National Geospatial-Intelligence Agency

The National Geospatial-Intelligence Agency (NGA) is a combat support agency within the U.S. Department of Defense that provides geospatial intelligence in support of national security. Through its Office of Geomatics, NGA publishes the Earth-Info portal, which exposes a REST API in OpenAPI format for downloading GPS ephemeris products, Earth Orientation Parameter Predictions (EOPP), Navdata clock state files, and short-term orbit prediction products. NGA also maintains the WGS 84 reference frame, EGM2008 gravitational model, and the GEOTRANS coordinate conversion tool.

National Geospatial-Intelligence Agency publishes 4 API contracts indexed on the APIs.io network, including Clock API, EOPP API, Ephemeris API, and 1 more. Tagged areas include Federal Government, Geospatial, Intelligence, Defense, and Geomatics.

The National Geospatial-Intelligence Agency catalog on APIs.io includes 1 Spectral governance ruleset.

National Geospatial-Intelligence Agency’s developer surface includes engineering blog, developer portal, and 11 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

25.2/100 emerging ▬ flat Agent 20/100 agent aware Front door AI 2/6 trace Heartbeat 85/100 alive Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemium

1 published contract

Federal Government Geospatial Intelligence DefenseGeomatics

Kin Score

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

Composite quality — 25.2/100 · emerging

Contract Quality 9.2 / 21

Developer Ergonomics 3.6 / 17

Access Clarity 1.3 / 17

Operational Transparency 1.2 / 11

Contract Governance 1.4 / 10

Discoverability 5.6 / 9

Regulatory Posture 0.9 / 15

Agent readiness — 20/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 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
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
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

7 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 7.9 — up to +18.4 composite points
Developer Ergonomics scores 21.4 — up to +15.7 composite points
Contract Quality scores 43.5 — up to +14.1 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/national-geospatial-intelligence-agency/apis.yml: open an issue on github.com/api-evangelist/national-geospatial-intelligence-agency 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
US Federal API Programs (api.data.gov, Login.gov, GSA MAS, FedRAMP)	undeclared	-	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

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 4

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

National Geospatial-Intelligence Agency Clock API

Navdata clock state files.

National Geospatial-Intelligence Agency EOPP API

Earth Orientation Parameter Predictions in multiple formats.

National Geospatial-Intelligence Agency Ephemeris API

GPS ephemeris products, including Center of Mass and Antenna Phase Center variants.

National Geospatial-Intelligence Agency Orbit API

Short-term orbit prediction products.

Open Collections 5

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

NGA Earth-Info REST Clock API

OPEN COLLECTION

NGA Earth-Info REST Clock EOPP API

OPEN COLLECTION

NGA Earth-Info REST Clock Ephemeris API

OPEN COLLECTION

NGA Earth-Info REST Clock Orbit API

OPEN COLLECTION

NGA Earth-Info REST API

OPEN COLLECTION

National Geospatial-Intelligence Agency API pricing

Not yet checked against National Geospatial-Intelligence Agency's own pricing page. Compiled by API Evangelist on 2026-05-04; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free freemium	Free
Professional paid	Free
Enterprise enterprise	—

Plan details, limits and sources →

Rate limits

Free Tier Default: 10 requests per minute
Free Tier Monthly Quota: 1000 requests per month
Professional Tier Default: 100 requests per minute

Compiled by API Evangelist, not yet checked against National Geospatial-Intelligence Agency's documentation. All 5 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

National Geospatial Intelligence Agency Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

National Geospatial Intelligence Agency Rate Limits

5 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 Geospatial-Intelligence Agency

SLA

FinOps 1

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

National Geospatial Intelligence Agency Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

National Geospatial-Intelligence Agency API Rules

48 rules · 46 errors 1 warnings 1 info

SPECTRAL

Security Posture 1

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

National Geospatial Intelligence Agency Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Agentic Access 1

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

National Geospatial Intelligence Agency Agentic Access

6 operations

6 operations · 0 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

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

Contact

Contact

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 4

The organization behind the API

Blog

Blog

BlogRSS

BlogRSS

LinkedIn

Website

Website

Other 1

Properties that don't map to a standard resource type

Tearline

Tearline

Source (apis.yml)

aid: national-geospatial-intelligence-agency
name: National Geospatial-Intelligence Agency
description: The National Geospatial-Intelligence Agency (NGA) is a combat support agency within the U.S. Department of Defense
  that provides geospatial intelligence in support of national security. Through its Office of Geomatics, NGA publishes the
  Earth-Info portal, which exposes a REST API in OpenAPI format for downloading GPS ephemeris products, Earth Orientation
  Parameter Predictions (EOPP), Navdata clock state files, and short-term orbit prediction products. NGA also maintains the
  WGS 84 reference frame, EGM2008 gravitational model, and the GEOTRANS coordinate conversion tool.
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: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/national-geospatial-intelligence-agency.png
url: https://raw.githubusercontent.com/api-evangelist/national-geospatial-intelligence-agency/refs/heads/main/apis.yml
created: '2024-12-25'
modified: '2026-10-06'
specificationVersion: '0.23'
tags:
- Federal Government
- Geospatial
- Intelligence
- Defense
- Geomatics
tags_raw:
- Federal Government
- Geospatial
- Intelligence
- Defense
- Geomatics
- Federal-Government
apis:
- aid: national-geospatial-intelligence-agency:national-geospatial-intelligence-agency-clock-api
  name: National Geospatial-Intelligence Agency Clock API
  description: Navdata clock state files.
  humanURL: https://earth-info.nga.mil/
  baseURL: https://earth-info.nga.mil/
  tags:
  - Clock
  properties:
  - type: OpenAPI
    url: openapi/national-geospatial-intelligence-agency-clock-api-openapi.yml
  - type: Documentation
    url: https://earth-info.nga.mil/
  - type: Portal
    url: https://earth-info.nga.mil/
- aid: national-geospatial-intelligence-agency:national-geospatial-intelligence-agency-eopp-api
  name: National Geospatial-Intelligence Agency EOPP API
  description: Earth Orientation Parameter Predictions in multiple formats.
  humanURL: https://earth-info.nga.mil/
  baseURL: https://earth-info.nga.mil/
  tags:
  - EOPP
  properties:
  - type: OpenAPI
    url: openapi/national-geospatial-intelligence-agency-eopp-api-openapi.yml
  - type: Documentation
    url: https://earth-info.nga.mil/
  - type: Portal
    url: https://earth-info.nga.mil/
- aid: national-geospatial-intelligence-agency:national-geospatial-intelligence-agency-ephemeris-api
  name: National Geospatial-Intelligence Agency Ephemeris API
  description: GPS ephemeris products, including Center of Mass and Antenna Phase Center variants.
  humanURL: https://earth-info.nga.mil/
  baseURL: https://earth-info.nga.mil/
  tags:
  - Ephemeris
  properties:
  - type: OpenAPI
    url: openapi/national-geospatial-intelligence-agency-ephemeris-api-openapi.yml
  - type: Documentation
    url: https://earth-info.nga.mil/
  - type: Portal
    url: https://earth-info.nga.mil/
- aid: national-geospatial-intelligence-agency:national-geospatial-intelligence-agency-orbit-api
  name: National Geospatial-Intelligence Agency Orbit API
  description: Short-term orbit prediction products.
  humanURL: https://earth-info.nga.mil/
  baseURL: https://earth-info.nga.mil/
  tags:
  - Orbit
  properties:
  - type: OpenAPI
    url: openapi/national-geospatial-intelligence-agency-orbit-api-openapi.yml
  - type: Documentation
    url: https://earth-info.nga.mil/
  - type: Portal
    url: https://earth-info.nga.mil/
common:
- type: Plans
  url: plans/national-geospatial-intelligence-agency-plans-pricing.yml
- type: RateLimits
  url: rate-limits/national-geospatial-intelligence-agency-rate-limits.yml
- type: FinOps
  url: finops/national-geospatial-intelligence-agency-finops.yml
- url: https://www.nga.mil/news/News.html
  type: Blog
- url: https://www.nga.mil/feed.xml
  type: BlogRSS
- type: AgenticAccess
  url: agentic-access/national-geospatial-intelligence-agency-agentic-access.yml
- type: DomainSecurity
  url: security/national-geospatial-intelligence-agency-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/ngageoint
- type: LinkedIn
  url: https://www.linkedin.com/company/nga
- type: Website
  url: https://www.nga.mil/
- type: Portal
  url: https://earth-info.nga.mil/
- type: Tearline
  url: https://www.tearline.mil/
- type: Contact
  url: mailto:geomatics@nga.mil
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

National Geospatial-Intelligence Agency API — frequently asked questions

Does National Geospatial-Intelligence Agency have an API?

Yes. APIs.io lists 4 APIs from National Geospatial-Intelligence Agency, including National Geospatial-Intelligence Agency Clock API, National Geospatial-Intelligence Agency EOPP API and National Geospatial-Intelligence Agency Ephemeris API, and 1 more.

Is there an OpenAPI specification for the National Geospatial-Intelligence Agency API?

Yes. APIs.io indexes 4 OpenAPI specifications for National Geospatial-Intelligence Agency, each linked for download from this page.

How much does the National Geospatial-Intelligence Agency API cost?

APIs.io lists 3 pricing plans for National Geospatial-Intelligence Agency, with each plan's price, limits and inclusions under Pricing on this page.

Is the National Geospatial-Intelligence Agency API ready for AI agents?

National Geospatial-Intelligence Agency has a Kin Score of 25.2 out of 100 (emerging) and an Agent Readiness score of 19.8 (agent-aware), scored by API Evangelist on 2026-11-06.

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