judge0

Open-source online code execution system that runs submitted code in a sandbox behind an HTTP JSON API.

Harness by judge0

IndexedGPL-3.0★ 4,492

Install

From the package registry. Read the repository before you give any tool access to your data.

pip install judge0

Get the weekly diff

The weekly diff: one email a week with new agent tools, notable updates and grade changes, plus security alerts for tools you follow. Double opt-in, one-click unsubscribe.

About

Judge0 is an open-source online code execution system. It compiles and runs untrusted source code in a sandbox and returns the results, and it can be self-hosted or used as a managed cloud service. Integration is through an HTTP JSON API and an official Python SDK. The README also lists multi-file programs, custom compiler options, time and memory limits, and webhooks.

Use cases: testing, code-generation

Reviews

Write a review

No reviews yet. Installed it? Reviews come from verified installers only. How reviews work

Fact sheet

Languages: PythonREADME
Packages: judge0 (pypi)README
Deploys to: self-hosted, managed cloudREADME
Maturity: Stablegithub.com

Facts extracted by Claude Haiku 5.5 from the linked sources on Oct 24, 2026. Wrong fact? Tell us.

Alternatives

Frameworks for the same language with a similar way of orchestrating agents.

Signals

Stars: 4,492
Forks: 944
Open issues: 171
Weekly downloads: 174
Last commit: Oct 18, 2026 (10 days ago)
Last release: Apr 18, 2024 (2 years ago)
Last package publish: Feb 6, 2026 (8 months ago)

From GitHub (fetched Oct 24, 2026) and the package registry.

Details

Packages: pypi judge0
License: GPL-3.0
Repository: github.com/judge0/judge0
Website: judge0.com
First seen: Oct 24, 2026
Last checked: Oct 24, 2026
Source: README github-graphql

Cite this page

judge0. Agent Mart. https://agentmart.dev/harnesses/judge0 (last updated 2026-10-24)