Code Sandbox API
Execute Python, JavaScript, SQL code in a sandbox. x402 micropayment.
Open source Repository Open in the app JSON README (API)
About
Execute Python, JavaScript, SQL code in a sandbox. x402 micropayment.
Details
- Kind
- MCP servers
- Topic
- Developer tools
- Publisher
- br0ski777
- Origin
- official
- Category
- ferramentas
- Transport
- sse
- Version
- 1.1.0
- Last push
- 2026-09-02T19:55:23Z
- Repository state
- ativo
- Language
- TypeScript
- License
- MIT
- Added
- 2026-08-29 03:01:43
- Updated
- 2026-08-29 03:01:43
- Origin id
io.github.Br0ski777/code-sandbox
README
# Code Sandbox API
[](https://code-sandbox.api.klymax402.com/mcp)
[](https://x402.org)
[](LICENSE)
Execute Python, JavaScript, or SQL in a sandbox. Get stdout, execution time, errors. 10s timeout. Pay-per-call via [x402](https://x402.org) (USDC on Base L2) -- no API key, no signup, no rate-limit wall.
Part of the [klymax402](https://klymax402.com) marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.
## Quickstart -- MCP
Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):
```json
{
"mcpServers": {
"code-sandbox": {
"url": "https://code-sandbox.api.klymax402.com/mcp"
}
}
}
```
## Quickstart -- HTTP (x402)
```bash
curl -X POST "https://code-sandbox.api.klymax402.com/api/execute" \
-H "Content-Type: application/json" \
-d '{"code":"...","language":"..."}'
# -> 402 Payment Required, with an x402 payment challenge in the response body
```
Any x402-aware client ([`@x402/fetch`](https://www.npmjs.com/package/@x402/fetch), [`x402-agent-tools`](https://www.npmjs.com/package/x402-agent-tools), ATXP) handles the 402 -> sign -> retry cycle automatically.
## Tools
| Tool | Method | Path | Price | Description |
|---|---|---|---|---|
| `code_execute_sandbox` | POST | `/api/execute` | $0.02 | Execute code in a sandboxed environment |
### `code_execute_sandbox`
Use this when you need to execute Python, JavaScript, or SQL code in a sandboxed environment and get the output. Supports Python (subprocess), JavaScript (eval), and SQL (in-memory SQLite).
**Parameters**
| Name | Type | Required | Description |
|---|---|---|---|
| `code` | string | yes | The code to execute |
| `language` | string | yes | Programming language: python, javascript, or sql |
| `timeout` | number | no | Execution timeout in milliseconds (default: 5000, max: 10000) |
**Returns**
- `output` -- stdout captured from code execution (max 10KB)
- `language` -- the language that was executed
- `executionTimeMs` -- execution duration in milliseconds
- `exitCode` -- process exit code (0 = success)
- `error` -- error message if execution failed (null on success)
Example response:
```json
{"output":"Hello World\n42\n","language":"python","executionTimeMs":234,"exitCode":0,"error":null}
```
**When to use**: running calculations, data transformations, validating code snippets, or querying in-memory databases. Essential when you need computed results rather than static data.
## Example agent prompts
- "Execute Python, JavaScript, or SQL code in a sandboxed environment and get the output"
## Payment
- Protocol: [x402](https://x402.org) -- HTTP-native pay-per-call, no signup, no API key
- Network: Base L2 (`eip155:8453`)
- Asset: USDC
- Facilitator: Coinbase CDP (primary), PayAI (fallback)
- Also reachable via [ATXP](https://atxp.ai) (OAuth-wrapped x402, RFC 9728 protected-resource metadata)
## Part of klymax402
100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.
- Catalog: https://klymax402.com/llms.txt
- Full API reference: https://klymax402.com/llms-full.txt
- Live stats: https://klymax402.com/stats
## License
MIT