CatchDoms — Expired Domains API & MCP Server
CatchDoms exposes an Expired Domains API and an MCP (Model Context Protocol) server that aggregate expired domains from 16 auction platforms (Dynadot, GoDaddy, DropCatch, SnapNames, Catched, Gname, BloomUp, UKBackorder, DomainLore, and 7 more) plus 100,000+ aged ccTLD domains available at registration price. Every domain is enriched with Trust Flow, Citation Flow, Domain Authority, backlinks count, referring domains, and Wayback history.
Use the REST API to integrate expired domain data into your tools, scripts, or pipelines. Use the MCP server to let Claude, Cursor, Windsurf, or any MCP-compatible AI assistant search expired domains conversationally — find drop-catches, check auction prices, and surface high-value aged domains programmatically.
Quick Start (Free — no API key needed)
Try it instantly — no signup required:
{
"mcpServers": {
"catchdoms": {
"url": "https://catchdoms.com/mcp/catchdoms/free",
"transport": "sse"
}
}
}
Free tier includes: Top 50 domains per search, first 10 names visible, basic SEO metrics. Trust Flow, Citation Flow, and GMB detection require Pro.
Pro (full access)
{
"mcpServers": {
"catchdoms": {
"url": "https://catchdoms.com/mcp/catchdoms",
"transport": "sse",
"headers": {
"Authorization": "Bearer YOUR_API_KEY"
}
}
}
}
Get your API key: Sign up for free → API Settings → See pricing
| Feature | Free | Pro | Authority |
|---|
| Domains per search | 50 | Unlimited | Unlimited |
| Visible domain names | 10 | All | All |
| Trust Flow / Citation Flow | Hidden | Yes | Yes |
| GMB detection | Hidden | Yes | Yes |
get_domain tool | No | Yes | Yes |
| Aged domains (regfee, 100k+) | No | No | Yes |
| Rate limit | 3 req/min | 15 req/min | 60 req/min |
search_domains
Search for domains with filters. Returns up to 100 results sorted by quality.
Parameters:
| Parameter | Type | Description |
|---|
source | string | Filter by platform: dynadot, catched, dropcatch, godaddy, gname, snapnames, ukdroplists, subreg, webexpire, parkio, bloomup, seodomains, nameshift, nicsell, gnews-domains, backorders-domains, regfree (Authority only) |
tld | string | Filter by TLD (.com, .fr, .de). Comma-separated for multiple. |
score_min | integer | Minimum quality score (0-100). 50+ = good, 70+ = excellent. |
age_min | integer | Minimum domain age in years (Wayback first snapshot). |
language | string | Detected language code (EN, FR, DE, ES, etc.). |
contains | string | Keyword the domain name must contain. |
has_bids | boolean | Only domains with active auction bids. |
has_backlinks | boolean | Only domains with referring domains. |
has_gmb | boolean | Only domains with a Google Business listing. |
has_edu_gov | boolean | Only domains with .edu or .gov backlinks. |
da_min | integer | Minimum Domain Authority (0-100). |
rd_min | integer | Minimum referring domains count. |
tf_min | integer | Minimum Trust Flow (0-100). |
cf_min | integer | Minimum Citation Flow (0-100). |
categories | string | TTF topic categories, comma-separated (e.g., Business,Health). |
price_min | number | Minimum price/bid (USD). |
price_max | number | Maximum price/bid (USD). |
snapshots_min | integer | Minimum Wayback Machine snapshots. |
limit | integer | Results to return (1-100, default 50). |
Example prompt:
Find me French .fr domains with a quality score above 50, at least 10 years old, under $500
get_domain
Get full details for a specific domain.
| Parameter | Type | Description |
|---|
domain_id | integer | Domain ID |
domain_name | string | Domain name (e.g., example.com) |
list_filters
Get available filter options with counts — sources, TLDs, and languages.
No parameters.
get_stats
Get platform statistics — total domains, new today, by source, SEO coverage.
No parameters.
Domain Sources
16 auction & marketplace sources, refreshed daily:
| Source | Type |
|---|
| Dynadot | Closeouts (fixed $5-$30) + auctions |
| GoDaddy | Expiring auctions + closeouts |
| DropCatch | Auctions (Dropped, Pre-Release) |
| Catched | Auctions + backorder |
| Gname | Auctions + buy now |
| SnapNames | Pre-release + closeout |
| UK Backorder | UK dropping/expired |
| Subreg | Expiring auctions |
| WebExpire | French .fr auctions |
| Park.io | Premium auctions |
| BloomUp | French .fr auctions + buy now |
| SEO.Domains | Buy now with SEO metrics |
| NameShift | Premium buy-now / make offer |
| Nicsell | European ccTLD auctions (top-auktionen) |
| Gnews Domains | Hand-curated premium news domains, buy-now |
| Backorders Domains | Niche ccTLD auctions (.ie, .si, .paris, .tw, .ph, .mx…) |
Authority-only: Regfee Database
100k+ aged ccTLD domains across 60+ TLDs (.fr, .de, .it, .co.uk, .nl, .id, .kz and dozens more) available at registration price. No auction, no bidding war. Same SEO enrichment (TF/CF/DA/backlinks/Wayback) on every entry. Use source=regfree from the MCP search_domains tool with an Authority API key.
SEO Metrics
Every domain is enriched with:
- Quality Score (0-100) — composite score based on age, authority, backlinks, name quality
- Domain Authority (0-100) — from DataForSEO
- Trust Flow / Citation Flow (0-100) — from Majestic via SEObserver
- TTF Topic — topical category (e.g.,
Business/Marketing)
- Referring Domains — unique linking domains count
- Backlinks — total backlink count
- PageRank (0-10) — Open PageRank
- Domain Age — from Wayback Machine first snapshot
- Language — detected from archived content
- Google Business — GMB listing detection
Each domain includes:
{
"id": 12345,
"name": "example.fr",
"tld": ".fr",
"source": "webexpire",
"type": "auction",
"score": 72,
"price": 150.00,
"max_bid": 210.00,
"bids_count": 4,
"auction_end_date": "2026-04-07T15:00:00+00:00",
"age": 19,
"domain_authority": 28,
"trust_flow": 22,
"citation_flow": 16,
"ttf_topic": "Business/Marketing",
"referring_domains": 216,
"backlinks_count": 2000,
"language": "FR",
"has_gmb": false,
"purchase_url": "https://www.webexpire.com/...",
"purchase_platform": "WebExpire"
}
REST API
CatchDoms also offers a REST API at https://catchdoms.com/api/domains. Full documentation.
Links
License
MIT