CatchDoms Expired Domains API

CatchDoms provides an API to discover expired and expiring domain names across multiple registrars such as Dynadot, GoDaddy, Catched, and DropCatch. Users can filter results by domain age, backlink count, domain authority, and other SEO metrics. The service also assigns a quality score to help identify hidden gem domains for resale or branding. Documentation includes endpoints for searching, retrieving domain details, and accessing historical data, supporting JSON responses and pagination. The platform aims to empower marketers, investors, and developers to capitalize on the secondary domain market efficiently.

CatchDoms Expired Domains API publishes 3 API contracts indexed on the APIs.io network: Domains API, Free API, and Pending Delete API. Tagged areas include Company, Domains, SEO, and Expired.

The CatchDoms Expired Domains API catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

CatchDoms Expired Domains API’s developer surface includes changelog, support, signup flow, authentication, documentation, API reference, pricing, and 21 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

51.6/100 developing ▬ flat Agent 37/100 agent ready Full breakdown ↓
scored 2026-10-17 · rubric v0.24.0

2 published contracts 1 MCP Servers

Company Domains SEOExpired

Kin Score

Kin Score How this is scored →
scored 2026-10-17 · rubric v0.24.0

Composite quality — 51.6/100 · developing

Contract Quality 13.6 / 21

Developer Ergonomics 6.1 / 17

Access Clarity 13.0 / 17

Operational Transparency 1.7 / 11

Contract Governance 2.2 / 10

Discoverability 6.0 / 9

Regulatory Posture 3.7 / 15

Agent readiness — 37/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 4 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 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 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/.

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/catchdoms: 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 3

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

CatchDoms Expired Domains API Domains API

The Domains API from CatchDoms Expired Domains API — 2 operation(s) for domains.

CatchDoms Expired Domains API Free API

The Free API from CatchDoms Expired Domains API — 1 operation(s) for free.

CatchDoms Expired Domains API Pending Delete API

The Pending-Delete API from CatchDoms Expired Domains API — 2 operation(s) for pending-delete.

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

CatchDoms Expired Domains API MCP Server

Remote MCP server at catchdoms.com.

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Catchdoms Plans Pricing

5 plans

PLANS

Semantic Vocabularies 1

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

Catchdoms Context

5 classes · 74 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

CatchDoms Expired Domains API API Rules

14 rules · 12 errors 1 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.

Catchdoms Openapi Overlay

0 actions · update

DERIVED

JSON Schema 5

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

Domain

57 properties

JSON SCHEMA

FreeDomain

16 properties

JSON SCHEMA

PaginationLinks

4 properties

JSON SCHEMA

PaginationMeta

6 properties

JSON SCHEMA

PendingDeleteDomain

23 properties

JSON SCHEMA

Security Posture 2

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

Catchdoms Authentication

http · 1 scheme

SECURITY

Catchdoms Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Catchdoms Agentic Access

5 operations

5 operations · 0 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

LLMsTxt

MCPServer

WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

Support

Support

Commercial 4

Pricing, plans, and the legal terms of use

Plans

PrivacyPolicy

Pricing

TermsOfService

Company 3

The organization behind the API

Newsroom

Newsroom

Website

Website

Blog

Blog

Other 4

Properties that don't map to a standard resource type

Overlay

Hosts

Vendors

Leadership

Source (apis.yml)

aid: catchdoms
name: CatchDoms Expired Domains API
image: https://catchdoms.com/images/og.jpg
description: CatchDoms provides an API to discover expired and expiring domain names across multiple registrars such as Dynadot,
  GoDaddy, Catched, and DropCatch. Users can filter results by domain age, backlink count, domain authority, and other SEO
  metrics. The service also assigns a quality score to help identify hidden gem domains for resale or branding. Documentation
  includes endpoints for searching, retrieving domain details, and accessing historical data, supporting JSON responses and
  pagination. The platform aims to empower marketers, investors, and developers to capitalize on the secondary domain market
  efficiently.
url: https://raw.githubusercontent.com/api-evangelist/catchdoms/refs/heads/main/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-09-27 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-09-27'
modified: '2026-09-27'
tags:
- Company
- Domains
- SEO
- Expired
tags_raw:
- Company
- API
- Domains
- SEO
- Expired
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/catchdoms-agentic-access.yml
- type: Plans
  url: plans/catchdoms-plans-pricing.yml
- type: Spectral
  url: rules/catchdoms-rules.yml
- type: JSONLD
  url: json-ld/catchdoms-context.jsonld
- type: Vocabulary
  url: vocabulary/catchdoms-vocabulary.yml
- type: DataModel
  url: data-model/catchdoms-data-model.yml
- type: ChangeLog
  url: changelog/catchdoms-changelog.yml
- type: ErrorCatalog
  url: errors/catchdoms-problem-types.yml
- type: Conformance
  url: conformance/catchdoms-conformance.yml
- type: Overlay
  url: overlays/catchdoms-openapi-overlay.yml
- type: LLMsTxt
  url: llms/catchdoms-llms.txt
- type: MCPServer
  url: mcp/catchdoms-mcp.yml
- type: WellKnown
  url: well-known/catchdoms-well-known.yml
- type: Hosts
  url: hosts/catchdoms-hosts.yml
- type: Vendors
  url: vendors/catchdoms-vendors.yml
- type: Support
  url: https://catchdoms.com/tlds/help
- type: SignUp
  url: https://catchdoms.com/register
- type: PrivacyPolicy
  url: https://catchdoms.com/privacy
- type: Newsroom
  url: https://catchdoms.com/tlds/news
- type: Leadership
  url: https://catchdoms.com/tlds/team
- type: Authentication
  url: authentication/catchdoms-authentication.yml
- type: DomainSecurity
  url: security/catchdoms-domain-security.yml
- type: Website
  url: https://catchdoms.com/
- type: Documentation
  url: https://catchdoms.com/docs
- type: APIReference
  url: https://catchdoms.com/api
- type: Pricing
  url: https://catchdoms.com/pricing
- type: TermsOfService
  url: https://catchdoms.com/terms
- type: Blog
  url: https://catchdoms.com/blog
apis:
- aid: catchdoms:catchdoms-domains-api
  name: CatchDoms Expired Domains API Domains API
  description: The Domains API from CatchDoms Expired Domains API — 2 operation(s) for domains.
  humanURL: https://catchdoms.com/docs
  baseURL: https://catchdoms.com/api
  tags:
  - Domains
  properties:
  - type: OpenAPI
    url: openapi/catchdoms-domains-api-openapi.yml
  - type: JSONSchema
    url: json-schema/catchdoms-domain-schema.json
  - type: JSONSchema
    url: json-schema/catchdoms-pending-delete-domain-schema.json
  - type: JSONSchema
    url: json-schema/catchdoms-free-domain-schema.json
  - type: JSONSchema
    url: json-schema/catchdoms-pagination-meta-schema.json
  - type: JSONSchema
    url: json-schema/catchdoms-pagination-links-schema.json
- aid: catchdoms:catchdoms-free-api
  name: CatchDoms Expired Domains API Free API
  description: The Free API from CatchDoms Expired Domains API — 1 operation(s) for free.
  humanURL: https://catchdoms.com/docs
  baseURL: https://catchdoms.com/api
  tags:
  - Free
  properties:
  - type: OpenAPI
    url: openapi/catchdoms-free-api-openapi.yml
  - type: JSONSchema
    url: json-schema/catchdoms-domain-schema.json
  - type: JSONSchema
    url: json-schema/catchdoms-pending-delete-domain-schema.json
  - type: JSONSchema
    url: json-schema/catchdoms-free-domain-schema.json
  - type: JSONSchema
    url: json-schema/catchdoms-pagination-meta-schema.json
  - type: JSONSchema
    url: json-schema/catchdoms-pagination-links-schema.json
- aid: catchdoms:catchdoms-pending-delete-api
  name: CatchDoms Expired Domains API Pending Delete API
  description: The Pending-Delete API from CatchDoms Expired Domains API — 2 operation(s) for pending-delete.
  humanURL: https://catchdoms.com/docs
  baseURL: https://catchdoms.com/api
  tags:
  - Pending-Delete
  properties:
  - type: OpenAPI
    url: openapi/catchdoms-pending-delete-api-openapi.yml
  - type: JSONSchema
    url: json-schema/catchdoms-domain-schema.json
  - type: JSONSchema
    url: json-schema/catchdoms-pending-delete-domain-schema.json
  - type: JSONSchema
    url: json-schema/catchdoms-free-domain-schema.json
  - type: JSONSchema
    url: json-schema/catchdoms-pagination-meta-schema.json
  - type: JSONSchema
    url: json-schema/catchdoms-pagination-links-schema.json
x-enrichment:
  date: '2026-09-27'
  status: enriched
  artifacts_added: 22
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

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