What is Arjun

HTTP parameter discovery suite. Arjun can find query parameters for URL endpoints. If you don't get what that means, it's okay, read along.

What Arjun does

From the project README: "This URL seems to load user information for a specific user id, but what if there exists a parameter named admin which when set to True makes the endpoint provide more information about the user?\ This is what Arjun does, it finds valid HTTP parameters with a huge default dictionary of 25,890 parameter names."

Project details

Arjun is a Python project published on GitHub by s0md3v, under the AGPL-3.0 license. It has about 6,436 GitHub stars. The repository was last updated in February 2025.

Topics

The maintainers tag Arjun with: api-fuzzer, api-fuzzing, api-testing, parameter-discovery, recon.

FAQs

Is Arjun free to use?

Yes. Arjun is open source and published under the AGPL-3.0 license.

What language is Arjun written in?

Arjun is mainly written in Python, according to its GitHub repository.

Is Arjun still maintained?

It was last updated in February 2025. Check the repository's issues and releases for current activity.

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