US Space Command website screenshot

US Space Command

US Space Command (USSPACECOM) is a unified combatant command in the United States Department of Defense responsible for conducting operations in, from, and through space to deter conflict and, if necessary, defeat aggressors. The command provides space situational awareness (SSA) data through Space-Track.org, including the official satellite catalog with orbital element sets, conjunction warnings, and reentry predictions for all tracked objects.

US Space Command publishes 6 APIs on the APIs.io network, including Authentication API, Conjunction Data API, Decay and Reentry API, and 3 more. Tagged areas include Federal-Government, Space, Space Situational Awareness, Satellite Tracking, and Open Data.

The US Space Command catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

US Space Command’s developer surface includes authentication and 3 more developer resources.

📡 Source on GitHub
34.0/100 thin ▬ flat Agent 20/100 agent aware Full breakdown ↓
scored 2026-09-14 · rubric v0.22.0
AccessFreemiumSelf serve⚡ Free to try
1 APIs
Federal-GovernmentSpaceSpace Situational AwarenessSatellite TrackingOpen Data

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-14 · rubric v0.22.0
Composite quality — 34.0/100 · thin
Contract Quality 11.5 / 19
Developer Ergonomics 4.7 / 15
Access Clarity 2.4 / 15
Operational Transparency 0.8 / 10
Contract Governance 1.2 / 9
Discoverability 4.4 / 8
Regulatory Posture 4.7 / 15
Create-or-Update Ergonomics 0.0 / 10
Agent readiness — 20/100 · 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 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
Delegated User Identity 0 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Well-Known Document 0 / 5
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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.
The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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/. 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 github.com/api-evangelist/us-space-comman: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 6

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

US Space Command Authentication API

Session-based authentication

US Space Command Conjunction Data API

Conjunction data messages (collision warnings)

US Space Command Decay and Reentry API

Satellite decay data and tracking impact predictions

US Space Command General Perturbations API

Current orbital element sets for tracked space objects

US Space Command Satellite Catalog API

Satellite catalog metadata

US Space Command Space Object History API

Historical orbital ephemerides

Open Collections 8

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

API Collection

OPEN COLLECTION

Space-Track.org REST Authentication API

OPEN COLLECTION

Space-Track.org REST Authentication Conjunction Data API

OPEN COLLECTION

Space-Track.org REST Authentication Decay and Reentry API

OPEN COLLECTION

Space-Track.org REST Authentication General Perturbations API

OPEN COLLECTION

Space-Track.org REST Authentication Satellite Catalog API

OPEN COLLECTION

Space-Track.org REST Authentication Space Object History API

OPEN COLLECTION

Space-Track.org REST API

OPEN COLLECTION

Scroll for all 8

Pricing Plans 1

Published pricing tiers and plan structures.

Us Space Comman Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Us Space Comman Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Us Space Comman Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Us Space Comman Context

3 classes · 20 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

US Space Command API Rules

5 rules · 4 warnings 1 info

SPECTRAL

US Space Command API Rules

6 rules · 2 errors 2 warnings 2 info

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

USSPACECOM General Perturbations (GP) Orbital Element Set

19 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Us Space Command Gp Structure

0 properties

JSON STRUCTURE

Examples 2

Example request and response payloads for these APIs.

Space Track Conjunction Data Example

2 fields

EXAMPLE

Space Track Query Iss Gp Example

2 fields

EXAMPLE

Security Posture 2

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

Us Space Comman Authentication

apiKey · 1 scheme

SECURITY

Us Space Comman Domain Security

TLSv1.3

SECURITY

Agentic Access 1

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

Us Space Comman Agentic Access

8 operations · 1 acting

8 operations · 1 acting

AGENTIC

Resources

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 1

The organization behind the API

LinkedIn
LinkedIn

Source (apis.yml)

apis.yml Raw ↑ 
aid: us-space-comman
url: https://raw.githubusercontent.com/api-evangelist/us-space-comman/refs/heads/main/apis.yml
common:
- type: AgenticAccess
  url: agentic-access/us-space-comman-agentic-access.yml
- type: DomainSecurity
  url: security/us-space-comman-domain-security.yml
- type: Authentication
  url: authentication/us-space-comman-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/usspacecom
apis:
- aid: us-space-comman:us-space-comman-authentication-api
  name: US Space Command Authentication API
  description: Session-based authentication
  humanURL: https://www.space-track.org/documentation
  tags:
  - Authentication
  properties:
  - type: OpenAPI
    url: openapi/us-space-comman-authentication-api-openapi.yml
  - type: Documentation
    url: https://www.space-track.org/documentation
  - type: Portal
    url: https://www.space-track.org
- aid: us-space-comman:us-space-comman-conjunction-data-api
  name: US Space Command Conjunction Data API
  description: Conjunction data messages (collision warnings)
  humanURL: https://www.space-track.org/documentation
  tags:
  - Conjunction Data
  properties:
  - type: OpenAPI
    url: openapi/us-space-comman-conjunction-data-api-openapi.yml
  - type: Documentation
    url: https://www.space-track.org/documentation
  - type: Portal
    url: https://www.space-track.org
- aid: us-space-comman:us-space-comman-decay-and-reentry-api
  name: US Space Command Decay and Reentry API
  description: Satellite decay data and tracking impact predictions
  humanURL: https://www.space-track.org/documentation
  tags:
  - Decay and Reentry
  properties:
  - type: OpenAPI
    url: openapi/us-space-comman-decay-and-reentry-api-openapi.yml
  - type: Documentation
    url: https://www.space-track.org/documentation
  - type: Portal
    url: https://www.space-track.org
- aid: us-space-comman:us-space-comman-general-perturbations-api
  name: US Space Command General Perturbations API
  description: Current orbital element sets for tracked space objects
  humanURL: https://www.space-track.org/documentation
  tags:
  - General Perturbations
  properties:
  - type: OpenAPI
    url: openapi/us-space-comman-general-perturbations-api-openapi.yml
  - type: Documentation
    url: https://www.space-track.org/documentation
  - type: Portal
    url: https://www.space-track.org
- aid: us-space-comman:us-space-comman-satellite-catalog-api
  name: US Space Command Satellite Catalog API
  description: Satellite catalog metadata
  humanURL: https://www.space-track.org/documentation
  tags:
  - Satellite Catalog
  properties:
  - type: OpenAPI
    url: openapi/us-space-comman-satellite-catalog-api-openapi.yml
  - type: Documentation
    url: https://www.space-track.org/documentation
  - type: Portal
    url: https://www.space-track.org
- aid: us-space-comman:us-space-comman-space-object-history-api
  name: US Space Command Space Object History API
  description: Historical orbital ephemerides
  humanURL: https://www.space-track.org/documentation
  tags:
  - Space Object History
  properties:
  - type: OpenAPI
    url: openapi/us-space-comman-space-object-history-api-openapi.yml
  - type: Documentation
    url: https://www.space-track.org/documentation
  - type: Portal
    url: https://www.space-track.org
name: US Space Command
tags:
- Federal-Government
- Space
- Space Situational Awareness
- Satellite Tracking
- Open Data
tags_raw:
- Federal Government
- Space
- Space Situational Awareness
- Satellite Tracking
- Open Data
kind: contract
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: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/us-space-comman.png
access: 3rd-Party
created: '2024-12-03'
modified: '2026-05-19'
position: Consuming
description: US Space Command (USSPACECOM) is a unified combatant command in the United States Department of Defense responsible
  for conducting operations in, from, and through space to deter conflict and, if necessary, defeat aggressors. The command
  provides space situational awareness (SSA) data through Space-Track.org, including the official satellite catalog with orbital
  element sets, conjunction warnings, and reentry predictions for all tracked objects.
features:
- Orbital Element Sets (GP / TLE)
- Satellite Catalog (SATCAT)
- Conjunction Data Messages (CDM)
- Tracking and Impact Prediction (TIP)
- Historical Orbital Ephemerides
- Space Object Decay Data
useCases:
- Satellite operations and collision avoidance
- Space debris monitoring
- Orbital mechanics research
- Satellite tracking and identification
- Space traffic management
- Launch planning and collision risk assessment
integrations:
- TraCSS (Traffic Coordination System for Space)
solutions:
- Space Situational Awareness
- Space Traffic Management
- Orbital Debris Research
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
specificationVersion: '0.23'

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