> ## Documentation Index > Fetch the complete documentation index at: https://docs.xano.com/llms.txt > Use this file to discover all available pages before exploring further. # Logic & Workflows > Everything you can build with Xano's logic engine — APIs, functions, tasks, triggers, and middleware. Xano's logic engine is where your backend comes to life. Build workflows that handle requests, run on schedules, react to events, and more — visually, with code, or with AI. Build HTTP endpoints that power your apps. Define inputs, add logic, query data, and return responses — all from one place. Create reusable blocks of logic that can be called from APIs, tasks, triggers, or other functions. Schedule logic to run on a timer (cron jobs) or execute long-running processes in the background. Run workflows automatically in response to events — database changes, realtime messages, agent actions, and more. Add logic that executes before or after other workflows — useful for auth checks, logging, and request validation. Fetch related data alongside your queries — join tables, aggregate results, and enrich responses without extra requests. *** ## Building blocks These are the shared components and concepts used across all logic types. Inputs, logic statements, functions, filters, and responses — the pieces every workflow is made of. Variables, environment variables, and dot notation — how you store, access, and transform data inside logic.