https://github.com/mcaptcha/libmcaptcha

core library of mCaptcha a PoW based CAPTCHA system
https://github.com/mcaptcha/libmcaptcha

actix captcha mcaptcha pow rate-lim rust

Last synced: about 2 months ago
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core library of mCaptcha a PoW based CAPTCHA system

• Host: GitHub
• URL: https://github.com/mcaptcha/libmcaptcha
• Owner: mCaptcha
• License: agpl-3.0
• Created: 2021-02-28T09:27:33.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2023-12-29T13:33:18.000Z (over 1 year ago)
• Last Synced: 2025-03-26T01:03:35.611Z (3 months ago)
• Topics: actix, captcha, mcaptcha, pow, rate-lim, rust
• Language: Rust
• Homepage:
• Size: 5.83 MB
• Stars: 26
• Watchers: 3
• Forks: 3
• Open Issues: 3
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • Funding: .github/FUNDING.yml
  • License: LICENSE.md
  • Code of conduct: code_of_conduct.md

Awesome Lists containing this project

README

        


  
libmcaptcha

  


    mCaptcha - PoW based DoS protection

  


[![Documentation](https://img.shields.io/badge/docs-master-yellow)](https://mcaptcha.github.io/libmcaptcha/libmcaptcha/index.html)

[![Documentation](https://img.shields.io/badge/docs-0.1.3-blue)](https://mcaptcha.org/docs/api/mcaptcha-system)

[![dependency status](https://deps.rs/repo/github/mCaptcha/libmcaptcha/status.svg)](https://deps.rs/repo/github/mCaptcha/libmcaptcha)

[![AGPL License](https://img.shields.io/badge/license-AGPL-blue.svg)](http://www.gnu.org/licenses/agpl-3.0)

![CI (Linux)]()




[![codecov](https://codecov.io/gh/mCaptcha/libmcaptcha/branch/master/graph/badge.svg)](https://codecov.io/gh/mCaptcha/libmcaptcha)

[![Documentation](https://img.shields.io/badge/matrix-community-purple)](https://matrix.to/#/+mcaptcha:matrix.batsense.net)



mCaptcha uses SHA256 based proof-of-work(PoW) to rate limit users.

If someone wants to hammer your site, they will have to do more work to

send requests than your server will have to do to respond to their

request.

> **NOTE:** `0.1.x` is out, expect breaking changes as ergonomics and

> performance is improved. Checkout [changelog](./CHANGELOG.md) for

> changes and migration pointers. Breaking changes will be frequent

> through `0.1.x`.

## Why use mCaptcha?

- Free software, privacy focused

- Seamless UX - No more annoying captchas!

- IP address independent(sort of) - your users are behind a NAT? We got you covered!

- Automatic bot throttling

- Resistant to replay attacks - bye-bye captcha farms!

## Demo

### Demo servers are available at:

- https://demo.mcaptcha.org/

- https://demo2.mcaptcha.org/ (runs on a Raspberry Pi!)

> Core functionality is working but it's still very much

> work-in-progress.

Feel free to provide bogus information while signing up(project under

development, database frequently wiped).

### Self-hosted:

Please refer to [mCaptcha/mCaptcha](https://github.com/mCaptcha/mCaptcha) for

instructions.

## Documentation

- [docs.rs](https://docs.rs/libmcaptcha)

- [master-branch](https://mcaptcha.github.io/mCaptcha/libmcaptcha/index.html)

- [All published versions](https://mcaptcha.org/docs/api/mcaptcha-system)

## Usage

mCaptcha is made up of three components:

#### 1. Front-end library

We have a WASM library now, Android and iOS libraries soon

#### 2. Back-end library

We have Rust library, other languages will have support soon

#### 3. Rate limiting service

Under development.

A paid, managed service will be made available soon but

I([@realaravinth](https://batsense.net)) encourage you guys to

self-host. Go decentralisation!

## Contributing

yes please!

## Funding

### NLnet



	






2023 development is funded through the [NGI0 Entrust

Fund](https://nlnet.nl/entrust), via [NLnet](https://nlnet.nl/). Please

see [here](https://nlnet.nl/project/mCaptcha/) for more details.