Antideo is an API service that helps in identifying disposable/temporary email address, know spam or scam emails, email health, free or a company domain, IP health check, location detection and phone number validation services. Our clients are able to ensure that they are able to ensure the quality of their inbound leads from their online forms and their sales team spend their effort on the right leads
Nacapi - Turn your JSON into a restful API
Numverify - Global phone number validation and lookup API
JsonAPI - Application and Data, Languages & Frameworks, and Query Languages
RealValidito - Phone Validator | Free Phone Number Validation & Phone Number Lookup Service | Realvalidito
ReqRes - A hosted REST-API ready to respond to your AJAX requests.
NumValidate - Phone number validation REST API. Simple, Free, and Open Source.