Our free domain availablity APIs. Currently supporting .com only. Has about 95% accuracy for .com domain registrations. By using this API, you agree to not abuse the information and put it to good use. There are no guarantees on reliability as we are still building the processes.
The API supports 1 call every 1 second. (Need faster or bulk? Contact Us!) If that is exceeded, a 429 error code will be thrown. If you see this http code, slow the requests down and wait 1 second.
Why are we offering this? Because we found it way too difficult to find a decent API with listed limits.
API Doc:API: https://www.uidomains.com/domain-availability/ Authentication: None for free
Example: https://www.uidomains.com/domain-availability/facebook.com
Example response: {"domain": "facebook.com" ,"error": false,"available":false}