Developer builds AI-payable Korean business verification API using MCP and crypto micropayments

A developer has launched Korea Business Verify (KBV), a remote MCP server that allows AI agents to confirm the legitimacy of Korean businesses using official National Tax Service data. The tool addresses a gap where autonomous agents could not access Korea's government business registry due to Korean-language portals and SMS-based verification requirements. Agents pay $0.02 per call in USDC via the x402 protocol, with the entire transaction — discovery, payment, and data retrieval — completed without human involvement. The service is listed on Coinbase's x402 Bazaar, a discovery catalog for agent-payable APIs, where it currently ranks first for Korean business registration verification searches. The builder also shared candid lessons, including that directory listing traffic is dominated by bots, and that offering a free tier can disqualify a service from appearing in payment-gated marketplaces.