The Twilio + PayPalX Developer Contest is now open until October 31, where developers can submit applications that combine Twilio's Voice and SMS APIs with PayPal's Adaptive Payment API for a chance to win $350 in prizes. The contest aims to find innovative apps that utilize the powerful payments platform and voice and SMS APIs to establish ongoing payment relationships with customers. Previous entries are eligible to participate again, and the deadline for submission is October 31 at 11:59pm PT. Additionally, PayPalX's second annual developer conference will take place next week in San Francisco, featuring a hackathon where participants can get access to employees from both PayPal and Twilio to help them optimize the APIs, with prizes available for attendees.