# Space-Track

**Canonical:** https://apis.io/providers/spacetrack/  
**Website:** https://www.space-track.org  
**APIs profiled:** 7

US military space surveillance REST API providing Two-Line Element (TLE) sets, conjunction data messages, orbital element sets, satellite catalog data, and decay predictions for tracked satellites and debris operated by the 18th Space Control Squadron.

## Kin Score — 41.3 / 100 (developing)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 41.3).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 69.0 |
| Governance | 9.8 |
| Contract Governance | 9.8 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 31.0 |
| Commercial Clarity | 46.1 |
| Access Clarity | 46.1 |

## Agent readiness — 22.3 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | partial |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Free · Self-serve signup — onboarding: self-serve, pricing: free, trial: no (confidence: high).

## APIs (7)

- **Space-Track Ancillary API** — Launch sites, boxscore, announcements, and other reference data
- **Space-Track Authentication API** — Session-based authentication via cookie
- **Space-Track Conjunction Data API** — Spaceflight safety conjunction data messages (CDM)
- **Space-Track Decay Predictions API** — Satellite reentry and decay predictions
- **Space-Track General Perturbations API** — Current and historical SGP4 keplerian element sets (TLE/OMM)
- **Space-Track Satellite Catalog API** — Catalog metadata for all tracked Earth-orbiting objects
- **Space-Track Tracking and Impact Prediction API** — Reentry tracking and impact prediction messages (TIP)

## Agentic access (1)

- **Spacetrack Agentic Access** — 22 operations · 1 acting

## Security (2)

- **Spacetrack Authentication** — apiKey · 1 scheme
- **Spacetrack Domain Security** — TLSv1.3

## Plans (1)

- **Plans**

## Tags

Space, Satellites, TLE, Orbital Data, Space Surveillance, Debris Tracking, Conjunction Data, US Military

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/spacetrack/). Scores are computed from the provider's own public artifacts under a published rubric.