# CN Evidence

> China supplier due diligence and Chinese vendor verification API for AI agents. 中国供应商核验：企业身份、统一社会信用代码、政府采购中标、监管历史与证据来源。No signup or API key. Paid calls require a compatible funded wallet.

Results are limited to configured official/open datasets and must not be interpreted as nationwide completeness. Published coverage describes Shenzhen company/USCC, abnormal-operation and penalty datasets and Beijing procurement awards. No record found is not nationwide absence. Awards are not verified contract performance. Historical abnormal-operation records are not current abnormal status. Preserve ambiguous linkage and UNKNOWN.

## Use the right tool

- resolve_china_company: GET /free/cn/entity/resolve, free, company required (2-200 characters). Inspect candidates; do not guess. Obtain the intended USCC before using paid tools if ambiguous.
- get_china_supplier_evidence_basic: GET /x402/cn/supplier/evidence/basic, $0.002 USDC. Supply company or uscc. Summaries, linkage and source coverage; no detailed evidence rows.
- get_china_supplier_evidence_full: POST /x402/cn/supplier/evidence, $0.01 USDC. Supply company or uscc. include_evidence=true by default, evidence_limit integer 0-100, default 100. Full may return detailed evidence rows with type/source/dataset/checked_at and at least one valid dataset_id or content_id. Preserve record-specific locators. Check evidence_meta for truncation.

USCC must be 18 uppercase letters/digits. Canonical protocol: x402 v2 exact, Base eip155:8453, USDC, EIP-3009. Basic amount 2000; Full amount 10000. Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913; payTo 0x3aEDB825B264e82676A42B1a6d12EA253c0Ce852. Validate live challenges and spending authorization before signing. Unsigned curl requests do not pay.

## Authoritative public API links

- [API origin](https://cn-evidence-agent402-public.mikeyang7789.workers.dev/)
- [OpenAPI](https://cn-evidence-agent402-public.mikeyang7789.workers.dev/openapi.json)
- [Agent manifest](https://cn-evidence-agent402-public.mikeyang7789.workers.dev/.well-known/agent.json)
- [x402 manifest](https://cn-evidence-agent402-public.mikeyang7789.workers.dev/.well-known/x402)
- [Resolver example](https://cn-evidence-agent402-public.mikeyang7789.workers.dev/.well-known/cn-evidence/examples/resolve.json)
- [Basic example](https://cn-evidence-agent402-public.mikeyang7789.workers.dev/.well-known/cn-evidence/examples/basic.json)
- [Full example](https://cn-evidence-agent402-public.mikeyang7789.workers.dev/.well-known/cn-evidence/examples/full.json)
- [MPP adapter contract](https://cn-evidence-mpp-public.mikeyang7789.workers.dev/openapi.json)
- [Remote MCP](https://cn-evidence-mcp-public.mikeyang7789.workers.dev/mcp): LIVE / public MCP SDK verified; Streamable HTTP; 3 tools.
- [Glama](https://glama.ai/mcp/connectors/dev.workers.mikeyang7789.cn-evidence-mcp-public/cn-evidence-china-supplier-due-diligence): LIVE / Healthy / 3 tools.
- [Official MCP Registry](https://registry.modelcontextprotocol.io/v0.1/servers?search=cn-evidence): active; version 0.1.0; server name dev.workers.mikeyang7789.cn-evidence-mcp-public/cn-evidence.
- [MPPScan](https://mppscan.com/server/10e814be2d90b2566a8df027a63795b0a8142e279327cf6dbd9302a241d7aa45): LIVE.
- [Public documentation repository](https://github.com/YANGCHUNHONG3000/cn-evidence-public-docs)

All examples are static and explicitly not_live_query; do not cite them as fresh supplier facts. Full's regulatory sample NOT_ENTERED is not current abnormal listing or a penalty.

Integration status updated 2026-09-10: Remote MCP is live and public MCP SDK verification has passed. Its three tools are resolve_china_company, get_china_supplier_evidence_basic, and get_china_supplier_evidence_full. Basic and Full require spending authorization and payment; resolve is free. The MPP adapter separately advertises MPP and x402; inspect its own live schema.

## HTML documentation (GitHub Pages: LIVE)

- [English](https://yangchunhong3000.github.io/cn-evidence-public-docs/)
- [中文](https://yangchunhong3000.github.io/cn-evidence-public-docs/zh/)

Live documentation and directory listings do not guarantee search-engine indexing or natural-language discovery by every agent.
## Use Cases / 使用场景

- [Supplier identity (en)](https://yangchunhong3000.github.io/cn-evidence-public-docs/china-supplier-verification/)
- [Government procurement (en)](https://yangchunhong3000.github.io/cn-evidence-public-docs/china-government-procurement-evidence/)
- [Regulatory evidence (en)](https://yangchunhong3000.github.io/cn-evidence-public-docs/china-company-regulatory-evidence/)
- [供应商主体核验 (zh-CN)](https://yangchunhong3000.github.io/cn-evidence-public-docs/zh/china-supplier-verification/)
- [政府采购与中标证据 (zh-CN)](https://yangchunhong3000.github.io/cn-evidence-public-docs/zh/government-procurement-evidence/)
- [行政处罚与监管证据 (zh-CN)](https://yangchunhong3000.github.io/cn-evidence-public-docs/zh/regulatory-evidence/)

These task pages explain how to choose evidence depth. They are documentation, not live supplier facts or an indexing guarantee.