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

46.9/100 developing ▼ -6.2 Agent 41/100 agent ready Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract 1 MCP Servers

Company Domains SEOExpired

Kin Score

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

Composite quality — 46.9/100 · developing

Contract Quality 14.8 / 21

Developer Ergonomics 4.0 / 17

Access Clarity 10.5 / 17

Operational Transparency 1.7 / 11

Contract Governance 2.2 / 10

Discoverability 5.8 / 9

Regulatory Posture 3.1 / 15

Agent readiness — 41/100 · 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

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):

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
Agent Skills +5 pts — skills artifact present, graded by who authored it
Protected Resource Metadata +5 pts — a served /.well-known/oauth-protected-resource carrying `resource` (documented), and naming its authorization_servers (verified)

2 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 23.8 — up to +15.2 composite points
Operational Transparency scores 15.8 — up to +10.9 composite points
Contract Governance scores 22.0 — up to +9.4 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/catchdoms/apis.yml: open an issue on github.com/api-evangelist/catchdoms 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 →

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.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

OpenAPI

measured — observed by APIs.io (published)

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

CatchDoms Expired Domains API pricing

Prices published by CatchDoms Expired Domains API, read 2026-09-27 from catchdoms.com/pricing.

Plan	Price
Free	0 EUR
Pro Monthly	45 EUR per month
Pro Annual	468 EUR per year
Authority Monthly	89 EUR per month
Authority Annual	960 EUR per year

Plan details, limits and sources →

Billed by: seat · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Catchdoms Plans Pricing

5 plans

PLANS

Catchdoms Price Estimates

0 plans

PLANS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

CatchDoms Expired Domains API

SLA

FinOps 1

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

Catchdoms Finops

FINOPS

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. Counts are the severity each rule declares, not results of running them.

CatchDoms Expired Domains API API Rules

14 rules · 12 error-severity 1 warn-severity 1 info-severity

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 (API Evangelist recommendations) 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
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
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

CatchDoms Expired Domains API — frequently asked questions

Does CatchDoms Expired Domains API have an API?

Yes. APIs.io lists 3 APIs from CatchDoms Expired Domains API, including CatchDoms Expired Domains API Domains API, CatchDoms Expired Domains API Free API and CatchDoms Expired Domains API Pending Delete API.

Is there an OpenAPI specification for the CatchDoms Expired Domains API?

Yes. APIs.io indexes 3 OpenAPI specifications for CatchDoms Expired Domains API, each linked for download from this page.

How do I authenticate with the CatchDoms Expired Domains API?

CatchDoms Expired Domains API uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Catchdoms Authentication.

How much does the CatchDoms Expired Domains API cost?

CatchDoms Expired Domains API publishes its prices; its Free plan is 0 EUR as of 2026-09-27. APIs.io lists 5 pricing plans for CatchDoms Expired Domains API, with each plan's price, limits and inclusions under Pricing on this page.

Does CatchDoms Expired Domains API have an MCP server?

Yes. APIs.io lists 1 MCP server for CatchDoms Expired Domains API: Remote MCP server at catchdoms.com.

Is the CatchDoms Expired Domains API ready for AI agents?

CatchDoms Expired Domains API has a Kin Score of 46.9 out of 100 (developing) and an Agent Readiness score of 40.9 (agent-ready), scored by API Evangelist on 2026-11-06.

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