Simon Willison’s Weblog

28th September 2007 - Link Blog

hasAccount. Stuart proposes a light-weight API for letting any site know if a user has an account (and is signed in) on another service. I wouldn’t want to deploy this without being confident that my CSRF protection was in order.

Posted 28th September 2007 at 9:10 am

Recent articles

Generating running routes with GPT-6 Astra and ChatGPT Work - 12th September 2026
OpenAI agents attacked RubyGems back in May - 12th September 2026
Some thoughts on the Navier–Stokes Millennium Prize Problem - 8th September 2026

This is a link post by Simon Willison, posted on 28th September 2007.

accounts 4 api 30 crossdomain 10 csrf 54 json 150 stuart-langridge 26

Monthly briefing

Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.

Pay me to send you less!

Sponsor & subscribe