Four tools tell you what exists, what each one costs and exactly how the payment works, all without spending — which is the right shape for a metered service an agent will drive unattended. On sourcing the project is specific rather than vague: statistics come from the National Bureau's data portal, policy from the government search service and company data from the national credit system, each rate-limited to one request per 3 seconds with robots.txt respected and no captcha bypass.
A pay-per-fetch data service for agents. Discovery is free; the data endpoints answer a request with a payment challenge, the agent signs a gasless USDC authorisation, and the data comes back. There is no account to create and no key to store — the wallet is the credential.
- Free discovery: every endpoint listed, the China data APIs listed with their prices, details on one capability, and a step-by-step payment guide — `discover_capabilities`, `discover_china_data_apis`, `get_capability_info`, `get_payment_instructions`
- National Bureau of Statistics figures — GDP, CPI, PPI — at $0.005 per request — `query_industry_statistics`
- Chinese government policy documents searched at $0.005 per request — `search_china_policies`
- Enterprise credit information at $0.003 per request — `query_company_credit`
- A payment initiated for any endpoint, including asset delivery — `purchase_capability`
- A free catalogue, OpenAPI specification and llms.txt served at the API base, plus dynamic web content fetch at $0.008 per request
A wallet holding USDC on Base and an x402 client — no API key, no login. The API base is `https://api.060504.shop`, and the MCP server speaks Streamable HTTP. Payment is x402 v2 using EIP-3009 transfer authorisation, which is gasless: the first call returns HTTP 402 with the payment requirements, you sign, retry with the payment header, and the server settles on chain before returning the data. Health, the OpenAPI spec, the asset catalogue and llms.txt are free to call.