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x402 vs AP2 vs send21: three ways AI agents handle payments

This story is from 2026-10-22. It is preserved in the archive; the latest stories are on the live feed.

Disclosure: this is written by the team behind send21, one of the three approaches below. We have tried to describe the other two from their own documentation, and we link to it so you can check. "How does an AI agent pay?" has at least three different answers right now, and they are not really com…

Read the full story at DEV Community — AI ↗

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  1. 2026-10-22 20:24 · DEV Community — AI
    x402 vs AP2 vs send21: three ways AI agents handle payments

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