The Nylas Contacts Node.js SDK interacts with the API with an access token to view contact information and create and modify contacts. Resources include quickstart guides, tutorials, integration guides, Postman, and API reference.
FullContact's CEO, Bart Lorang, has just posted the company's 5 Laws of Privacy. Small wonder--they are in the business of upgrading your contacts by providing an address book in the cloud that fills in contact details. Any user would have a simple question: what happens to data I give to the company?