Cloudflare · Behaviour change
new_classes on PUT /client/v4/accounts/{}/workers/scripts/{} stops working
Stopped working
Calls to PUT /client/v4/accounts/{}/workers/scripts/{}, body parameter new_classes on Cloudflare stopped working on July 9, 2026.
What to use instead of these calls
Create Durable Object classes with a new_sqlite_classes migration instead of new_classes.
Calls it hits
PUT /client/v4/accounts/{}/workers/scripts/{}body parameter new_classes
Facts
- API
- Cloudflare
api.cloudflare.com - Kind
- Behaviour change
- Announced
- July 9, 2026
- Takes effect
- July 9, 2026
- Calls after that day
- Fail
- Source
- Announcement
- Last updated