x402 from zero

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Next: The status code that waited

6 minutes. The first lesson in Understand it.

HTTP set aside 402 Payment Required in the 1990s and never said how to use it. x402 gives the code a job: a price your software can read and pay.

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    x402 from zero

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    Part 1: Understand it

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    What x402 is, one payment step by step, where an agent’s money comes from, and the real numbers.

    1. From lesson 2 you’ll need a free account. It takes one tap.

    Subtotal42 min

    Part 2: Build or sell

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    What could sell, how to price it, and your first paid endpoint on a free test network.

    Subtotal56 min

    Part 3: The players

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    Who runs x402, who builds on it, and how to judge a project yourself.

    Subtotal39 min
    Done so far0 of 137 min
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