Spaceship

Spaceship is a domain registrar and domain marketplace offering domain registration, DNS management, WHOIS privacy protection, and a SellerHub resale marketplace with SafePay escrow. Its public REST API (https://spaceship.dev/api, v1) exposes 40 operations across domain management, availability, settings, transfers, personal nameservers, contacts, DNS records, SellerHub, and asynchronous operations. Authentication uses a paired API key and secret (X-API-Key / X-API-Secret) with per-key scopes; long-running actions use an async-operation polling model (202 + a spaceship-async-operationid header polled at /v1/async-operations/{operationId}).

Spaceship publishes 10 API contracts indexed on the APIs.io network, including Async Operations API, Contacts API, Contacts attributes API, and 7 more. Tagged areas include Company, Domains, Domain Registrar, DNS, and Domain Marketplace.

The Spaceship catalog on APIs.io includes 1 Spectral governance ruleset.

Spaceship’s developer surface includes engineering blog, documentation, API reference, getting-started guide, support, authentication, and 17 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

35.1/100 thin ▬ flat Agent 35/100 agent ready Heartbeat 100/100 alive Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 published contract 4 Agent Skills

Company Domains Domain Registrar DNSDomain MarketplaceNameserversWHOIS Developer Tools

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 35.1/100 · thin

Contract Quality 9.7 / 19

Developer Ergonomics 8.8 / 15

Access Clarity 0.0 / 15

Operational Transparency 0.3 / 10

Contract Governance 1.6 / 9

Discoverability 5.5 / 8

Regulatory Posture 4.0 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 35/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 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 Education & Research 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/.

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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
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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks

5 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 0.0 — up to +20.0 composite points
Operational Transparency scores 2.6 — up to +12.7 composite points
Contract Quality scores 51.9 — up to +12.0 composite points

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.

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/spaceship/apis.yml: open an issue on github.com/api-evangelist/spaceship 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
Domains and DNS (registrars, registries, DNS)	regulated	36.4 (thin)	-	1
Stripe App Marketplace and Partner Ecosystem (builders on Stripe)	regulated	36.4 (thin)	-	1

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 2

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.

DNS

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

OpenAPI

measured — observed by APIs.io (published)

APIs 10

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

Spaceship Async Operations API

The Async Operations API from Spaceship — 1 operation(s) for async operations.

Spaceship Contacts API

The Contacts API from Spaceship — 2 operation(s) for contacts.

Spaceship Contacts attributes API

The Contacts attributes API from Spaceship — 2 operation(s) for contacts attributes.

Spaceship DNS records API

The DNS records API from Spaceship — 1 operation(s) for dns records.

Spaceship Domain Availability API

The Domain Availability API from Spaceship — 2 operation(s) for domain availability.

Spaceship Domain Management API

The Domain Management API from Spaceship — 4 operation(s) for domain management.

Spaceship Domain Settings API

The Domain Settings API from Spaceship — 5 operation(s) for domain settings.

Spaceship Domain Transfer API

The Domain Transfer API from Spaceship — 3 operation(s) for domain transfer.

Spaceship Personal Nameservers API

The Personal Nameservers API from Spaceship — 2 operation(s) for personal nameservers.

Spaceship SellerHub API

The SellerHub API from Spaceship — 7 operation(s) for sellerhub.

Scroll for all 10

Open Collections 10

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

Spaceship.com Async Operations API

OPEN COLLECTION

Spaceship.com Async Operations Contacts API

OPEN COLLECTION

Spaceship.com Async Operations Contacts attributes API

OPEN COLLECTION

Spaceship.com Async Operations DNS records API

OPEN COLLECTION

Spaceship.com Async Operations Domain Availability API

OPEN COLLECTION

Spaceship.com Async Operations Domain Management API

OPEN COLLECTION

Spaceship.com Async Operations Domain Settings API

OPEN COLLECTION

Spaceship.com Async Operations Domain Transfer API

OPEN COLLECTION

Spaceship.com Async Operations Personal Nameservers API

OPEN COLLECTION

Spaceship.com Async Operations SellerHub API

OPEN COLLECTION

Scroll for all 10

Agent Skills 4

Packaged agent skills for driving this provider's APIs from an AI assistant.

Manage DNS records for a domain

AGENT SKILL

Register a domain

AGENT SKILL

List and sell a domain on SellerHub

AGENT SKILL

Transfer a domain in

AGENT SKILL

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Spaceship API Rules

71 rules · 60 errors 10 warnings 1 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Spaceship Openapi Overlay

2 actions · update · spaceship-openapi-original.json

DERIVED

Security Posture 2

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

Spaceship Authentication

apiKey · 2 schemes

SECURITY

Spaceship Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Spaceship Scopes

11 scopes

SCOPES

Agentic Access 1

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

Spaceship Agentic Access

40 operations · 23 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

LLMsTxt

WellKnown

AgentSkill

AgenticAccess

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

DataModel

Conformance

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

Access & Security 3

Authentication, authorization, and security posture

Authentication

Authentication

OAuthScopes

OAuthScopes

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: spaceship
name: Spaceship
description: Spaceship is a domain registrar and domain marketplace offering domain registration, DNS management, WHOIS privacy
  protection, and a SellerHub resale marketplace with SafePay escrow. Its public REST API (https://spaceship.dev/api, v1)
  exposes 40 operations across domain management, availability, settings, transfers, personal nameservers, contacts, DNS records,
  SellerHub, and asynchronous operations. Authentication uses a paired API key and secret (X-API-Key / X-API-Secret) with
  per-key scopes; long-running actions use an async-operation polling model (202 + a spaceship-async-operationid header polled
  at /v1/async-operations/{operationId}).
url: https://raw.githubusercontent.com/api-evangelist/spaceship/refs/heads/main/apis.yml
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: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - scopes
  - security
  generated: '2026-11-06'
  method: derived
image: https://spaceship-cdn.com/spaceship-api-doc-assets/logo.svg
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
x-docs-platform: redocly
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-04
tags:
- Company
- Domains
- Domain Registrar
- DNS
- Domain Marketplace
- Nameservers
- WHOIS
- Developer Tools
tags_raw:
- Company
- Domains
- Domain Registrar
- DNS
- Domain Marketplace
- Nameservers
- WHOIS
- Developer Tools
- API
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: spaceship:spaceship-async-operations-api
  name: Spaceship Async Operations API
  description: The Async Operations API from Spaceship — 1 operation(s) for async operations.
  humanURL: https://docs.spaceship.dev/
  baseURL: https://spaceship.dev/api
  tags:
  - Async Operations
  properties:
  - type: OpenAPI
    url: openapi/spaceship-async-operations-api-openapi.yml
  - type: Documentation
    url: https://docs.spaceship.dev/
  - type: APIReference
    url: https://docs.spaceship.dev/
- aid: spaceship:spaceship-contacts-api
  name: Spaceship Contacts API
  description: The Contacts API from Spaceship — 2 operation(s) for contacts.
  humanURL: https://docs.spaceship.dev/
  baseURL: https://spaceship.dev/api
  tags:
  - Contacts
  properties:
  - type: OpenAPI
    url: openapi/spaceship-contacts-api-openapi.yml
  - type: Documentation
    url: https://docs.spaceship.dev/
  - type: APIReference
    url: https://docs.spaceship.dev/
- aid: spaceship:spaceship-contacts-attributes-api
  name: Spaceship Contacts attributes API
  description: The Contacts attributes API from Spaceship — 2 operation(s) for contacts attributes.
  humanURL: https://docs.spaceship.dev/
  baseURL: https://spaceship.dev/api
  tags:
  - Contacts attributes
  properties:
  - type: OpenAPI
    url: openapi/spaceship-contacts-attributes-api-openapi.yml
  - type: Documentation
    url: https://docs.spaceship.dev/
  - type: APIReference
    url: https://docs.spaceship.dev/
- aid: spaceship:spaceship-dns-records-api
  name: Spaceship DNS records API
  description: The DNS records API from Spaceship — 1 operation(s) for dns records.
  humanURL: https://docs.spaceship.dev/
  baseURL: https://spaceship.dev/api
  tags:
  - DNS Records
  tags_raw:
  - DNS records
  properties:
  - type: OpenAPI
    url: openapi/spaceship-dns-records-api-openapi.yml
  - type: Documentation
    url: https://docs.spaceship.dev/
  - type: APIReference
    url: https://docs.spaceship.dev/
- aid: spaceship:spaceship-domain-availability-api
  name: Spaceship Domain Availability API
  description: The Domain Availability API from Spaceship — 2 operation(s) for domain availability.
  humanURL: https://docs.spaceship.dev/
  baseURL: https://spaceship.dev/api
  tags:
  - Domain Availability
  properties:
  - type: OpenAPI
    url: openapi/spaceship-domain-availability-api-openapi.yml
  - type: Documentation
    url: https://docs.spaceship.dev/
  - type: APIReference
    url: https://docs.spaceship.dev/
- aid: spaceship:spaceship-domain-management-api
  name: Spaceship Domain Management API
  description: The Domain Management API from Spaceship — 4 operation(s) for domain management.
  humanURL: https://docs.spaceship.dev/
  baseURL: https://spaceship.dev/api
  tags:
  - Domain Management
  properties:
  - type: OpenAPI
    url: openapi/spaceship-domain-management-api-openapi.yml
  - type: Documentation
    url: https://docs.spaceship.dev/
  - type: APIReference
    url: https://docs.spaceship.dev/
- aid: spaceship:spaceship-domain-settings-api
  name: Spaceship Domain Settings API
  description: The Domain Settings API from Spaceship — 5 operation(s) for domain settings.
  humanURL: https://docs.spaceship.dev/
  baseURL: https://spaceship.dev/api
  tags:
  - Domain Settings
  properties:
  - type: OpenAPI
    url: openapi/spaceship-domain-settings-api-openapi.yml
  - type: Documentation
    url: https://docs.spaceship.dev/
  - type: APIReference
    url: https://docs.spaceship.dev/
- aid: spaceship:spaceship-domain-transfer-api
  name: Spaceship Domain Transfer API
  description: The Domain Transfer API from Spaceship — 3 operation(s) for domain transfer.
  humanURL: https://docs.spaceship.dev/
  baseURL: https://spaceship.dev/api
  tags:
  - Domain Transfer
  properties:
  - type: OpenAPI
    url: openapi/spaceship-domain-transfer-api-openapi.yml
  - type: Documentation
    url: https://docs.spaceship.dev/
  - type: APIReference
    url: https://docs.spaceship.dev/
- aid: spaceship:spaceship-personal-nameservers-api
  name: Spaceship Personal Nameservers API
  description: The Personal Nameservers API from Spaceship — 2 operation(s) for personal nameservers.
  humanURL: https://docs.spaceship.dev/
  baseURL: https://spaceship.dev/api
  tags:
  - Personal Nameservers
  properties:
  - type: OpenAPI
    url: openapi/spaceship-personal-nameservers-api-openapi.yml
  - type: Documentation
    url: https://docs.spaceship.dev/
  - type: APIReference
    url: https://docs.spaceship.dev/
- aid: spaceship:spaceship-sellerhub-api
  name: Spaceship SellerHub API
  description: The SellerHub API from Spaceship — 7 operation(s) for sellerhub.
  humanURL: https://docs.spaceship.dev/
  baseURL: https://spaceship.dev/api
  tags:
  - SellerHub
  properties:
  - type: OpenAPI
    url: openapi/spaceship-sellerhub-api-openapi.yml
  - type: Documentation
    url: https://docs.spaceship.dev/
  - type: APIReference
    url: https://docs.spaceship.dev/
common:
- url: https://www.spaceship.com/blog/
  type: Blog
- type: Website
  url: https://www.spaceship.com/
- type: DeveloperPortal
  url: https://www.spaceship.com/application/api-manager/
- type: Documentation
  url: https://docs.spaceship.dev/
- type: APIReference
  url: https://docs.spaceship.dev/
- type: GettingStarted
  url: https://docs.spaceship.dev/
- type: Support
  url: https://www.spaceship.com/about/contact-us/
- type: GitHubOrganization
  url: https://github.com/spaceshipapp
- type: Authentication
  url: authentication/spaceship-authentication.yml
- type: OAuthScopes
  url: scopes/spaceship-scopes.yml
- type: Conventions
  url: conventions/spaceship-conventions.yml
- type: ErrorCatalog
  url: errors/spaceship-problem-types.yml
- type: Lifecycle
  url: lifecycle/spaceship-lifecycle.yml
- type: DataModel
  url: data-model/spaceship-data-model.yml
- type: Conformance
  url: conformance/spaceship-conformance.yml
- type: X-MCPServerCandidate
  url: mcp/spaceship-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: LLMsTxt
  url: llms/spaceship-llms.txt
- type: Overlay
  url: overlays/spaceship-openapi-overlay.yaml
- type: WellKnown
  url: well-known/spaceship-well-known.yml
- type: Packages
  url: packages/spaceship-packages.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DomainSecurity
  url: security/spaceship-domain-security.yml
- type: AgenticAccess
  url: agentic-access/spaceship-agentic-access.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 18
  pass: local-v1

Spaceship API — frequently asked questions

Does Spaceship have an API?

Yes. APIs.io lists 10 APIs from Spaceship, including Spaceship Async Operations API, Spaceship Contacts API and Spaceship Contacts attributes API, and 7 more.

Is there an OpenAPI specification for the Spaceship API?

Yes. APIs.io indexes 10 OpenAPI specifications for Spaceship, each linked for download from this page.

How do I authenticate with the Spaceship API?

Spaceship uses bearer-token authentication (apiKey · 2 schemes). The details are profiled on APIs.io as Spaceship Authentication.

Is the Spaceship API ready for AI agents?

Spaceship has a Kin Score of 35.1 out of 100 (thin) and an Agent Readiness score of 35.1 (agent-ready), scored by API Evangelist on 2026-11-06.

Work with this as data

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get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

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