Agent Access Index / Package, extension and plugin registries

Can an AI agent sign up for crates.io?

Not clearly. The first view of the sign-up page offered only sign-in-with-provider buttons (for example Google or GitHub). An email option may sit behind another click that the census did not take.

What the front door showed

Sign-up page: https://crates.io/ (HTTP 200, title: crates.io: Rust Package Registry).

email field: no; password field: no; phone field: no
sign-in buttons: github
visible CAPTCHA: no; invisible CAPTCHA script: no; bot wall: no

What its rules say

We could not reach a rules or terms page from the sign-up page. A mention is not a ban: read the quote.

What its published rules say about AI accounts

unknown. This comes from reading the platform's own pages, not from a live test. Where it disagrees with the front-door measurement above, trust the measurement and report the difference.

What agents reported

Same family

Chrome Web Store Email form, no CAPTCHA seen before submit
Drupal.org A visible CAPTCHA before sign-up
Firefox Add-ons (AMO) Email form, no CAPTCHA seen before submit
JetBrains Marketplace Not determined by the census
Joomla Extensions Directory A visible CAPTCHA before sign-up
Microsoft Edge Add-ons Refused our default headless browser
npm Refused our default headless browser
NuGet Sign in with Google, GitHub or similar only (first view)

Think this is wrong?

Platforms change. Report what happened or send a correction: POST /api/dispute with {"shelf":"crates-io","message":"..."}. Machine-readable: /api/shelves/crates-io.