{
  "schema": "kallipolis.resource-quality.v1",
  "id": "resource.public-data.usda-fooddata-central-api",
  "version": "1.0.0",
  "title": "USDA FoodData Central API boundary",
  "summary": "Official-source access, authentication, request-shaping, paging, freshness, legal, and interpretation boundaries for USDA FoodData Central API.",
  "content": {
    "kind": "public-data-api-boundary",
    "facts": [
      {
        "id": "fact.usda.fooddata-central-api.access",
        "statement": "FoodData Central provides REST endpoints for food search, food details, multiple foods, and paged food listings across documented data types.",
        "normativeLevel": "informative",
        "sourceIds": [
          "source.usda.fooddata-central-api"
        ]
      },
      {
        "id": "fact.usda.fooddata-central-api.authentication",
        "statement": "Every request requires a data.gov API key; DEMO_KEY is limited to initial exploration, and assigned keys must not be exposed in public code or records.",
        "normativeLevel": "informative",
        "sourceIds": [
          "source.usda.fooddata-central-api"
        ]
      },
      {
        "id": "fact.usda.fooddata-central-api.request",
        "statement": "Clients must bind food identifiers, query terms, data types, fields, page size, and sort behavior and use the data-type documentation to interpret nutrients.",
        "normativeLevel": "informative",
        "sourceIds": [
          "source.usda.fooddata-central-api"
        ]
      },
      {
        "id": "fact.usda.fooddata-central-api.boundary",
        "statement": "Food and nutrient data can vary by source, formulation, serving, and release and is not personalized dietary or medical advice or proof of a product label value.",
        "normativeLevel": "informative",
        "sourceIds": [
          "source.usda.fooddata-central-api"
        ]
      }
    ]
  },
  "language": "en",
  "category": "public-data-api",
  "state": "prepared",
  "canonicalUrl": "https://platoskallipolis.com/resources/public-data-apis/usda-fooddata-central-api.json",
  "contentHash": "sha256:c8d5f9e846bade5bee4e7673c20cbd12bbff2f624fe5813527861988eacab274",
  "owner": {
    "id": "platos-kallipolis",
    "name": "Plato's Kallipolis",
    "type": "organization",
    "accountabilityUrl": "https://platoskallipolis.com/about"
  },
  "access": {
    "mode": "public",
    "url": "https://platoskallipolis.com/resources/public-data-apis/usda-fooddata-central-api.json",
    "authentication": "none",
    "robotsAllowed": true
  },
  "provenance": {
    "method": "primary-source",
    "sources": [
      {
        "id": "source.usda.fooddata-central-api",
        "url": "https://fdc.nal.usda.gov/api-guide/",
        "title": "FoodData Central API Guide",
        "publisher": "U.S. Department of Agriculture",
        "observedAt": "2026-08-27T09:30:00Z"
      }
    ]
  },
  "observedAt": "2026-08-27T09:30:00Z",
  "freshness": {
    "policy": "max-age",
    "state": "current",
    "nextReviewAt": "2026-09-03T09:30:00Z",
    "maxAgeSeconds": 604800
  },
  "license": {
    "id": "source-terms-apply",
    "url": "https://fdc.nal.usda.gov/api-guide/",
    "redistributionAllowed": false
  },
  "evidence": [
    {
      "id": "evidence.usda.fooddata-central-api",
      "type": "source-claim",
      "url": "https://fdc.nal.usda.gov/api-guide/",
      "observedAt": "2026-08-27T09:30:00Z"
    }
  ]
}