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@cyanheads/usda-mcp-server

Search foods, compare nutrients, and look up the full USDA FoodData Central database via MCP. STDIO or Streamable HTTP.\n

5 Tools • 2 Resources

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\n\n[![Version](https://img.shields.io/badge/Version-0.1.9-blue.svg?style=flat-square)](./CHANGELOG.md) [![License](https://img.shields.io/badge/License-Apache%202.0-orange.svg?style=flat-square)](./LICENSE) [![Docker](https://img.shields.io/badge/Docker-ghcr.io-2496ED?style=flat-square&logo=docker&logoColor=white)](https://github.com/users/cyanheads/packages/container/package/usda-mcp-server) [![MCP SDK](https://img.shields.io/badge/MCP%20SDK-^2.0.0-green.svg?style=flat-square)](https://modelcontextprotocol.io/) [![npm](https://img.shields.io/npm/v/@cyanheads/usda-mcp-server?style=flat-square&logo=npm&logoColor=white)](https://www.npmjs.com/package/@cyanheads/usda-mcp-server) [![TypeScript](https://img.shields.io/badge/TypeScript-^7.0.2-3178C6.svg?style=flat-square)](https://www.typescriptlang.org/) [![Bun](https://img.shields.io/badge/Bun-v1.4.0-blueviolet.svg?style=flat-square)](https://bun.sh/)\n\n

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\n\n[![Install in Claude Desktop](https://img.shields.io/badge/Install_in-Claude_Desktop-D97757?style=for-the-badge&logo=anthropic&logoColor=white)](https://github.com/cyanheads/usda-mcp-server/releases/latest/download/usda-mcp-server.mcpb) [![Install in Cursor](https://cursor.com/deeplink/mcp-install-dark.svg)](https://cursor.com/en/install-mcp?name=usda-mcp-server&config=eyJjb21tYW5kIjoibnB4IiwiYXJncyI6WyIteSIsIkBjeWFuaGVhZHMvdXNkYS1tY3Atc2VydmVyIl0sImVudiI6eyJVU0RBX0ZEQ19BUElfS0VZIjoieW91ci1hcGkta2V5In19) [![Install in VS Code](https://img.shields.io/badge/VS_Code-Install_Server-0098FF?style=for-the-badge&logo=visualstudiocode&logoColor=white)](https://vscode.dev/redirect?url=vscode:mcp/install?%7B%22name%22%3A%22usda-mcp-server%22%2C%22command%22%3A%22npx%22%2C%22args%22%3A%5B%22-y%22%2C%22%40cyanheads%2Fusda-mcp-server%22%5D%2C%22env%22%3A%7B%22USDA_FDC_API_KEY%22%3A%22your-api-key%22%7D%7D)\n\n[![Framework](https://img.shields.io/badge/Built%20on-@cyanheads/mcp--ts--core-67E8F9?style=flat-square)](https://www.npmjs.com/package/@cyanheads/mcp-ts-core)\n\n

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\n\n**Public Hosted Server:** [https://usda.caseyjhand.com/mcp](https://usda.caseyjhand.com/mcp)\n\n

\n\n---\n\n## Tools\n\nFive tools covering the USDA FoodData Central workflow — from discovery to detailed nutrient analysis:\n\n| Tool | Description |\n|:---|:---|\n| `usda_search_foods` | Search foods by keyword across SR Legacy, Foundation, Survey FNDDS, and Branded data sources, with nutrient preview and pagination |\n| `usda_get_food` | Full nutrient profile for one food by FDC ID, with optional per-portion scaling (g, oz, lb, kg, or serving) |\n| `usda_get_foods` | Batch nutrient fetch for 2–20 FDC IDs in a single request; failed IDs reported in `failed[]` instead of aborting |\n| `usda_compare_foods` | Side-by-side nutrient comparison for 2–5 foods, formatted as a markdown table scaled to a common gram basis |\n| `usda_list_nutrients` | Static FDC nutrient reference table (~150 nutrients) with IDs, names, units, and categories — no API call required |\n\n### `usda_search_foods`\n\nSearch USDA FoodData Central foods by keyword, UPC/GTIN code, or ingredient.\n\n- Covers all FDC data sources: SR Legacy (common whole foods, complete nutrient profiles), Foundation, Survey FNDDS, and Branded (packaged products)\n- Defaults to SR Legacy; include `\"Branded\"` in `dataType` for packaged products or UPC lookup\n- Brand owner filter to narrow branded results (e.g. `\"General Mills\"`) — setting `brandOwner` without `dataType` searches Branded, since only Branded records carry a brand owner\n- Food category filter (e.g. `\"Poultry Products\"`, `\"Vegetables and Vegetable Products\"`)\n- Pagination via `pageSize` (up to 50) and `pageNumber`\n- Returns FDC IDs and a preview of key nutrients (energy, protein, fat, carbs) — use `usda_get_food` for the full profile\n\n---\n\n### `usda_get_food`\n\nFull nutrient profile for one food by FDC ID.\n\n- All available nutrients (or a filtered subset via `nutrients[]`) with amounts per 100g\n- Optional portion scaling — provide `quantity` + `unit` to scale values (e.g. `quantity=200, unit=\"g\"` → per-200g values)\n- `unit=\"serving\"` scales to the food's first defined portion weight\n- Returns all named portion definitions (`allPortions[]`) alongside the serving info\n- Filtering `nutrients[]` to specific IDs strongly reduces context size for common queries (use `usda_list_nutrients` to look up IDs)\n\n---\n\n### `usda_get_foods`\n\nBatch nutrient fetch for 2–20 FDC IDs.\n\n- All values per 100g (no portion scaling in batch mode)\n- `nutrients[]` filter strongly recommended — full profiles for 20 foods are large\n- Per-item partial failure: `failed[]` carries IDs that returned no data, so one missing food doesn't abort the batch\n- More efficient than N individual `usda_get_food` calls when you already have FDC IDs\n\n---\n\n### `usda_compare_foods`\n\nSide-by-side nutrient comparison for 2–5 foods.\n\n- Returns a pivot table — one row per nutrient, one column per food — and formats it as a markdown table\n- Defaults to the 12 most commonly compared nutrients (energy, protein, fat, saturated fat, carbs, fiber, total sugars, sodium, potassium, calcium, iron, vitamin C)\n- Pass custom `nutrients[]` for specific comparisons (e.g. just iron and vitamin C)\n- All values scaled to a common gram basis (default 100g; override with `quantity` + `unit`)\n- Proceeds with valid foods when some IDs aren't found — only fails when fewer than 2 IDs return data\n- Rows where all values are null (nutrient not tracked for any of the selected foods) are filtered out\n\n---\n\n### `usda_list_nutrients`\n\nFDC nutrient reference table — all ~150 tracked nutrients.\n\n- Returns IDs, names, SR reference numbers, units, and categories\n- Optional `category` filter: `macronutrients`, `vitamins`, `minerals`, `lipids`, `amino_acids`, `other`\n- Resolves nutrient names (e.g. `\"vitamin C\"`) to FDC IDs (1162) for use in `nutrients[]` params\n- Static data — no API call, instant response; call once and reuse the IDs\n\n## Resources and prompts\n\n| Type | Name | Description |\n|:---|:---|:---|\n| Resource | `usda://food/{fdcId}` | Full nutrient profile for a specific food by FDC ID — same data as `usda_get_food` without portion scaling |\n| Resource | `usda://nutrients` | Complete FDC nutrient reference list — all ~150 tracked nutrients with IDs, names, units, and categories |\n\nAll resource data is also reachable via tools. Use `usda_search_foods` to discover FDC IDs before reading food resources.\n\n## Features\n\nBuilt on [`@cyanheads/mcp-ts-core`](https://www.npmjs.com/package/@cyanheads/mcp-ts-core):\n\n- Declarative tool and resource definitions — single file per primitive, framework handles registration and validation\n- Unified error handling — handlers throw, framework catches, classifies, and formats\n- Pluggable auth: `none`, `jwt`, `oauth`\n- Swappable storage backends: `in-memory`, `filesystem`, `Supabase`, `Cloudflare KV/R2/D1`\n- Structured logging with optional OpenTelemetry tracing\n- STDIO and Streamable HTTP transports\n\nUSDA FDC-specific:\n\n- Type-safe client for the USDA FoodData Central REST API (`api.nal.usda.gov/fdc/v1`)\n- Normalization layer that handles inconsistent API response shapes across search, single-food, and batch endpoints\n- Batch API endpoint (`/foods`) with per-food partial failure reporting\n- HTML response detection (rate-limit proxy returns 200 HTML) with service-unavailable error surfacing\n- Static nutrient reference dictionary — ~150 nutrients with FDC IDs, SR numbers, units, and categories; no API call required\n\nAgent-friendly output:\n\n- Provenance preserved — FDC data source (`dataType`) on every food result so callers know whether they're reading curated research data or label-derived branded values\n- Partial failure reporting — batch tools (`usda_get_foods`, `usda_compare_foods`) return successes alongside structured `failed[]` / `missingData[]` entries rather than failing the whole request\n- Cross-reference hints — FDC IDs and tool names in descriptions so agents know exactly which call to make next (search → get → compare workflow)\n\n## Getting started\n\n### Public Hosted Instance\n\nA public instance is available at `https://usda.caseyjhand.com/mcp` — no installation required. Point any MCP client at it via Streamable HTTP:\n\n```json\n{\n \"mcpServers\": {\n \"usda-mcp-server\": {\n \"type\": \"streamable-http\",\n \"url\": \"https://usda.caseyjhand.com/mcp\"\n }\n }\n}\n```\n\n### Self-Hosted / Local\n\nAdd the following to your MCP client configuration file. See [data.gov API key signup](https://api.data.gov/signup/) to generate a free API key.\n\n```json\n{\n \"mcpServers\": {\n \"usda-mcp-server\": {\n \"type\": \"stdio\",\n \"command\": \"bunx\",\n \"args\": [\"@cyanheads/usda-mcp-server@latest\"],\n \"env\": {\n \"MCP_TRANSPORT_TYPE\": \"stdio\",\n \"MCP_LOG_LEVEL\": \"info\",\n \"USDA_FDC_API_KEY\": \"your-api-key\"\n }\n }\n }\n}\n```\n\nOr with npx (no Bun required):\n\n```json\n{\n \"mcpServers\": {\n \"usda-mcp-server\": {\n \"type\": \"stdio\",\n \"command\": \"npx\",\n \"args\": [\"-y\", \"@cyanheads/usda-mcp-server@latest\"],\n \"env\": {\n \"MCP_TRANSPORT_TYPE\": \"stdio\",\n \"MCP_LOG_LEVEL\": \"info\",\n \"USDA_FDC_API_KEY\": \"your-api-key\"\n }\n }\n }\n}\n```\n\nOr with Docker:\n\n```json\n{\n \"mcpServers\": {\n \"usda-mcp-server\": {\n \"type\": \"stdio\",\n \"command\": \"docker\",\n \"args\": [\n \"run\", \"-i\", \"--rm\",\n \"-e\", \"MCP_TRANSPORT_TYPE=stdio\",\n \"-e\", \"USDA_FDC_API_KEY=your-api-key\",\n \"ghcr.io/cyanheads/usda-mcp-server:latest\"\n ]\n }\n }\n}\n```\n\nFor Streamable HTTP, set the transport and start the server:\n\n```sh\nMCP_TRANSPORT_TYPE=http MCP_HTTP_PORT=3010 USDA_FDC_API_KEY=your-api-key bun run start:http\n# Server listens at http://localhost:3010/mcp\n```\n\n### Prerequisites\n\n- [Bun v1.3.2](https://bun.sh/) or higher (or Node.js v24+).\n- A free USDA FDC API key — register at [api.data.gov/signup](https://api.data.gov/signup/). Required for food search, lookup, and comparison calls; `usda_list_nutrients` and the static nutrient reference work without it.\n\n### Installation\n\n1. **Clone the repository:**\n\n```sh\ngit clone https://github.com/cyanheads/usda-mcp-server.git\n```\n\n2. **Navigate into the directory:**\n\n```sh\ncd usda-mcp-server\n```\n\n3. **Install dependencies:**\n\n```sh\nbun install\n```\n\n4. **Configure environment:**\n\n```sh\ncp .env.example .env\n# edit .env and set USDA_FDC_API_KEY\n```\n\n## Configuration\n\n| Variable | Description | Default |\n|:---------|:------------|:--------|\n| `USDA_FDC_API_KEY` | **Required for FoodData Central-backed tools** (search, get, batch, compare) — not for startup or `usda_list_nutrients`. Get a free key at [api.data.gov](https://api.data.gov/signup/). | — |\n| `MCP_TRANSPORT_TYPE` | Transport: `stdio` or `http`. | `stdio` |\n| `MCP_HTTP_PORT` | Port for HTTP server. | `3010` |\n| `MCP_AUTH_MODE` | Auth mode: `none`, `jwt`, or `oauth`. | `none` |\n| `MCP_LOG_LEVEL` | Log level (RFC 5424). | `info` |\n| `LOGS_DIR` | Directory for log files (Node.js only). | `/logs` |\n| `STORAGE_PROVIDER_TYPE` | Storage backend. | `in-memory` |\n| `OTEL_ENABLED` | Enable [OpenTelemetry instrumentation](https://github.com/cyanheads/mcp-ts-core/tree/main/docs/telemetry) (spans, metrics, completion logs). | `false` |\n\nSee [`.env.example`](https://github.com/cyanheads/usda-mcp-server/blob/main/.env.example) for the full list of optional overrides.\n\n## Running the server\n\n### Local development\n\n- **Build and run:**\n\n ```sh\n # One-time build\n bun run rebuild\n\n # Run the built server\n bun run start:stdio\n # or\n bun run start:http\n ```\n\n- **Run checks and tests:**\n\n ```sh\n bun run devcheck # Lint, format, typecheck, security\n bun run test # Vitest test suite\n bun run lint:mcp # Validate MCP definitions against spec\n ```\n\n### Docker\n\n```sh\ndocker build -t usda-mcp-server .\ndocker run --rm -e USDA_FDC_API_KEY=your-key -p 3010:3010 usda-mcp-server\n```\n\nThe Dockerfile defaults to HTTP transport, stateless session mode, and logs to `/var/log/usda-mcp-server`. OpenTelemetry peer dependencies are installed by default — build with `--build-arg OTEL_ENABLED=false` to omit them.\n\n## Project structure\n\n| Directory | Purpose |\n|:----------|:--------|\n| `src/index.ts` | `createApp()` entry point — registers tools, resources, and inits `FdcService`. |\n| `src/config` | Server-specific environment variable parsing and validation with Zod (`USDA_FDC_API_KEY`). |\n| `src/mcp-server/tools` | Tool definitions (`*.tool.ts`) — search, get, batch, compare, list-nutrients. |\n| `src/mcp-server/resources` | Resource definitions (`*.resource.ts`) — food profile and nutrient reference. |\n| `src/services/fdc` | `FdcService` — USDA FDC API client, normalization, and static nutrient reference data. |\n| `tests/` | Unit tests mirroring `src/` — 50 tests across all tools and resources. |\n\n## Development guide\n\nSee [`CLAUDE.md`](https://github.com/cyanheads/usda-mcp-server/blob/main/CLAUDE.md) for development guidelines and architectural rules. The short version:\n\n- Handlers throw, framework catches — no `try/catch` in tool logic\n- Use `ctx.log` for request-scoped logging, `ctx.state` for tenant-scoped storage\n- Register new tools and resources via the barrels in `src/mcp-server/*/definitions/index.ts`\n- Wrap external API calls: validate raw → normalize to domain type → return output schema; never fabricate missing fields\n\n## Contributing\n\nIssues and pull requests are welcome. Run checks and tests before submitting:\n\n```sh\nbun run devcheck\nbun run test\n```\n\n## License\n\nApache-2.0 — see [LICENSE](https://github.com/cyanheads/usda-mcp-server/blob/main/LICENSE) for details.\n","changelogMarkdown","videoKey","requiredSecretsJson","publishedAt","priceCents","trialDays",0,"upstream",{"_107":108,"_109":110,"_111":112,"_113":114,"_115":116,"_117":118},"requiredSecrets",[],"tags",[98,99,100,101,102,103,104,63,105,106],"assets",[],"stats",{"_96":85,"_97":85},"ratingAvg","reviewCount","bun","fdc","food","fooddata-central","nutrients","nutrition","stdio","typescript","usda","topics",[98,99,100,101,124,125,126,102,103,104,63,105,106],"license","Apache-2.0","language","TypeScript","registryName","io.github.cyanheads/usda-mcp-server","homepage","https://www.npmjs.com/package/@cyanheads/usda-mcp-server","packages",[119,120],{"_121":122,"_123":22,"_75":76},{"_121":122,"_123":22,"_75":76},"registryType","npm","identifier","mcp","mcp-server","model-context-protocol","ENV",{"_129":130,"_131":132,"_133":134},"ENVIRONMENT","production","TURNSTILE_SITE_KEY","0x4AAAAAAB8-rEI2gNDf_QhU","SENTRY_DSN","https://45fd1229f78089d5c3ee78be128030e1@o4510583261757440.ingest.de.sentry.io/4510584253448272"]