Dimension scores are derived from public data and fields; weighted into the composite. Reference only.
cn402 is a Chinese metaphysics and traditional culture data API service built for AI Agents, with a focus on “programmatic pay-per-use.” Its page shows 75 endpoints across 11 categories, covering BaZi, I Ching, feng shui, divination, almanacs, the lunar calendar, Chinese characters, traditional Chinese medicine, folklore, geography, weather, foreign exchange, and x402 ecosystem intelligence. Instead of the traditional API Key model, it returns data after completing automated payment via HTTP 402 and x402.
The feature coverage is broad, especially for Agents that need structured Chinese traditional culture data. Examples include Four Pillars chart generation, useful gods, Ten Gods, I Ching hexagrams, date selection, solar terms, lunar calendar conversion, Chinese character pinyin / simplified-traditional conversion, and TCM constitution analysis. On the developer side, it currently provides clear JS/TypeScript examples using x402-fetch and viem, with wallet-signed EIP-3009 on Base. The page states that any x402-capable client or agent can use it, while the Python client and MCP server are still coming soon.
Pricing is pay-per-call by endpoint, with no account, no API Key, and no subscription. Settlement is in USDC on Base. Pricing transparency is fairly good: the page lists a per-call price for each endpoint, ranging from $0.0022 for simplified/traditional Chinese character conversion to $4.99 for x402 revenue intelligence at /x402/dewash. This is friendly for Agent scenarios involving small, frequent calls without a fixed subscription, but it also requires callers to have an on-chain wallet, USDC, and x402 payment capability.
Its strengths are its vertical focus and rich category coverage, including many long-tail Chinese metaphysics and calendar capabilities rarely found in mainstream API marketplaces. The HTTP 402 payment model is well suited to autonomous Agents, and the lack of accounts and keys reduces credential-management overhead. The drawbacks are that the page does not disclose key information such as data sources, accuracy validation, SLA, rate limits, error codes, parameter schemas, or response examples. Meanwhile, dependencies such as on-chain payments, the Coinbase CDP facilitator, and the Base network raise the integration barrier for traditional developers.
It is suitable for developers building tools around fortune-telling, almanacs, festivals, Chinese characters, TCM wellness, traditional culture Q&A, or automated Agents. It may also suit service providers that want to connect their own APIs to x402-based charging. The page does not state its accessibility from mainland China, and on-chain payments, USDC, and Coinbase-related components may involve network or compliance uncertainty, so we rate it as “unknown.” If x402 is not usable, alternatives include building your own traditional calendar / Chinese character database or choosing conventional API Key-based calendar, weather, or geography data services.
⚠ This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on cn402.com official site.
cn402.com is an Unknown API & Data provider. TG4G tracks its product information, with monthly pricing from $0.01, an overall rating of 7.0/10, and a China-accessibility score of Workable. Click "Visit Official Site" to reach cn402.com directly.