CheckCheck
CheckCheck is a high-performance domain availability API built for developers, SaaS tools, and naming platforms that need instant and reliable results. It combines DNS, WHOIS, and TLD validation to deliver fast, accurate availability checks across hundreds of extensions. Why CheckCheck? Ultra-fast responses (10–50ms) using optimized DNS lookups. Highly accurate results by combining DNS and WHOIS…
2 subscribers
9.2/10 popularity
3371 ms avg latency
100% success rate
9 endpoints
The in-depth APIMemo review for this API hasn't been published yet —
the data below comes straight from the public marketplace listing.
CheckCheck endpoints
| Method | Endpoint | Description |
|---|---|---|
| Domain Availability | ||
| POST |
checkDomain /v1/domain |
Check if a complete domain (e.g., example.com) is available for registration. Supports optional WHOIS lookup for detailed information. |
| POST |
checkNameTld /v1/name-tld |
Check domain availability by providing name and TLD separately. Useful when iterating through TLD options. |
| POST |
checkBulk /v1/bulk |
Check multiple domains at once (max 50 per request). Available on PRO tier and above. Significantly faster than individual requests. |
| Health | ||
| GET |
healthCheck /health |
Check if the API is online and responding |
| GET |
getDocs /v1/docs |
Get API documentation and pricing information |
| Other endpoints | ||
| POST |
bulkCheck /v1/bulk |
Check up to 50 domains in a single request. Domains are checked in parallel for maximum performance. Mix domain strings and name+TLD combinations. |
| GET |
healthCheck /health |
Returns API health status and version |
| POST |
checkNameTld /v1/name-tld |
Checks domain availability by submitting the name and TLD as separate fields. Ideal for generating domain combinations or bulk name generation workflows. Returns DNS results,… |
| POST |
checkDomain /v1/domain |
Check if a single domain is available for registration. Uses DNS lookups by default, with optional WHOIS data. |
CheckCheck pricing
| Plan | Price | Rate limit | Quotas |
|---|---|---|---|
| BASIC | Free | 5 / minute |
|
| PRO | $9.99 / month | 30 / minute |
|
| ULTRA Recommended | $49.99 / month | 150 / minute |
|
| MEGA | $199 / month | 500 / minute |
|
