Verified🛒 E-Commerce
Stienhardt Diamond MCP
Official no-auth MCP server from Stienhardt & Stones with ten tools for sourced diamond education, grading-report verification guidance, face-up size estimates, dated Lab Grown Diamond market context, a 90-entry gemology encyclopedia, and live Stienhardt inventory search. It never verifies a stone itself and directs users to the issuing lab. The hosted Streamable HTTP endpoint is free, stateless, and requires no API key.