Tool	Description
`log_meal`	Log a meal with description, type, calories, macros, notes
`get_meals_today`	Get all meals logged today
`get_meals_by_date`	Get meals for a specific date (YYYY-MM-DD)
`get_nutrition_summary`	Daily nutrition totals for a date range
`delete_meal`	Delete a meal by ID
`update_meal`	Update any fields of an existing meal
`delete_account`	Permanently delete account and all associated data

Supabase Setup

Create a Supabase project
Enable Email Auth (Authentication → Providers → Email) and disable email confirmation
Run the following SQL in the SQL Editor:

-- Meals
CREATE TABLE meals (
    id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id uuid NOT NULL REFERENCES auth.users(id),
    logged_at timestamptz NOT NULL DEFAULT now(),
    meal_type text CHECK (meal_type IN ('breakfast', 'lunch', 'dinner', 'snack')),
    description text NOT NULL,
    calories integer,
    protein_g numeric,
    carbs_g numeric,
    fat_g numeric,
    notes text
);

-- OAuth access tokens
CREATE TABLE oauth_tokens (
    token text PRIMARY KEY,
    user_id uuid NOT NULL REFERENCES auth.users(id),
    expires_at timestamptz NOT NULL,
    created_at timestamptz NOT NULL DEFAULT now()
);

-- OAuth authorization codes (short-lived, single-use)
CREATE TABLE auth_codes (
    code text PRIMARY KEY,
    redirect_uri text NOT NULL,
    user_id uuid NOT NULL REFERENCES auth.users(id),
    code_challenge text,
    expires_at timestamptz NOT NULL,
    created_at timestamptz NOT NULL DEFAULT now()
);

-- Refresh tokens
CREATE TABLE refresh_tokens (
    token text PRIMARY KEY,
    user_id uuid NOT NULL REFERENCES auth.users(id),
    expires_at timestamptz NOT NULL,
    created_at timestamptz NOT NULL DEFAULT now()
);

-- Enable Row Level Security on all tables
ALTER TABLE meals ENABLE ROW LEVEL SECURITY;
ALTER TABLE oauth_tokens ENABLE ROW LEVEL SECURITY;
ALTER TABLE auth_codes ENABLE ROW LEVEL SECURITY;
ALTER TABLE refresh_tokens ENABLE ROW LEVEL SECURITY;

-- Allow access for the service role
CREATE POLICY "Allow all for service role" ON meals
    FOR ALL USING (true) WITH CHECK (true);
CREATE POLICY "Allow all for service role" ON oauth_tokens
    FOR ALL USING (true) WITH CHECK (true);
CREATE POLICY "Allow all for service role" ON auth_codes
    FOR ALL USING (true) WITH CHECK (true);
CREATE POLICY "Allow all for service role" ON refresh_tokens
    FOR ALL USING (true) WITH CHECK (true);

Copy the service role key from Project Settings → API and use it as SUPABASE_SECRET_KEY

Environment Variables

Variable	Description
`SUPABASE_URL`	Your Supabase project URL
`SUPABASE_SECRET_KEY`	Supabase service role key (bypasses RLS)
`OAUTH_CLIENT_ID`	Random string for OAuth client identification
`OAUTH_CLIENT_SECRET`	Random string for OAuth client authentication
`PORT`	Server port (default: `8080`)

Generate OAuth credentials:

openssl rand -hex 16   # use as OAUTH_CLIENT_ID
openssl rand -hex 32   # use as OAUTH_CLIENT_SECRET

Development

bun install
cp .env.example .env   # fill in your credentials
bun run dev             # starts with hot reload on http://localhost:8080

Connect to Claude.ai

Open Claude.ai and click Customize
Click Connectors, then the + button
Click Add custom connector
Fill in:
- Name: Nutrition Tracker
- Remote MCP Server URL: https://nutrition-mcp.com/mcp
Click Connect — sign in or register when prompted
After signing in, Claude can use your nutrition tools. If you reconnect later, sign in with the same email and password to keep your data.

API Endpoints

Endpoint	Description
`GET /health`	Health check
`GET /.well-known/oauth-authorization-server`	OAuth metadata discovery
`POST /register`	Dynamic client registration
`GET /authorize`	OAuth authorization (shows login page)
`POST /approve`	Login/register handler
`POST /token`	Token exchange
`GET /favicon.ico`	Server icon
`ALL /mcp`	MCP endpoint (authenticated)

Deploy

The project includes a Dockerfile for container-based deployment.

Push your repo to a hosting provider (e.g. DigitalOcean App Platform)
Set the environment variables listed above
The app auto-detects the Dockerfile and deploys on port 8080
Point your domain to the deployed URL

License

MIT

Try in Playground

Server Config

{
  "mcpServers": {
    "nutrition": {
      "url": "https://nutrition-mcp.com/mcp"
    }
  }
}

Build with ShipAny.