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x402score

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A Dianping for AI + web3: an AI agent pays two cents to check whether a seller's transactions are real. Live.

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A Dianping for AI + web3: an AI agent spends two cents to check whether a seller's transactions are real.

What this is

x402 is a protocol that lets AI agents (AI programs that automatically do things for people) pay a few cents per request to buy services, with no account and no card required. x402score is the credit-check counter on this street: an agent pays 0.02 USD and gets back that seller's score—verdict, share of fake volume, number of real buyers, repeat-customer ratio, plus data sources, update time, and confidence.

What problem it solves

Nearly half of the nominal transaction volume on x402 is fake. When people buy, they look at reviews and shop age; agents only see an address and a price, and before paying they cannot buy the judgment of "whether this is a real business." Four teams in the market are testing "whether a service is alive and fast"; no one is testing "whether the business is real."

Use cases

An agent buying services on behalf of its owner is about to pay and first spends two cents to check: it gets back avoid, 92% fake volume, so it switches to another. Before paying, it can first view a sample score for free, then decide whether to buy.

Highlights

  • Answers can be recomputed: fake-volume detection is two deterministic rules, confidence is a fixed weighted score, not AI self-reporting; anyone can verify the result using public on-chain data.
  • Prefer no sale to stale data: scores older than 24 hours are never sold; if upstream data validation fails, it directly returns "no reliable answer right now" instead of passing off yesterday's conclusion as fresh.
  • Unattended: deployed on Cloudflare Workers, designed to cost under $5 per month and require half an hour of manual work per month.

Where it stands now

Went live on mainnet on July 10, 2026, hosted at x402score.org, and active in the official MCP directory (the catalog where agents find tools). The positioning is a cheap option: hold a place while waiting for the agent economy to gain traction. So far, the only settlement is one I paid myself—the homepage says exactly that; the demand log records every query, including those that asked about the price but did not pay.