# Judge0 List Languages

> Judge0 List Languages is a paid API for AI agents from Judge0 at judge0.mpp.paywithlocus.com, paid per call via MPP, $0.005/call, status unknown (last checked 2026-10-13).

Returns the full list of programming languages supported by the Judge0 code execution sandbox, each with an ID and name.

## Facts

- Endpoint: POST https://judge0.mpp.paywithlocus.com/judge0/list-languages?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Provider: Judge0
- Docs: https://ce.judge0.com
- Website: https://judge0.com
- Tags: code-execution, sandbox, programming-languages, compute
- Canonical page: https://www.zero.xyz/c/judge0-list-languages-cd144196
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kMkqrPUzCzBRFt5ladJrG

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 judge0-list-languages-cd144196 -d '<json body>'
```

Example prompt: What programming languages and their IDs does the Judge0 sandbox support? I need to find the right language ID before submitting my code.

## When to prefer this

Use this endpoint before submitting code to discover the correct language_id for a given programming language and version. It is the authoritative reference for all Judge0-supported languages and should be called whenever you need to map a language name to its numeric ID.

## Known failure modes

- Network or server error returning non-200 status
- Empty or truncated list if the service is degraded
- Payment failure if USDC balance is insufficient for the $0.005 call fee

## How this service works

List all active programming languages with their IDs. Use language IDs for the execute-code endpoint.

## Output

An array of supported language objects, each containing a numeric ID (used when submitting code) and a human-readable name including the compiler or interpreter version (e.g. {"id": 71, "name": "Python (3.8.1)"}).

## Example request

```json
{
 "token": "test-submission-token-12345"
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {},
 "additionalProperties": true
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/judge0-list-languages-cd144196/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from judge0.mpp.paywithlocus.com](https://www.zero.xyz/host/judge0.mpp.paywithlocus.com/llms.txt)