checked 2026-10-12).

Executes up to 2,000 characters of Python 3.11 code in an isolated Modal cloud sandbox and returns stdout, stderr, and exit code

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-python-cloud-execution?utm_source=zero.xyz
- Price: $0.04/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/isolated-python-code-execution-via-modal-sandbox-8e68ac17
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Wf59IOiBT4doBR_aCYyeC

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability isolated-python-code-execution-via-modal-sandbox-8e68ac17 -d '<json body>'
```

Example prompt: Can you run this Python snippet for me in the cloud and tell me what it prints: `import math; print([math.factorial(n) for n in range(10)])`?

## When to prefer this

Choose this endpoint when you need to safely execute arbitrary Python 3.11 code in an isolated cloud environment without setting up local infrastructure, and only need Python standard library modules. Ideal for quick computations, string manipulation, data transformations, or logic validation where persistence and external packages are not required. Prefer over local execution when security isolation matters, or over general LLM code interpretation when you need actual execution with real stdout/stderr output.

## Known failure modes

- Code exceeds 2,000 character limit — request rejected before execution
- Execution exceeds 20-second timeout — process terminated, partial stdout may be returned
- Code imports third-party packages not in the Python standard library — ImportError in stderr
- Runtime Python error (SyntaxError, NameError, etc.) — non-zero exit code with traceback in stderr
- Sandbox infrastructure unavailable — service-level error returned

## How this service works

Isolated Python Code Execution: Run up to 2,000 characters of Python 3.11 code in a temporary Modal sandbox via BlockRun. Up to 20 seconds, 1 CPU and 512 MB. Returns stdout, stderr and exit code. Code runs at the provider; no seller credentials are supplied. Python standard library only; no persistence. 0.04 USDC includes one 20-second Python execution.

## Output

Returns the captured stdout (printed output), stderr (error messages or tracebacks), and exit code from the executed Python process, reflecting exactly what the script produced during its up-to-20-second run in a 1-CPU, 512MB Modal sandbox.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "code": {
   "type": "string",
   "default": "print(sum(range(10)))",
   "maxLength": 2000,
   "minLength": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/isolated-python-code-execution-via-modal-sandbox-8e68ac17/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)