National Institute of Standards and Technology (NIST)

APIs provided by the National Institute of Standards and Technology for accessing scientific and technical data, standards, and research information including vulnerability databases, chemistry data, and time services.

National Institute of Standards and Technology (NIST) publishes 6 API contracts indexed on the APIs.io network, including Cves API, CPE API, CVE History API, and 3 more. Tagged areas include Cybersecurity, Government, Measurements, Research, and Scientific Data.

The National Institute of Standards and Technology (NIST) catalog on APIs.io includes 1 Spectral governance ruleset.

National Institute of Standards and Technology (NIST)’s developer surface includes authentication, engineering blog, developer portal, documentation, and 8 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

28.8/100 thin ▬ flat Agent 21/100 agent aware Front door AI 3/6 light Heartbeat 98/100 alive Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreeSelf serve⚡ Free to try

2 published contracts

Cybersecurity Government Measurements Research Scientific Data Standards

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Cybersecurity Management

BC-620

CPECvehistoryCves

GET /cves/2.0 GET /cvehistory/2.0

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 28.8/100 · thin

Contract Quality 10.7 / 21

Developer Ergonomics 5.7 / 17

Access Clarity 0.9 / 17

Operational Transparency 1.2 / 11

Contract Governance 1.4 / 10

Discoverability 4.9 / 9

Regulatory Posture 1.8 / 15

Agent readiness — 21/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 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 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Government & Public Sector 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.

Create-or-Update Ergonomics does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)

6 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 5.3 — up to +18.9 composite points
Developer Ergonomics scores 33.3 — up to +13.3 composite points
Contract Quality scores 50.2 — up to +12.5 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/nist/apis.yml: open an issue on github.com/api-evangelist/nist to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 6

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

NIST Chemistry WebBook API

Access to chemical and physical property data for thousands of chemical species.

NIST Data Gateway

Provides access to NIST's scientific and technical databases across multiple domains.

NIST Time API

Provides access to official NIST time services for time synchronization.

National Institute of Standards and Technology (NIST) Cves API

The Cves API from National Institute of Standards and Technology (NIST) — 1 operation(s) for cves.

National Institute of Standards and Technology (NIST) CPE API

Common Platform Enumeration

National Institute of Standards and Technology (NIST) CVE History API

The CVE History API from National Institute of Standards and Technology (NIST) — 1 operation(s) for cve history.

Open Collections 3

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

NIST NVD CVE Cvehistory API

OPEN COLLECTION

NIST NVD CVE Cvehistory Cves API

OPEN COLLECTION

NIST NVD CVE API

OPEN COLLECTION

National Institute of Standards and Technology (NIST) API pricing

Not yet checked against National Institute of Standards and Technology (NIST)'s own pricing page. Compiled by API Evangelist on 2026-05-05 from nvd.nist.gov/developers/start-here; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
NIST Public APIs — Anonymous freemium	Free
NIST Public APIs — API Key freemium	Free

Plan details, limits and sources →

Rate limits

NVD API — Anonymous: 5 requests per 30 seconds
NVD API — API Key: 50 requests per 30 seconds
Other NIST APIs (Chemistry WebBook, Time Service, etc.): see firewall fair-use policy requests per second

Compiled by API Evangelist, not yet checked against National Institute of Standards and Technology (NIST)'s documentation. Rate-limit details →

Pricing Plans 1

Published pricing tiers and plan structures.

Nist Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Nist Rate Limits

3 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

National Institute of Standards and Technology (NIST)

SLA

FinOps 1

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

Nist Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

National Institute of Standards and Technology (NIST) API Rules

53 rules · 51 errors 1 warnings 1 info

SPECTRAL

Security Posture 2

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

Nist Authentication

apiKey · 1 scheme

SECURITY

Nist Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Agentic Access 1

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

Nist Agentic Access

2 operations

2 operations · 0 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

Portal

Portal

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

aid: nist
name: National Institute of Standards and Technology (NIST)
description: APIs provided by the National Institute of Standards and Technology for accessing scientific and technical data,
  standards, and research information including vulnerability databases, chemistry data, and time services.
type: Index
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: true
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: free
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Free · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/nist.png
tags:
- Cybersecurity
- Government
- Measurements
- Research
- Scientific Data
- Standards
url: https://raw.githubusercontent.com/api-evangelist/nist/refs/heads/main/apis.yml
created: '2024-01-01'
modified: '2026-09-16'
specificationVersion: '0.23'
apis:
- aid: nist:nist-chemistry-webbook-api
  name: NIST Chemistry WebBook API
  description: Access to chemical and physical property data for thousands of chemical species.
  humanURL: https://webbook.nist.gov/chemistry/
  baseURL: https://webbook.nist.gov/cgi
  tags:
  - Chemistry
  - Physical Properties
  - Scientific Data
  properties:
  - type: Documentation
    url: https://webbook.nist.gov/chemistry/form-ser/
- aid: nist:nist-data-gateway
  name: NIST Data Gateway
  description: Provides access to NIST's scientific and technical databases across multiple domains.
  humanURL: https://data.nist.gov
  baseURL: https://data.nist.gov
  tags:
  - Open Data
  - Research Data
  - Scientific Data
  properties:
  - type: Documentation
    url: https://data.nist.gov/sdp/#/
- aid: nist:nist-time-api
  name: NIST Time API
  description: Provides access to official NIST time services for time synchronization.
  humanURL: https://www.nist.gov/pml/time-and-frequency-division/time-distribution/internet-time-service-its
  tags:
  - Standards
  - Synchronization
  - Time
  properties:
  - type: Documentation
    url: https://tf.nist.gov/tf-cgi/servers.cgi
- aid: nist:nist-cves-api
  name: National Institute of Standards and Technology (NIST) Cves API
  description: The Cves API from National Institute of Standards and Technology (NIST) — 1 operation(s) for cves.
  humanURL: https://nvd.nist.gov/developers/vulnerabilities
  baseURL: https://services.nvd.nist.gov/rest/json
  tags:
  - CVEs
  tags_raw:
  - Cves
  properties:
  - type: OpenAPI
    url: openapi/nist-cves-api-openapi.yml
  - type: Documentation
    url: https://nvd.nist.gov/developers/vulnerabilities
  - type: Authentication
    url: https://nvd.nist.gov/developers/request-an-api-key
- aid: nist:nist-cpe-api
  name: National Institute of Standards and Technology (NIST) CPE API
  description: Common Platform Enumeration
  humanURL: https://webbook.nist.gov/chemistry/
  baseURL: https://webbook.nist.gov/cgi
  tags:
  - CPE
  properties:
  - type: OpenAPI
    url: openapi/nist-cpe-api-openapi.yml
  - type: Documentation
    url: https://nvd.nist.gov/developers/vulnerabilities
  - type: Authentication
    url: https://nvd.nist.gov/developers/request-an-api-key
  - type: Documentation
    url: https://nvd.nist.gov/developers
  - type: Documentation
    url: https://nvd.nist.gov/developers/products
- aid: nist:nist-cve-history-api
  name: National Institute of Standards and Technology (NIST) CVE History API
  description: The CVE History API from National Institute of Standards and Technology (NIST) — 1 operation(s) for cve history.
  humanURL: https://webbook.nist.gov/chemistry/
  baseURL: https://webbook.nist.gov/cgi
  tags:
  - CVE History
  properties:
  - type: OpenAPI
    url: openapi/nist-cve-history-api-openapi.yml
  - type: Documentation
    url: https://nvd.nist.gov/developers/vulnerabilities
  - type: Authentication
    url: https://nvd.nist.gov/developers/request-an-api-key
  - type: Documentation
    url: https://nvd.nist.gov/developers
  - type: Documentation
    url: https://nvd.nist.gov/developers/products
common:
- type: Plans
  url: plans/nist-plans-pricing.yml
- type: RateLimits
  url: rate-limits/nist-rate-limits.yml
- type: FinOps
  url: finops/nist-finops.yml
- type: CapabilityMap
  url: capabilities/nist-capability-edges.yml
  name: National Institute of Standards and Technology (NIST) Business Capability Map
- type: Website
  url: https://nist.gov
- type: AgenticAccess
  url: agentic-access/nist-agentic-access.yml
- type: DomainSecurity
  url: security/nist-domain-security.yml
- type: Authentication
  url: authentication/nist-authentication.yml
- url: https://www.nist.gov/news-events/news/rss.xml
  type: Blog
- type: GitHubOrganization
  url: https://github.com/usnistgov
- type: Portal
  url: https://nvd.nist.gov/developers
- type: Documentation
  url: https://nvd.nist.gov/developers/vulnerabilities
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

National Institute of Standards and Technology (NIST) API — frequently asked questions

Does National Institute of Standards and Technology (NIST) have an API?

Yes. APIs.io lists 6 APIs from National Institute of Standards and Technology (NIST), including NIST Chemistry WebBook API, NIST Data Gateway and NIST Time API, and 3 more.

Is there an OpenAPI specification for the National Institute of Standards and Technology (NIST) API?

Yes. APIs.io indexes 3 OpenAPI specifications for National Institute of Standards and Technology (NIST), each linked for download from this page.

How do I authenticate with the National Institute of Standards and Technology (NIST) API?

National Institute of Standards and Technology (NIST) uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Nist Authentication.

How much does the National Institute of Standards and Technology (NIST) API cost?

APIs.io lists 2 pricing plans for National Institute of Standards and Technology (NIST), with each plan's price, limits and inclusions under Pricing on this page.

Is the National Institute of Standards and Technology (NIST) API ready for AI agents?

National Institute of Standards and Technology (NIST) has a Kin Score of 28.8 out of 100 (thin) and an Agent Readiness score of 20.7 (agent-aware), scored by API Evangelist on 2026-11-06.

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