About AI App Backend
A backend for apps built with Codex, Cursor, Claude Code or ChatGPT: Postgres, logins, file storage, email, push, scheduled jobs and hosting in one place your AI agent can drive.
What is Floot?
Floot is a backend for AI-built apps that gives your coding agent a Postgres database, logins, storage and email through one MCP server, so you don't wire up five services yourself.
If you build with Codex or Cursor, the code comes fast and the backend is where you get stuck: which database, which auth provider, where the API runs, how email goes out. Floot puts those pieces in one platform with one MCP server, so your agent can add them as it builds.
Why build it with Floot?
The backend is where AI-built apps get stuck: each service has its own dashboard, keys and limits that an agent can't see. Floot puts the backend in one platform with one MCP server.
How Floot works
Add Floot to the AI you already use from its listing in the Claude or ChatGPT directory, or the Cursor Marketplace. There is no address to copy.
- Add Floot's MCP server to Codex or Cursor.
- Ask the agent to build the app on Floot, naming the data it stores.
- Ask for logins, email or payments as you need them.
- Publish to a live URL and add your domain.
For example, you could start with this prompt:
Use Floot as the backend. Create a Postgres table for bookings (customer name, email, start time, status), add email sign-in, an endpoint to create a booking, and send a confirmation email when one is made.
What can you use Floot for?
- First prototype: Get a database and sign-in on day one instead of mocking data.
- First paying users: Add Floot Payments subscriptions, email receipts and a custom domain.
- Growing app: Scheduled jobs, background tasks, push notifications and native phone apps.
Who is it for?
Builders using Codex, Cursor, Claude Code or ChatGPT who want a working backend without choosing and connecting a separate database, auth provider and host.
Who founded Floot?
Floot was founded by Yujian Yao, who is its CEO.
Is Floot backed by Y Combinator?
Yes. Floot is backed by Y Combinator and was part of the Summer 2025 batch (YC S25).
What does Floot include?
- Postgres per app: Each project can have its own Postgres database. The agent creates tables and runs migrations; you can download the whole database on any plan.
- Auth without a separate provider: Email, Google and Microsoft sign-in, sessions and roles live in the app itself.
- API endpoints and jobs: Server endpoints, scheduled jobs and background tasks run on Floot, including work that continues with nobody online.
- Storage, email and push: File uploads, sending and receiving email, and web and phone push notifications are built-in services.
- Payments: Floot Payments handles checkout and subscriptions, paid out through Stripe.
- One MCP server: Codex, Cursor, Claude Code, Claude and ChatGPT all reach the same tools, so you can switch agents without moving the app.
Frequently asked questions
Is there a service that handles the backend and hosting for apps I build with Codex?
Floot does: it gives the app a Postgres database, logins, endpoints, storage, email and hosting, and Codex drives it through Floot's MCP server.
Can I use Cursor with Floot?
Yes. Add Floot as an MCP server in Cursor and ask it to build on Floot.
Do I need separate accounts for a database, auth and hosting?
No. They are all part of the Floot project.
Can I get my data out?
Yes. Database export is available on every plan; paid plans can also download the code.