Driftwatch

Clerk / Clerk Backend API (2026-05-12) /

Breakingdirection flip: their tools call this safe

flow is no longer accepted

What changed

No error is raised. The value is ignored and your results change silently, which is the hardest class of break to notice.

Affects flow on GET /public/interstitial. Grep for it: nothing else will tell you.

Who is affected

Code that sends GET /public/interstitial (flow).

Before and after

WhereBeforeAfter
GET /public/interstitial · flowpresentabsent

Code that breaks

await client.post("/public/interstitial", {
  // flow is now ignored, not rejected
  flow: value,
});

Based on Clerk’s published API specification. How severity is decided.