National Agricultural Library website screenshot

National Agricultural Library

The USDA National Agricultural Library houses one of the world's largest collections devoted to agriculture and its related sciences, and operates FoodData Central, an integrated data system providing nutrient profiles for foods.

National Agricultural Library publishes 1 API on the APIs.io network: FDC API. Tagged areas include Agriculture, Federal-Government, Library, Food, and Nutrition.

National Agricultural Library’s developer surface includes authentication, developer portal, and 4 more developer resources.

🌐 Visit website 📡 Source on GitHub
28.9/100 thin ▬ flat Agent 32/100 agent aware Full breakdown ↓
scored 2026-08-21 · rubric v0.12.0
AccessFreemiumSelf serve⚡ Free to try
1 APIs
AgricultureFederal-GovernmentLibraryFoodNutrition

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-21 · rubric v0.12.0
Composite quality — 28.9/100 · thin
Contract Quality 11.6 / 21
Developer Ergonomics 3.6 / 17
Access Clarity 2.7 / 17
Operational Transparency 0.9 / 11
Contract Governance 0.0 / 10
Discoverability 6.5 / 9
Regulatory Posture 3.3 / 15
Agent readiness — 32/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 7 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Regulatory Posture applies to this provider. Its tags matched the Education & Research regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.
The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/national-agricultural-library: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

National Agricultural Library FDC API

endpoints to retrieve nutrient data

Open Collections 3

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Food Data Central FDC API

OPEN COLLECTION

Food Data Central API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

National Agricultural Library Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

National Agricultural Library Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

National Agricultural Library Finops

FINOPS

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

National Agricultural Library Authentication

apiKey · 1 scheme

SECURITY

National Agricultural Library Domain Security

TLSv1.2 · HSTS · DNSSEC · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

National Agricultural Library Agentic Access

9 operations · 3 acting

9 operations · 3 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

Portal
Portal

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Company 2

The organization behind the API

LinkedIn
LinkedIn
 Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: national-agricultural-library
name: National Agricultural Library
description: The USDA National Agricultural Library houses one of the world's largest collections devoted to agriculture and
  its related sciences, and operates FoodData Central, an integrated data system providing nutrient profiles for foods.
type: Index
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/national-agricultural-library.png
url: https://www.nal.usda.gov/
created: '2024-11-21'
modified: '2026-05-19'
specificationVersion: '0.23'
tags:
- Agriculture
- Federal-Government
- Library
- Food
- Nutrition
tags_raw:
- Agriculture
- Federal Government
- Library
- Food
- Nutrition
apis:
- aid: national-agricultural-library:national-agricultural-library-fdc-api
  name: National Agricultural Library FDC API
  description: endpoints to retrieve nutrient data
  humanURL: https://fdc.nal.usda.gov/api-guide
  baseURL: https://api.nal.usda.gov/fdc/v1
  tags:
  - FDC
  properties:
  - type: OpenAPI
    url: openapi/national-agricultural-library-fdc-api-openapi.yml
  - type: Documentation
    url: https://fdc.nal.usda.gov/api-guide
  - type: Signup
    url: https://fdc.nal.usda.gov/api-key-signup
common:
- type: AgenticAccess
  url: agentic-access/national-agricultural-library-agentic-access.yml
- type: DomainSecurity
  url: security/national-agricultural-library-domain-security.yml
- type: Authentication
  url: authentication/national-agricultural-library-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/national-agricultural-library
- type: Website
  url: https://www.nal.usda.gov/
- type: Portal
  url: https://fdc.nal.usda.gov/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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