Find Units

Find geological rock units, formations, bedrock geology, and mineral information for any location worldwide. Use for geology questions, rock types, age dating, lithology, and geological analysis.

Find Units costs $0.01 per call on xpay. No subscription, no minimums. Pay only for the calls you make. New accounts get $5 in free credits.

Connect the Macrostrat MCP endpoint to your client — Claude Code: claude mcp add --transport http macrostrat "https://macrostrat.mcp.xpay.sh/mcp?key=YOUR_XPAY_KEY"; Cursor/Windsurf/Cline/VS Code: same URL in mcp.json. The agent will see find-units as a callable tool with the input schema and run it directly. (Unified across all providers: https://mcp.xpay.sh/mcp?key=YOUR_XPAY_KEY, then xpay_run with toolPath macrostrat/find-units.)

Yes — that's exactly what xpay is for. You don't need a Macrostrat account or API key. Sign up at xpay.tools (Google or email), get $5 free credit, and run Find Units immediately. Billing flows through your xpay balance.

Find Units accepts 3 input parameters: lng, lat, responseType. See the input schema and runnable form on this page for details and to test live.