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Building an x402 Settlement Client in Python: Lessons from a Real Testnet Transaction

This story is from 2026-09-27. It is preserved in the archive; the latest stories are on the live feed.

The demo takes ten minutes. I know, because I ran one: an AI agent paying another AI agent over HTTP, settled on-chain, no accounts, no API keys. The x402 protocol makes the happy path genuinely easy — a payment requirements object, an EIP-712/EIP-3009 signature, two calls to the facilitator ( /ver…

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  1. 2026-09-27 19:36 · DEV Community — AI
    Building an x402 Settlement Client in Python: Lessons from a Real Testnet Transaction

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