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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.

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

"If you want to leave something," the clerk explained, "you need to go to the . That building accepts the POST method. Here, we only let people look." Eli, a young traveler, stood before the heavy

Eli sighed, realizing his mistake. He had the right address, but he was trying to use an "enter" key on a door that only had a handle to "exit." He tucked his letter away and set off for the correct endpoint. The clerk pointed to a small plaque on the wall—the