validTo uses API keys to allow access to our email validation API. To get an API key log into your validTo account and navigate to API page, where you'll find your API key.
To authenticate with the validTo API, simply attach your apikey to the base endpoint URL
Example:
curl -X GET 'https://api.validto.com/v1/verify?apikey=your_api_key&email=email_to_be_checked'
You must replace your_api_key with your actual API key.