GardenMaths MCP server: metric garden soil, mulch and potting-mix maths, planting calendars and frost odds for Australia and New Zealand, inside Claude, ChatGPT, Cursor and VS Code.

MCP endpoint (Streamable HTTP, no sign-in): https://mcp.gardenmaths.com/mcp

claude.ai: Settings > Connectors > Add custom connector, paste the URL above.
Claude Code: claude mcp add --transport http gardenmaths https://mcp.gardenmaths.com/mcp

Tools: raised_bed_soil, area_material, potting_mix, planting_calendar, frost_risk.
Data: GardenMaths (gardenmaths.com). Frost odds: "GardenMaths analysis of Bureau of Meteorology data via SILO", https://gardenmaths.com/guides/frost-after-melbourne-cup-day/ (CC BY 4.0). NZ frost averages: NIWA (now Earth Sciences New Zealand).