Summary
On September 1, 2026, Cloudflare D1 started enforcing free-tier daily query limits. Once a free account exceeds its allotment, queries via both the Workers Binding API and the REST API return errors until the limit resets at midnight UTC.
What changed
Cloudflare D1 turned on hard daily query caps for the free tier, with over-limit requests failing across the Workers Binding API and REST API until the UTC daily reset.
Why it matters
Apps built on D1's free tier can now hit a hard wall mid-day, forcing teams to plan capacity or upgrade; it signals Cloudflare tightening free-tier economics for its managed database as serverless and agent workloads drive query volume.
Evidence excerpt
D1 enforces free tier daily query limits — queries via the Workers Binding API and the REST API will return errors until the limit resets at midnight UTC.