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@cyanheads/openfoodfacts-mcp-server

Look up food products by barcode, search by ingredient or nutrition filter, compare products side-by-side, and browse the canonical tag vocabulary via MCP. STDIO or Streamable HTTP.\n

4 Tools

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\n\n[![Version](https://img.shields.io/badge/Version-0.1.5-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/openfoodfacts-mcp-server) [![MCP SDK](https://img.shields.io/badge/MCP%20SDK-^1.29.0-green.svg?style=flat-square)](https://modelcontextprotocol.io/) [![npm](https://img.shields.io/npm/v/@cyanheads/openfoodfacts-mcp-server?style=flat-square&logo=npm&logoColor=white)](https://www.npmjs.com/package/@cyanheads/openfoodfacts-mcp-server) [![TypeScript](https://img.shields.io/badge/TypeScript-^6.0.3-3178C6.svg?style=flat-square)](https://www.typescriptlang.org/) [![Bun](https://img.shields.io/badge/Bun-v1.3.0-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/openfoodfacts-mcp-server/releases/latest/download/openfoodfacts-mcp-server.mcpb) [![Install in Cursor](https://cursor.com/deeplink/mcp-install-dark.svg)](https://cursor.com/en/install-mcp?name=openfoodfacts-mcp-server&config=eyJjb21tYW5kIjoibnB4IiwiYXJncyI6WyIteSIsIkBjeWFuaGVhZHMvb3BlbmZvb2RmYWN0cy1tY3Atc2VydmVyIl19) [![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%22openfoodfacts-mcp-server%22%2C%22command%22%3A%22npx%22%2C%22args%22%3A%5B%22-y%22%2C%22%40cyanheads%2Fopenfoodfacts-mcp-server%22%5D%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://openfoodfacts.caseyjhand.com/mcp](https://openfoodfacts.caseyjhand.com/mcp)\n\n

\n\n---\n\n## Tools\n\nFour tools for working with [Open Food Facts](https://world.openfoodfacts.org/) — a free, crowd-sourced database of 3M+ packaged food products:\n\n| Tool | Description |\n|:-----|:------------|\n| `off_get_product` | Fetch a packaged food product by barcode. Returns name, brand, quantity, ingredients, allergens, additives, Nutri-Score, NOVA group, Green-Score, nutrition per 100g/serving, categories, labels, and data completeness. |\n| `off_search_products` | Search by text query and/or structured tag filters (category, brand, label, Nutri-Score grade, NOVA group, country). Returns summary rows with barcodes for follow-up lookups. |\n| `off_compare_products` | Side-by-side nutrition and scoring comparison for 2–10 products by barcode. Returns a normalized table of energy, macros, salt, Nutri-Score, NOVA, and Green-Score. |\n| `off_browse_taxonomy` | Browse and search the canonical tag vocabulary (categories, labels, allergens, additives, countries, NOVA groups, Nutri-Score grades) for use as filter values in `off_search_products`. |\n\n### `off_get_product`\n\nFetch a packaged food product by barcode (EAN-13 or UPC).\n\n- Accepts 8–14 digit barcodes (EAN-13, EAN-8, UPC-A, UPC-E)\n- Returns ingredients (raw text and parsed list with percent estimates, vegan/vegetarian flags), all 14 major allergens as tag IDs, E-number additives, Nutri-Score a–e, NOVA 1–4, Green-Score/Eco-Score, full nutriments per 100g and per serving, categories/labels/packaging/origins as canonical tag IDs, front image URL, and data completeness score (0–1)\n- Optional `fields` parameter restricts the response to a subset (e.g., scores only, or nutrition only)\n- Open Food Facts is crowd-sourced — a missing field means \"not yet entered by contributors,\" not that the attribute is absent from the actual product\n- `found: false` means no contributor has recorded this barcode yet — not a product defect\n\n---\n\n### `off_search_products`\n\nSearch Open Food Facts by text and/or structured tag filters.\n\n- Full-text search across product names, brands, and ingredients\n- Structured filters: `categories_tag`, `brands_tag`, `labels_tag`, `nutrition_grade` (a–e), `nova_group` (1–4), `countries_tag`\n- All filter values are canonical tag IDs — use `off_browse_taxonomy` to resolve human terms (e.g., \"organic\" → `en:organic`)\n- Pagination via `page` (1-based) and `page_size` (1–50, default 20); response includes `total` count for computing total pages\n- Returns summary rows (barcode, name, brand, Nutri-Score, NOVA, categories) — use `off_get_product` for full label data\n- Result counts reflect contributed products, not total products on the market\n- Search rate-limited to ~10 requests/min by the Open Food Facts API\n\n---\n\n### `off_compare_products`\n\nSide-by-side nutrition and scoring comparison for 2–10 barcodes.\n\n- Fetches all products in parallel\n- Returns a normalized comparison table: energy (kcal/100g), fat, saturated fat, sugars, salt, protein, fiber, Nutri-Score, NOVA group, and Green-Score\n- Missing nutrition data is preserved as `null` — comparisons are not imputed or estimated\n- `not_found` list identifies barcodes with no contributor record (partial results are not an error)\n\n---\n\n### `off_browse_taxonomy`\n\nBrowse the canonical Open Food Facts tag vocabulary before building `off_search_products` filters.\n\n- Facets: `categories`, `labels`, `allergens`, `additives`, `countries`, `nova_groups`, `nutrition_grades`\n- Optional `search` parameter: case-insensitive substring match against tag ID or display name (e.g., `\"gluten\"` → `en:gluten`, `en:no-gluten`, `en:no-added-gluten`)\n- Taxonomy is embedded (not fetched live) because the OFF taxonomy API is unavailable to anonymous bot clients at current traffic levels\n- Categories facet has 200K+ entries — always include a `search` term when browsing categories\n- `limit` controls results returned (1–100, default 20)\n\n---\n\n## Features\n\nBuilt on [`@cyanheads/mcp-ts-core`](https://www.npmjs.com/package/@cyanheads/mcp-ts-core):\n\n- Declarative tool definitions — single file per tool, 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\nOpen Food Facts-specific:\n\n- No API key required — the identifying `User-Agent` header (required by OFF terms) is baked into the service layer\n- Token-bucket rate limiting per endpoint class: product reads (~100/min), search (~10/min)\n- Automatic retry (3 attempts, 500ms base) with HTML error page detection for 503 during high load\n- Nutriments normalized from raw hyphenated keys (`energy-kcal_100g`) to underscore form — only the `_100g` and `_serving` variants are returned\n- Embedded tag taxonomy for `off_browse_taxonomy` — curated 200+ category subset, full allergen/label/additive vocabularies\n\nAgent-friendly output:\n\n- `found` field on every product response — explicit `false` when a barcode has no contributor record, not a thrown error\n- Missing fields signal incomplete crowd-sourced data, not product attribute absence — surfaced in descriptions and format output\n- Computed scores (Nutri-Score, NOVA, Green-Score) returned as-is with regional caveat notes — not interpreted or normalized to health claims\n- `not_found` list in `off_compare_products` allows partial batch comparisons without request failure\n\n## Getting started\n\n### Public Hosted Instance\n\nA public instance is available at `https://openfoodfacts.caseyjhand.com/mcp` — no installation required. Point any MCP client at it via Streamable HTTP:\n\n```json\n{\n \"mcpServers\": {\n \"openfoodfacts-mcp-server\": {\n \"type\": \"streamable-http\",\n \"url\": \"https://openfoodfacts.caseyjhand.com/mcp\"\n }\n }\n}\n```\n\n### Self-Hosted / Local\n\nNo API key is required. Add the following to your MCP client configuration file.\n\n```json\n{\n \"mcpServers\": {\n \"openfoodfacts-mcp-server\": {\n \"type\": \"stdio\",\n \"command\": \"bunx\",\n \"args\": [\"@cyanheads/openfoodfacts-mcp-server@latest\"],\n \"env\": {\n \"MCP_TRANSPORT_TYPE\": \"stdio\",\n \"MCP_LOG_LEVEL\": \"info\"\n }\n }\n }\n}\n```\n\nOr with npx (no Bun required):\n\n```json\n{\n \"mcpServers\": {\n \"openfoodfacts-mcp-server\": {\n \"type\": \"stdio\",\n \"command\": \"npx\",\n \"args\": [\"-y\", \"@cyanheads/openfoodfacts-mcp-server@latest\"],\n \"env\": {\n \"MCP_TRANSPORT_TYPE\": \"stdio\",\n \"MCP_LOG_LEVEL\": \"info\"\n }\n }\n }\n}\n```\n\nOr with Docker:\n\n```json\n{\n \"mcpServers\": {\n \"openfoodfacts-mcp-server\": {\n \"type\": \"stdio\",\n \"command\": \"docker\",\n \"args\": [\n \"run\", \"-i\", \"--rm\",\n \"-e\", \"MCP_TRANSPORT_TYPE=stdio\",\n \"ghcr.io/cyanheads/openfoodfacts-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 bun run start:http\n# Server listens at http://localhost:3010/mcp\n```\n\n### Prerequisites\n\n- [Bun v1.3.0](https://bun.sh/) or higher (or Node.js v24+).\n- No API key needed. The server sends an identifying `User-Agent` to comply with Open Food Facts' terms of service — this is baked in and requires no configuration.\n\n### Installation\n\n1. **Clone the repository:**\n\n```sh\ngit clone https://github.com/cyanheads/openfoodfacts-mcp-server.git\n```\n\n2. **Navigate into the directory:**\n\n```sh\ncd openfoodfacts-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 if you need to override rate limits or the base URL\n```\n\n## Configuration\n\nAll configuration is validated at startup via Zod schemas in `src/config/server-config.ts`.\n\n| Variable | Description | Default |\n|:---------|:------------|:--------|\n| `OFF_BASE_URL` | Open Food Facts API base URL. Override for local testing against a mock server. | `https://world.openfoodfacts.org` |\n| `OFF_RATE_LIMIT_PRODUCT` | Product read rate limit (requests/min). | `100` |\n| `OFF_RATE_LIMIT_SEARCH` | Search rate limit (requests/min). | `10` |\n| `MCP_TRANSPORT_TYPE` | Transport: `stdio` or `http`. | `stdio` |\n| `MCP_HTTP_PORT` | HTTP server port. | `3010` |\n| `MCP_AUTH_MODE` | Auth mode: `none`, `jwt`, or `oauth`. | `none` |\n| `MCP_LOG_LEVEL` | Log level (`debug`, `info`, `warning`, `error`). | `info` |\n| `LOGS_DIR` | Log file directory (Node.js only). | `/logs` |\n| `OTEL_ENABLED` | Enable [OpenTelemetry instrumentation](https://github.com/cyanheads/mcp-ts-core/tree/main/docs/telemetry). | `false` |\n\nSee [`.env.example`](https://github.com/cyanheads/openfoodfacts-mcp-server/blob/main/.env.example) for the full list of optional overrides.\n\n> **Attribution:** Open Food Facts data is released under the [Open Database License (ODbL) 1.0](https://opendatacommons.org/licenses/odbl/1.0/). Downstream use must cite [Open Food Facts](https://world.openfoodfacts.org/).\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 openfoodfacts-mcp-server .\ndocker run --rm -p 3010:3010 openfoodfacts-mcp-server\n```\n\nThe Dockerfile defaults to HTTP transport, stateless session mode, and logs to `/var/log/openfoodfacts-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 and inits services. |\n| `src/config` | Server-specific environment variable parsing and validation with Zod. |\n| `src/mcp-server/tools` | Tool definitions (`*.tool.ts`). |\n| `src/services/openfoodfacts` | Open Food Facts API client — HTTP, rate limiting, retry, field normalization. |\n| `src/services/taxonomy` | Embedded tag vocabulary service for `off_browse_taxonomy`. |\n| `tests/` | Unit and integration tests mirroring `src/`. |\n\n## Development guide\n\nSee [`CLAUDE.md`](https://github.com/cyanheads/openfoodfacts-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 via the barrel in `src/mcp-server/tools/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/openfoodfacts-mcp-server/blob/main/LICENSE) for details.\n","changelogMarkdown","videoKey","requiredSecretsJson","publishedAt","priceCents","trialDays",0,"categoryDisplayName","Developer Tools","upstream",{"_98":99,"_100":101,"_102":103,"_104":105,"_106":107},"requiredSecrets",[],"tags",[],"assets",[],"stats",{"_96":83,"_97":83},"ratingAvg","reviewCount","topics",[108,109,110,19,111,112,113,114,115,116,117],"license","Apache-2.0","language","TypeScript","registryName","io.github.cyanheads/openfoodfacts-mcp-server","homepage","https://www.npmjs.com/package/@cyanheads/openfoodfacts-mcp-server","ai-agents","ai-tools","barcode","food","mcp","mcp-server","model-context-protocol","nutrition","openfoodfacts","typescript","ENV",{"_120":121,"_122":123,"_124":125},"ENVIRONMENT","production","TURNSTILE_SITE_KEY","0x4AAAAAAB8-rEI2gNDf_QhU","SENTRY_DSN","https://45fd1229f78089d5c3ee78be128030e1@o4510583261757440.ingest.de.sentry.io/4510584253448272"]