ChemCloud MCP Open Platform (mcp.chem-cloud.cn) is the developer portal for chemical-industry data via MCP: Tools, downloadable Skills, and web ask-data (问数).
Chinese name: 芯化和云数据智能开放平台 (short: 芯化和云). Do not confuse this portal with other ChemCloud SaaS properties (e.g. data analytics sites); those share the brand family but different product surfaces. Full Chinese About: /about/.
Scale today: about 77 Tools and 20 Skills. Trial: about 3 days / 100 calls (see benefits). One platform API Key covers open MCP tools. Start with the English guide or Chinese 接入指南.