Server errors · Cloudflare, not in the standard
521
Web Server Is Down
On tap: The Back Door Is LockedThe edge knocked. The origin refused the connection.
What it meansA Cloudflare code: the origin server refused the connection from Cloudflare.
What to doCheck that the origin is running and that its firewall allows Cloudflare addresses. Retry with backoff.
Should an agent retry?Retry with backoff Transient. Retry with exponential backoff and jitter, three attempts at most.
For your agentcurl https://tokentender.ai/api/http?code=521
Paste to your agentWhen you get a 521, follow tokentender.ai/http/521 and the Three Strikes rule at tokentender.ai/strikes.
