# Cap — Modern, lightning-quick PoW captcha

<https://capjs.js.org/>

- Host: [capjs.js.org](https://links.thingelstad.xyz/hosts/capjs.js.org/)
- Saved: June 12, 2025 (2025-06-13T01:55:52Z)
- Record: https://links.thingelstad.xyz/links/7384d501a1ed/
- JSON: https://links.thingelstad.xyz/links/7384d501a1ed.json

## What Jamie wrote

[Completely Automated Public Turing Test to tell Computers and Humans Apart](https://en.wikipedia.org/wiki/CAPTCHA), or CAPTCHA, those little tests you get at times to find an image or decipher a number, have largely been circumvented by either dark patterns involving relaying the tests to other humans or AI. This library takes a different approach using a proof-of-work scheme and is even easier on the end user. All of these methods are a form of proof of humanity, which is a deceptively hard problem and getting harder with more advanced technology.

## Facts

- Kind: [Page](https://links.thingelstad.xyz/kinds/page/)

## Appears in

- [WT323: Weekly Thing 323 / Context, Dithering, Liquid Glass](https://weekly.thingelstad.com/archive/323/), Notable

## Saved the same week

- [MCP Is RSS for AI: More Use Cases for Model Context Protocol - The New Stack](https://links.thingelstad.xyz/links/048220716462/) (thenewstack.io, June 12, 2025)
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- [Breaking down why Apple TVs are privacy advocates’ go-to streaming device - Ars Technica](https://links.thingelstad.xyz/links/b53f6c4eccdb/) (arstechnica.com, June 12, 2025)
- [powRSS](https://links.thingelstad.xyz/links/75245550dd4f/) (powrss.com, June 12, 2025)
- [Model Context Protocol (MCP) Tools for Mac - Michael Tsai](https://links.thingelstad.xyz/links/59baaa159b61/) (mjtsai.com, June 12, 2025)

## Elsewhere

- Wayback Machine: https://web.archive.org/web/*/https://capjs.js.org/