MCP Servers

nutrition-mcp

MCP server for USDA nutrition data lookup, meal logging, and daily macro tracking.

Category

README

nutrition-mcp

USDA FoodData Central MCP server for nutrition lookup, meal logging, and daily macro tracking.

Setup

Get a free API key at https://fdc.nal.usda.gov/api-key-signup
Set USDA_API_KEY environment variable (or it falls back to DEMO_KEY)

cp .env.example .env
# Edit .env with your key

Usage

node src/server.js  # stdio MCP server

Tools

`nutrition`

Action	Description	Key Params
`search`	Search foods by name	`query`, `dataType`, `pageSize`
`get`	Full nutrition details	`fdcId`
`compare`	Side-by-side macro comparison	`fdcIds` (array)

`meal_log`

Action	Description	Key Params
`log`	Log a food eaten	`fdcId`, `servings`, `mealType`, `date`
`list`	List entries for a date	`date`, `mealType`
`delete`	Remove an entry	`entryId`
`daily_summary`	Macro totals for a day	`date`
`weekly_summary`	Weekly averages	`weekOf`

`targets`

Action	Description	Key Params
`set`	Set daily macro targets	`calories`, `protein`, `carbs`, `fat`, `fiber`
`get`	View current targets	—
`progress`	Progress vs targets	`date`

Architecture

src/
  server.js          — MCP stdio server
  usda-client.js     — USDA API client with 24h cache
  meal-log.js        — Local meal log storage (~/.nutrition-mcp/logs/)
  targets.js         — Macro targets storage (~/.nutrition-mcp/targets.json)
  tools/
    nutrition.js     — nutrition tool handler
    meal-log.js      — meal_log tool handler
    targets.js       — targets tool handler
test/
  server.test.js     — Unit tests

Testing

npm test

License

MIT © Aaron Sachs

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