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[ARTICLE · art-151208] src=jsonexlab.com ↗ pub= topic=ai-products verified=true sentiment=↑ positive

Show HN: I built 7 B2B APIs and 5 MCP servers for compliance and trade

A developer launched a free HS (Harmonized System) code classification tool on Show HN that uses GPT-4o-mini to return 6-10 digit customs codes from a product description, offered via REST API, a Model Context Protocol server for AI agents, and a Google Sheets add-on. The service allows 50 classifications per day free with no signup, and supports agent-native payments in USDC on Base with no API keys, pay per call. The developer says the stack is built on Cloudflare Workers, x402, and MCP, and that seven B2B APIs and five MCP servers were built for compliance and trade.

read1 min views4 publishedOct 16, 2026

Free AI-powered HS (Harmonized System) code classification. For importers, exporters, and developers building customs tools.

No signup. Type a product, get an HS code.

Powered by GPT-4o-mini. Accurate, fast, and works for any product description.

HS codes 6-10 digits. Chapter, heading, subheading — full Harmonized System.

REST API, Model Context Protocol server for AI agents, and Google Sheets add-on.

Agent-native payments in USDC on Base. No signup, no API keys — pay per call.

Classify a full product catalog in one request. Perfect for importers.

50 classifications per day, free. No credit card, no signup, no rate limits.

Other API products built on the same stack — Cloudflare Workers, x402, MCP.

source & further reading
jsonexlab.com — original article
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