# Backend

> Tables and schema changes, edge functions, scheduled jobs, access rules, secrets and member login.

Source: https://www.willo.ai/docs/backend

Tables and schema changes, edge functions, scheduled jobs, access rules, secrets and member login.

## Get started

- [Get started with your backend](https://www.willo.ai/docs/backend/get-started): Every Willo business has its own backend for data, member logins, files and server code. What it does, when it appears, and how you work with it.

## Concept

- [Tables and access rules](https://www.willo.ai/docs/backend/tables-and-access-rules): How your backend decides what visitors and members can read and write, why a new table starts locked, and how Willo proves the rules work.
- [Change your database safely](https://www.willo.ai/docs/backend/safe-schema-changes): Why Willo adds before it removes, what a draft does to a database change, and when deleting a table or column needs your explicit say-so.
- [Backend functions](https://www.willo.ai/docs/backend/backend-functions): What backend functions are for, who can call them, how Willo deploys and checks them, and why a function with admin powers needs a caller check.
- [Secrets and API keys](https://www.willo.ai/docs/backend/secrets-and-api-keys): How to give Willo an API key without pasting it into chat, where keys are stored, test keys for drafts, and the credentials Willo never asks for.
- [Scheduled backend jobs](https://www.willo.ai/docs/backend/scheduled-jobs): Run one of your backend functions on a timer, such as a nightly digest or an hourly sync. How often each plan allows, the limits, and how usage is counted.
- [Member login and login email](https://www.willo.ai/docs/backend/member-login-email): How member accounts on your site work, why login emails stop after a couple of sends, and how connecting your own Resend account lifts the limit.

## Guide

- [Add a table and show it on the site](https://www.willo.ai/docs/backend/add-a-table-and-show-it-on-the-site): Store something new in your backend, such as events or a team list, and show it on a page, with the right access rules, tested before it goes live.
- [Run a job on a schedule](https://www.willo.ai/docs/backend/run-a-job-on-a-schedule): Set up a backend job that runs on its own every day or hour, such as a morning summary email, then check that it ran and change or stop it.
- [Connect an outside service](https://www.willo.ai/docs/backend/connect-an-outside-service): Wire your site to a service you already use, such as an email, SMS or AI provider, by giving Willo its API key safely and letting it build the function.