Question 1

What are X (Twitter) feature flags?

Accepted Answer

Feature flags are toggles in X.com's client-side JavaScript that control which features are enabled or disabled. They're stored in a public 'feature switch manifest' that X.com fetches on every page load. We mirror this manifest and track changes over time.

Question 2

Where does this data come from?

Accepted Answer

We poll the public 'feature switches' endpoint that X.com's web client requests on initialization. The data is the same JSON the X.com web app sees — no scraping or reverse engineering of private APIs.

Question 3

How often are flag changes detected?

Accepted Answer

We snapshot the flag manifest every 4 hours. Any new flag, removed flag, or value change is logged in the history feed at /twitter-feature-flags?view=history.

Question 4

Can I trust these flags to predict launches?

Accepted Answer

Sometimes. Flags often reflect features in active development or A/B testing, but a flag being 'true' doesn't guarantee a feature will ship publicly. Use this as a signal, not a roadmap.

X Feature Flags

X Feature Flags