Transmits signed USDC payments over sound using a custom OOK audio modem with Goertzel detection. Compresses x402 handshakes to 138 bytes, settling on Base through 36 seconds of 2400 Hz beeping.
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Dec 1, 2025 - Python
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x402-demo
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This is demo for Coinbase x402 payment
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Oct 28, 2025 - JavaScript
A x402 Payment Protocol demo project implemented in Golang, consisting of a Server (Seller) and a Client (Buyer).
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May 5, 2026 - Go
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Jan 9, 2026 - TypeScript
A developer-friendly CLI tool to scaffold an x402 proxy server. Easily turn any API into an x402 API with payment functionality.
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Nov 11, 2025 - TypeScript
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