HTTP 402 Was Almost Useless for Decades. AI Agents May Finally Give It a Job
There is something wonderfully strange about HTTP 402.
Most developers have seen it at least once while scrolling through a list of status codes. 200 OK, obviously useful. 404 Not Found, practically a cultural icon. 500 Internal Server Error, the message nobody wants to see on a Friday afternoon.
Then there is: 402 Payment Required
It sounds important. It sounds like the web was designed from day one with a native payment layer.
Except it wasn't.
For years, 402 was more of a reserved parking space than an actual part of everyday web development. The status still has no universally defined browser behavior or standard payment workflow. MDN continues to describe it as reserved for future use, with implementations varying between systems.
And yet, in 2026, I find myself looking at 402 very differently. Not because humans suddenly need another way to buy subscriptions. Because software is starting to buy...
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