Domain Availability API
Check domain availability in bulk — up to 50 domains per call. Detects premium names with registration pricing. From $0.02/call.
Check whether a domain is available to register — or check up to 50 domains in a single call. Returns availability status, premium-name flags with registration/renewal pricing, ICANN fees, and early-access fees. Perfect for domain generators, brandability tools, and domain investors.
Try it live
Fill in the fields and hit Run to see a real response.
{
"ok": true,
"data": {
"domains": [
{
"domain": "example.com",
"available": false,
"isPremium": false,
"premiumRegistrationPrice": 0,
"premiumRenewalPrice": 0,
"icannFee": 0,
"eapFee": 0
},
{
"domain": "some-unique-name-xyz-123.com",
"available": true,
"isPremium": false,
"premiumRegistrationPrice": 0,
"premiumRenewalPrice": 0,
"icannFee": 0.18,
"eapFee": 0
},
{
"domain": "cars.ai",
"available": true,
"isPremium": true,
"premiumRegistrationPrice": 2450,
"premiumRenewalPrice": 95,
"icannFee": 0,
"eapFee": 0
}
]
}
}Features
Pass one domain or up to 50 (one per line) in the domains field, and each comes back with its own availability status in a single response.
Every result carries an isPremium flag plus premiumRegistrationPrice and premiumRenewalPrice, so you surface a $2,450 premium name with its real cost alongside standard availability.
Each domain returns icannFee and eapFee values, giving you the full registration cost picture rather than just an available/taken boolean.
Check .com, .io, .ai, .app and beyond in the same call, so a naming tool can scan a name across dozens of extensions at once.
All 50 domains resolve in a single request, so a bulk availability scan returns as one fast response instead of 50 separate lookups.
Use cases
Domain Name Generators
Generate candidate names and instantly check which ones are available to register, surfacing premium names and their prices in the same response.
Brand Launch Tools
Let users check availability across dozens of TLDs (.com, .io, .ai, .app, etc.) in a single API call as part of a naming or brand-kit workflow.
Domain Investing
Score expiring or backordered domains by pulling availability + premium pricing data in bulk for research and acquisition.
Quick start
Copy this snippet and start making calls.
const res = await fetch('https://api.yepapi.com/v1/seo/domain/available', {
method: 'POST',
headers: {
'x-api-key': 'YOUR_API_KEY',
'Content-Type': 'application/json',
},
body: JSON.stringify({
"domains": [
"example.com",
"example.io",
"example.ai"
]
}),
});
const data = await res.json();
console.log(data);The domain availability API for developers — check up to 50 domains and premium pricing per call
The Domain Availability API checks whether domains are registrable — up to 50 in one call — and returns availability, premium flags with registration and renewal pricing, ICANN fees, and EAP fees per domain. It is the engine for name generators and brand-kit tools.
It is the registrability tool in YepAPI's domain suite. Pair it with the Whois endpoint — one key — to check availability of free names and pull registration records for taken ones in a single naming workflow.
What is a domain availability API?
A domain availability API tells you whether a domain can be registered and at what cost, as data. For each domain you get an available boolean, an isPremium flag, premiumRegistrationPrice and premiumRenewalPrice, plus icannFee and eapFee. So example.com may come back unavailable while cars.ai is available but premium at $2,450 to register and $95 to renew. The bulk-friendly design — up to 50 domains per call — is what makes it suited to generators. YepAPI serves it at /v1/seo/domain/available: post a newline-separated list and receive a per-domain availability and pricing array.
Build your own domain name generator
Build a name generator that produces candidate names and checks all of them in one call, instantly showing which are free and flagging premium names with their prices so users see the real cost up front. Build a brand-kit tool that scans a chosen name across .com, .io, .ai, and .app simultaneously. The icannFee and eapFee fields let you display an accurate total, not just "available." Because a single request handles 50 domains, your UI stays snappy even when scanning a long candidate list.
Domain availability API pricing — $0.02/call
Each call is a flat $0.02 and checks up to 50 domains at once, so a full 50-name scan is two cents — about $0.0004 per domain. There is no per-domain surcharge. Competing availability APIs charge around $0.04–$0.05 per call and gate commercial use behind paid tiers; here a high-volume generator can run thousands of name checks for a few dollars with no subscription.
Bulk availability checks at scale
Generate hundreds of name candidates and batch them 50-per-call to scan a huge namespace quickly and cheaply. For domain investors, the isPremium and premium pricing fields let you score expiring or candidate names by acquisition cost in bulk. The flat per-call price and 50-domain batching mean cost scales with batches, not individual domains, so scanning 1,000 names costs roughly $0.40 across 20 calls — viable for continuous discovery workflows.
Try the domain availability API free
Start with $5 of free credit, no credit card — enough for thousands of domain checks given 50 per call. Run a batch including names you know are taken, free, and premium to confirm the flags and pricing fields, then wire the bulk response into your generator before you pay.
Start making API calls in 30 seconds
$5 free credit on signup. No credit card required. Pay per call.
What developers say
“Switched from SerpAPI and cut our SERP costs by 80%. Same data quality, way simpler billing.”
“One API key for AI models, SERP data, and web scraping. Saved us from managing 4 separate providers.”
“The $5 free credit let us prototype our entire rank tracking feature before committing. No other API does that.”
Frequently asked questions
Check whether a domain is available to register — or check up to 50 domains in a single call. Returns availability status, premium-name flags with registration/renewal pricing, ICANN fees, and early-access fees. Perfect for domain generators, brandability tools, and domain investors.
Each API call costs $0.02. No monthly minimums or subscriptions — you only pay for what you use.
Sign up for a free API key, then send a POST request to /v1/seo/domain/available. Check the code example above for a ready-to-use snippet in JavaScript, cURL, or Python.
YepAPI bundles SEO, AI, and web scraping APIs under one key with no monthly minimums. You get lower per-call pricing, a unified dashboard, and one billing account instead of managing multiple providers.
Ready to integrate?
Get your API key and start making calls in 30 seconds. $5 free credit on signup — no credit card required.
More seo apis endpoints
Keywords
$0.15Keyword research API with search volume, CPC, difficulty, competition, and 12-month trends. Up to 100 keywords per request from $0.15/call.
Keyword Ideas
$0.02Generate hundreds of keyword ideas from any seed keyword with volume, CPC, and difficulty scores. Content planning and topic expansion from $0.03/call.
Related Keywords
$0.02Discover semantically related keywords and variations with volume, CPC, and difficulty. Build topical authority from $0.03/call.