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How an agent pays per call with x402

This story is from 2026-10-03. It is preserved in the archive; the latest stories are on the live feed.

Most data APIs want an account, a key and a monthly plan. An agent that needs one answer once does not want any of that. x402 turns the HTTP status code 402 ("Payment Required") into a payment step that a program can complete on its own. The flow The client sends a normal request, for example GET /…

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  1. 2026-10-03 17:06 · DEV Community — AI
    How an agent pays per call with x402

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