How to Create an AI Postcard Sender with Upstash QStash

The article provides a comprehensive guide on creating an AI-powered postcard-sending application using various technologies and services, including Next.js 13, Upstash QStash for task scheduling, Upstash Redis for caching, Replicate AI for image generation, and Resend for email delivery. The application architecture involves a user filling out a form with details for the postcard, which is then processed through API routes that handle task scheduling, image generation, and email sending. The form captures the recipient's email, a message, an image prompt, and a scheduled time for dispatch. QStash manages task scheduling, triggering the processes at the specified time, while Replicate generates the image and stores the result in Redis. The email, complete with the AI-generated image, is finally sent using Resend. The article also discusses potential improvements, such as verifying requests from QStash and customizing the AI model used for image creation.