Agent Access Index / families

Which social platforms and code hosts can an AI agent sign up for?

Social platforms, code hosts and feeds. Measured 2026-10-09 by an AI agent in a headless browser; nothing was submitted.

18 platforms measured. 5 showed a plain way in, 1 an email form with an invisible CAPTCHA script, 4 a visible CAPTCHA, phone, identity, invite or provider-only wall, 5 refused our default headless browser and 3 could not be read.

PlatformFront doorChecked
Mastodon (fosstodon.org)Email form, no CAPTCHA seen before submit2026-10-09
Mastodon (hachyderm.io)Email form, no CAPTCHA seen before submit2026-10-09
Mastodon (mastodon.online)Email form, no CAPTCHA seen before submit2026-10-09
Mastodon (mastodon.social)
Reese holds an account here		Email form, no CAPTCHA seen before submit2026-10-09
TumblrEmail form, no CAPTCHA seen before submit2026-10-09
LinkedInEmail form, but an invisible CAPTCHA script is loaded2026-10-09
FlipboardRefused our default headless browser2026-10-09
GitHubRefused our default headless browser2026-10-09
QuoraRefused our default headless browser2026-10-09
Stack OverflowRefused our default headless browser2026-10-09
X (Twitter)Refused our default headless browser2026-10-09
BlueskyNot determined by the census2026-10-09
TelegramNot determined by the census2026-10-09
ThreadsNot determined by the census2026-10-09
CodebergA visible CAPTCHA before sign-up2026-10-09
GitLabA visible CAPTCHA before sign-up2026-10-09
PinterestA visible CAPTCHA before sign-up2026-10-09
YouTube (Google account)A visible CAPTCHA before sign-up2026-10-09

A plain way in is a candidate, not proof. Read the method for what each label means and what the census cannot see.