Convex

# Convex > Convex is the open source, reactive database where queries are TypeScript code > running right in the database. Just like React components react to state changes, > Convex queries react to database changes. Convex is a great fit for building fullstack apps with Next.js for web and Expo for mobile. It automatically handles storing data on the server, running server-side API functions, moving data between the client and server on WebSockets, state management on the client, and pushing changes for live updates. Server-side data fetching is automatically cached with full consistency, server-side mutators are fully transactional, and clients view consistent snapshots of application state. Convex also includes a scheduler for running background workflows, file storage for large objects, vector search, text search. Convex integrates with Clerk, Auth0, or any OIDC provider for authentication, and users can also use built-in Convex auth. Convex is open-source and can be self-hosted. Convex also offers a managed option with flexible, usage-based pricing. ## Docs ### Get started - [Tutorial](https://docs.convex.dev/tutorial/) - [React Quickstart](https://docs.convex.dev/quickstart/react) - [Next.js Quickstart](https://docs.convex.dev/quickstart/nextjs) - [Remix Quickstart](https://docs.convex.dev/quickstart/remix) - [TanStack Start Quickstart](https://docs.convex.dev/quickstart/tanstack-start) - [React Native Quickstart](https://docs.convex.dev/quickstart/react-native) - [Vue Quickstart](https://docs.convex.dev/quickstart/vue) - [Svelte Quickstart](https://docs.convex.dev/quickstart/svelte) - [Node.js Quickstart](https://docs.convex.dev/quickstart/nodejs) - [Bun Quickstart](https://docs.convex.dev/quickstart/bun) - [Script Tag Quickstart](https://docs.convex.dev/quickstart/script-tag) - [Python Quickstart](https://docs.convex.dev/quickstart/python) - [Android Kotlin Quickstart](https://docs.convex.dev/quickstart/android) - [iOS Swift Quickstart](https://docs.convex.dev/quickstart/swift) - [Rust Quickstart](https://docs.convex.dev/quickstart/rust) ### Platform - [AI Code Generation](https://docs.convex.dev/ai) - [Using Claude Code](https://docs.convex.dev/ai/using-claude-code) - [Using Codex](https://docs.convex.dev/ai/using-codex) - [Using Cursor](https://docs.convex.dev/ai/using-cursor) - [Using Conductor](https://docs.convex.dev/ai/using-conductor) - [Using GitHub Copilot](https://docs.convex.dev/ai/using-github-copilot) - [Convex MCP Server](https://docs.convex.dev/ai/convex-mcp-server) - [Convex Agent Skills](https://docs.convex.dev/ai/agent-skills) - [Agent Mode (background agents)](https://docs.convex.dev/cli/agent-mode) - [Self Hosting](https://docs.convex.dev/self-hosting) ### Understand Convex - [Convex Overview](https://docs.convex.dev/understanding/) - [Dev workflow](https://docs.convex.dev/understanding/workflow) - [Best Practices](https://docs.convex.dev/understanding/best-practices/) - [The Zen of Convex](https://docs.convex.dev/understanding/zen) ### API Reference - [React](https://docs.convex.dev/client/react) - [TanStack Query](https://docs.convex.dev/client/tanstack-query) - [Svelte](https://docs.convex.dev/client/svelte) - [Python](https://docs.convex.dev/client/python) - [Swift](https://docs.convex.dev/client/swift) - [Android Kotlin](https://docs.convex.dev/client/android) - [Convex API](https://docs.convex.dev/api/) - [Generated Code](https://docs.convex.dev/generated-api/) - [HTTP API](https://docs.convex.dev/http-api/) - [Errors](https://docs.convex.dev/error) ## Stack [Stack](https://stack.convex.dev) is the Convex developer portal and blog, sharing bright ideas and techniques for building with Convex. # Guidelines for writing Convex code ## Function guidelines ### New function syntax - ALWAYS use the new function syntax for Convex functions. For example: ```typescript import { query } from "./_generated/server"; import { v } from "convex/values"; export const f = […truncated]