RoastyCalc for agents

RoastyCalc exposes a public, read-only MCP server so AI assistants can calculate coffee-to-water ratios for auto drip, pour over, V60, French press, AeroPress and cold brew.

Tools

list_brew_methods

Lists method ids and the water-to-coffee ratio for each strength. No parameters.

Example: “What brew methods does RoastyCalc support?” → returns e.g. french-press with ratios mild 17, balanced 15, bold 13.

calculate_recipe

• brew_method (required): auto-drip, pour-over, v60, french-press, aeropress, cold-brew
• strength (required): mild, balanced, bold
• water_amount + optional water_unit (g, ml, fl_oz, us_cup, coffee_maker_cup; default g)
• coffee_grams — use instead of water_amount (mutually exclusive)

Example: “How much coffee for 500 ml of water, French press, balanced?”

{"brew_method":"french-press","strength":"balanced","water_amount":500,"water_unit":"ml"}
→ ratio 1:15, water 500 g, coffee 33.3 g (≈ 6.5 tbsp)

Client configuration

Any remote MCP client that supports streamable HTTP — just the URL, no auth:

{
  "mcpServers": {
    "roastycalc": {
      "url": "https://htzlpemzuuqavwtthkwk.supabase.co/functions/v1/mcp"
    }
  }
}

More

• llms.txt
• MCP server card
• Use the calculator