Harmonic Protocol (HARMO)

First human-validated x402 trading protocol on Base.

Whitepaper

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Interest lvl

NA

Updated: Dec 11, 2025

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User Rating

Medium

3/5 • 1 votes

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Ticker

HARMO

Registration year2025

Ecosystems

Base

What is Harmonic Protocol

Harmonic Protocol is the first human-validated x402 trading protocol on Base.

It operates entirely through x402 requests.

Users submit their trades into a shared mempool. Anyone can validate them by solving a CAPTCHA and confirming the request.

Validators earn a portion of each transaction in USDC, creating an open, fair, and human-driven trading layer.

The protocol runs on Base and is completely gasless — no ETH required to trade.