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 APIs 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.

National Geospatial-Intelligence Agency’s developer surface includes developer portal and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub

34.5/100 thin ▬ flat Agent 22/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6

AccessFreemium

4 APIs

Federal GovernmentGeospatialIntelligenceDefenseGeomatics

Kin Score

Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6

Composite quality — 34.5/100 · thin

Contract Quality 12.7 / 25

Developer Ergonomics 1.7 / 20

Commercial Clarity 7.9 / 20

Operational Transparency 4.8 / 13

Governance 0.0 / 12

Discoverability 7.4 / 10

Agent readiness — 22/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 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 0 / 4

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APIs 4

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

Rate Limits 1

Documented rate limits and quota policies.

National Geospatial Intelligence Agency Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

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 1

Status, limits, changes, and where to get help

Contact

Contact

Company 2

The organization behind the API

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
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  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: '2026-05-19'
specificationVersion: '0.19'
tags:
- Federal Government
- Geospatial
- Intelligence
- Defense
- Geomatics
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: 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

Kin Score

APIs 4

National Geospatial-Intelligence Agency Clock API

National Geospatial-Intelligence Agency EOPP API

National Geospatial-Intelligence Agency Ephemeris API

National Geospatial-Intelligence Agency Orbit API

Open Collections 1

NGA Earth-Info REST API

Pricing Plans 1

National Geospatial Intelligence Agency Plans Pricing