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 API contracts indexed 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 engineering blog, documentation, and 6 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

14.7/100 emerging ▬ flat Agent 14/100 agent aware Front door AI 1/6 silent Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessPaid

1 published contract

Aerospace Launch Services SpaceRocket3D Printing

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 14.7/100 · emerging

Contract Quality 6.8 / 21

Developer Ergonomics 2.0 / 17

Access Clarity 0.7 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.9 / 9

Regulatory Posture 0.0 / 15

Agent readiness — 14/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

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

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 Horizontal (data, software, accessibility, platform) 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 Ask about this →
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
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) Ask about this →
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →

11 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 4.3 — up to +19.1 composite points Ask about this →
Developer Ergonomics scores 11.9 — up to +17.6 composite points Ask about this →
Contract Quality scores 32.1 — up to +17.0 composite points Ask about this →

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.

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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/relativity-space/apis.yml: open an issue on github.com/api-evangelist/relativity-space 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
Space and Satellite (operators, earth observation, ground segment)	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 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

Relativity Space API pricing

Not yet checked against Relativity Space's own pricing page. Compiled by API Evangelist on 2026-06-20 from www.relativityspace.com; confirm before you rely on a figure.

Plan	Price
Launch Services Agreement enterprise	—

Plan details, limits and sources →

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 3

The organization behind the API

Blog

Blog

LinkedIn

Website

Website

Source (apis.yml)

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.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/relativity-space.png
tags:
- Aerospace
- Launch Services
- Space
- Rocket
- 3D Printing
tags_raw:
- Aerospace
- Launch Services
- Space
- Rocket
- 3D Printing
- Additive Manufacturing
created: '2026-06-20'
modified: '2026-10-06'
specificationVersion: '0.23'
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/_original/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
  - Stargate
  tags_raw:
  - 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/_original/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/_original/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:
- url: https://www.relativityspace.com/updates
  type: Blog
- 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

Relativity Space API — frequently asked questions

Does Relativity Space have an API?

Yes. APIs.io lists 3 APIs from Relativity Space, including Relativity Space Terran R Launch, Relativity Space Stargate Manufacturing and Relativity Space Payload and Rideshare.

Is there an OpenAPI specification for the Relativity Space API?

Yes. APIs.io indexes 3 OpenAPI specifications for Relativity Space, each linked for download from this page.

How much does the Relativity Space API cost?

APIs.io lists 1 pricing plan for Relativity Space, with each plan's price, limits and inclusions under Pricing on this page.

Is the Relativity Space API ready for AI agents?

Relativity Space has a Kin Score of 14.7 out of 100 (emerging) and an Agent Readiness score of 13.6 (agent-aware), scored by API Evangelist on 2026-11-13.

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