405 Not Allowed · Reliable

In the bustling city of Silicon Circuit, every citizen is a and every building is a Server .

The clerk pointed to a small plaque on the wall—the . It listed the only "verbs" the building accepted: GET, HEAD, OPTIONS . 405 Not Allowed

Eli, a young traveler, stood before the heavy oak doors of the . He had a simple task: he wanted to leave a letter for a friend. He walked up to the reception desk, where a clerk sat behind a glass partition. In the bustling city of Silicon Circuit, every

For a quick technical breakdown of why this error happens in the real world, check out this summary: OPTIONS . Eli

"I don't understand," Eli said. "Is the library closed? Is the address wrong?"