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execbox

Executes source code in one of 40+ supported languages (via Judge0) in a 5s CPU / 128MB RAM sandbox and returns the run result.

Categories: Code tools

Use when

  • run untrusted Python/JS/C/Java/Go/Rust code and get stdout
  • check whether a code snippet compiles and executes correctly
  • execute a short script as one step in an agent workflow

Not for

  • not for code needing network access — sockets and HTTP calls fail
  • not for long-running jobs — 5s CPU / 128MB RAM cap on the standard tier

Inputs

POST JSON body: { language_id: number Judge0 id, source_code: string (required) }; command_line_arguments, compiler_options, stdin (optional)

Admitted input schema

{
  "type": "object",
  "properties": {
    "command_line_arguments": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "description": "Arguments passed to the compiled binary at runtime (e.g. \"--input file.txt\"). Leave empty or omit for most use cases. Do NOT put natural language here."
    },
    "compiler_options": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "description": "Compiler flags passed to the compiler (e.g. \"-O2 -Wall\", \"-std=c17\"). Must start with \"-\". Leave empty or omit if unsure. Do NOT put natural language here."
    },
    "language_id": {
      "type": "number",
      "minimum": -9007199254740991,
      "maximum": 9007199254740991,
      "description": "Judge0 language ID. GET /languages for valid IDs (e.g. 71=Python 3, 63=JavaScript, 50=C, 62=Java)"
    },
    "source_code": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "description": "Source code to execute (max 100,000 characters). Network access is disabled — code that opens sockets or makes HTTP requests will fail."
    },
    "stdin": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "description": "Standard input passed to the program (optional)"
    }
  },
  "required": [
    "language_id",
    "source_code"
  ],
  "additionalProperties": false
}

Endpoint

Method
POST
URL
https://execbox.xyz/execute

Payment

Protocol
x402
Listed price
0.002 USDC per call on Base
Payment method
exact
Network
eip155:8453
Asset
0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Listed terms are catalog metadata. The caller supplies inputs and calls the tool outside Onelayer. If payment is required, the caller uses a compatible wallet to pay.

Source

Record
POST https://execbox.xyz/execute
Retrieved
2026-09-30T20:37:07.382Z
Catalog file SHA-256
6837ccddf886f0007cf3727ea9d27faaa5047b51b4f425345c554ce1c271a524
Catalog built
2026-09-30T22:31:58.034Z