The Nexmo SMS Verify API and Number Insight API have been integrated into the RapidAPI Marketplace, offering robust solutions for phone number authentication and intelligence. The Number Insight API provides varying levels of detail about phone numbers, such as validity, reachability, and roaming status, through Basic, Standard, and Advanced options, with pricing based on the level of information requested. The Verify API enables two-step authentication via SMS, helping to prevent spam, enhance security, and ensure user contactability by sending a verification code to users' phones. This API is priced based on a credit system, varying by region. Both APIs are designed to simplify the integration process with easy-to-use code snippets, making them accessible for developers seeking to enhance security and contact accuracy in their applications.