A $10,811 Cloudflare Bill From an Unused AI-Written Test Project: Refunds Aren't a Safety Net

sujingshen · x · 2026-10-15

A cost-control guide for indie developers. In October 2026, developer shmily7 received a $10,811.41 Cloudflare bill: an unused, AI-assisted test project had a Durable Objects alarm callback that rescheduled itself, firing 600 times per second — 51.84 million invocations a day with zero users. He paid in full first to avoid account suspension (other services depended on it); support initially refused, but after the post spread, a Cloudflare employee stepped in and processed a $10,701.41 refund on Oct 9 ($110 short).

The article distills how cloud services burn indie devs: bills scale with invocations, not users; the platform won't brake for you; refunds depend on luck; and the platform holds both your bill and your service. Tracker site Billflare lists 13 Durable Objects incidents totaling $66,897.60, the largest being Will Moss's $34,895 (20 trillion reads after health checks woke objects); another queue-consumer loop hit $36,000. Causes repeat: self-rescheduling alarms, unbounded retries, unindexed D1 full scans (zmuleyu: 1.476 trillion rows read). Several incidents involved AI-written code — functionally correct, tests passing, but nobody asked 'what's the worst-case invocations per minute?'

Original post →

A $10,811 Cloudflare Bill From an Unused AI-Written Test Project: Refunds Aren't a Safety Net

More from coding & agent