Relativity Space website screenshot

Relativity Space

Relativity Space is an aerospace manufacturer building Terran R, a reusable medium-to-heavy lift orbital launch vehicle produced with the company's proprietary Stargate metal 3D printing platform in Long Beach, CA. The company sells launch services - dedicated and rideshare payload missions to LEO and GTO - to government, commercial, and telecommunications customers. Relativity Space does not publish a public developer API; its developer-facing artifact is the Terran payload user's guide (mission integration documentation), not a programmatic interface.

Relativity Space publishes 3 APIs on the APIs.io network: Terran R Launch, Stargate Manufacturing, and Payload and Rideshare. Tagged areas include Aerospace, Launch Services, Space, Rocket, and 3D Printing.

Relativity Space’s developer surface includes documentation and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub
22.1/100 emerging ▬ flat Agent 19/100 agent aware Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessPaid
3 APIs
AerospaceLaunch ServicesSpaceRocket3D PrintingAdditive Manufacturing

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 22.1/100 · emerging
Contract Quality 8.1 / 25
Developer Ergonomics 1.7 / 20
Commercial Clarity 5.8 / 20
Operational Transparency 0.0 / 13
Governance 0.0 / 12
Discoverability 6.5 / 10
Agent readiness — 19/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 0 / 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
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/relativity-space: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 3

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

Relativity Space Terran R Launch

Terran R is a reusable medium-to-heavy lift launch vehicle offering up to 23,500 kg to LEO (downrange landing) and 5,500 kg to GTO, with a planned first launch from Launch Compl...

Relativity Space Stargate Manufacturing

Stargate is Relativity Space's proprietary fourth-generation metal 3D printing platform used to manufacture Terran R structures at its Long Beach headquarters. This is an intern...

Relativity Space Payload and Rideshare

Payload integration for dedicated constellation deployments, single large satellites, and multi-customer rideshare missions, supported through a standard Payload Attach Fitting ...

Open Collections 1

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

Relativity Space API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Relativity Space Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Relativity Space Rate Limits

0 limits

RATE LIMITS

FinOps 1

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

Relativity Space Finops

FINOPS

Security Posture 1

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

Relativity Space Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

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

LinkedIn
LinkedIn
 Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: relativity-space
url: https://raw.githubusercontent.com/api-evangelist/relativity-space/refs/heads/main/apis.yml
name: Relativity Space
kind: company
description: Relativity Space is an aerospace manufacturer building Terran R, a reusable medium-to-heavy lift orbital launch
  vehicle produced with the company's proprietary Stargate metal 3D printing platform in Long Beach, CA. The company sells
  launch services - dedicated and rideshare payload missions to LEO and GTO - to government, commercial, and telecommunications
  customers. Relativity Space does not publish a public developer API; its developer-facing artifact is the Terran payload
  user's guide (mission integration documentation), not a programmatic interface.
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/relativity-space.png
tags:
- Aerospace
- Launch Services
- Space
- Rocket
- 3D Printing
- Additive Manufacturing
created: '2026-06-20'
modified: '2026-06-20'
specificationVersion: '0.19'
apis:
- aid: relativity-space:terran-r-launch
  name: Relativity Space Terran R Launch
  tags:
  - Launch Services
  - Terran R
  - Orbital Launch
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.relativityspace.com/terran-r
  properties:
  - url: https://www.relativityspace.com/terran-r
    type: Documentation
  - url: openapi/relativity-space-openapi.yml
    type: OpenAPI
  description: Terran R is a reusable medium-to-heavy lift launch vehicle offering up to 23,500 kg to LEO (downrange landing)
    and 5,500 kg to GTO, with a planned first launch from Launch Complex 16 at Cape Canaveral. This is a launch-services product
    surface, not a programmatic API - there is no public developer API. Informational entry only.
- aid: relativity-space:stargate-manufacturing
  name: Relativity Space Stargate Manufacturing
  tags:
  - 3D Printing
  - Additive Manufacturing
  - Stargate
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.relativityspace.com
  properties:
  - url: https://www.relativityspace.com
    type: Documentation
  - url: openapi/relativity-space-openapi.yml
    type: OpenAPI
  description: Stargate is Relativity Space's proprietary fourth-generation metal 3D printing platform used to manufacture
    Terran R structures at its Long Beach headquarters. This is an internal manufacturing technology, not an externally consumable
    API - no public developer API or machine-to-machine interface is documented. Informational entry only.
- aid: relativity-space:payload-rideshare
  name: Relativity Space Payload and Rideshare
  tags:
  - Payload
  - Rideshare
  - Mission Integration
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.relativityspace.com/terran-r
  properties:
  - url: https://www.relativityspace.com/terran-r
    type: Documentation
  - url: openapi/relativity-space-openapi.yml
    type: OpenAPI
  description: Payload integration for dedicated constellation deployments, single large satellites, and multi-customer rideshare
    missions, supported through a standard Payload Attach Fitting (PAF) interface and documented in a payload user's guide.
    Mission integration is handled via sales and engineering contact, not a public API. Informational entry only.
common:
- type: DomainSecurity
  url: security/relativity-space-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/relativity-space
- type: Website
  url: https://www.relativityspace.com
- type: Documentation
  url: https://www.relativityspace.com/terran-r
- type: Plans
  url: plans/relativity-space-plans-pricing.yml
- type: RateLimits
  url: rate-limits/relativity-space-rate-limits.yml
- type: FinOps
  url: finops/relativity-space-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com