Building a REST API from an existing database used to require weeks of backend development — setting up a server, writing routes, handling authentication, building documentation. Not anymore.
In this guide, we'll show you how to create a fully functional REST API from your database in under 5 minutes using ApiBanana, with zero code required.
What You'll Need
- A database (MySQL, PostgreSQL, SQL Server, or MongoDB)
- Database connection credentials (host, port, username, password)
- A free ApiBanana account
Step 1: Connect Your Database
Log into your ApiBanana dashboard and click "Add Data Source". Select your database type and enter your connection details. ApiBanana uses AES-256 encryption to store your credentials — they're never stored in plain text.
ApiBanana will test the connection and auto-detect your tables, views, and columns.
Step 2: Create Your First Endpoint
Click "Create Endpoint" and use the visual query builder to define what data to expose. Choose the HTTP method (GET, POST, PUT, DELETE), select the table, pick the fields, and add any filters.
For example, to create an endpoint that returns active customers:
GET /api/v1/customers
Query: SELECT * FROM customers WHERE active = 1 ORDER BY name ASCStep 3: Configure Security
Every endpoint is protected by default with API key authentication. You can also configure:
- Rate limiting — Control how many requests per minute
- IP whitelisting — Restrict access to specific IP addresses
- CORS policies — Control which domains can call your API
Step 4: Deploy and Share
Click deploy and your API is instantly live. ApiBanana auto-generates OpenAPI 3.0 documentation that you can share with your team or clients.
What About Performance?
ApiBanana APIs average 42ms response time. We use connection pooling, query optimization, and edge caching to ensure your APIs are fast and reliable.
Next Steps
- Create your free account and build your first API
- Explore MySQL API builder or PostgreSQL API builder
- Read about API security best practices