SimplestAPI
SimplestAPI is a backend-as-a-service platform that instantly generates a live REST API from a JSON schema or plain English description. It is specifically designed for apps built with AI coding assistants like Lovable, Bolt, v0, Replit, Cursor, and ChatGPT, allowing them to add persistent data storage without any manual backend setup. Users simply describe their data needs, paste sample JSON, or choose from templates, and SimplestAPI provides a dedicated, fully managed API endpoint complete with LLM-optimized documentation that AI agents can immediately integrate. The service offers a web-based spreadsheet-like interface for direct data editing, full CRUD operations with filtering, pagination, and vector search, and support for end-user authentication via JWKS. Each project gets its own database, and the platform handles scaling, backups, and availability out of the box. Data portability is a key feature—users can download their entire database as a plain SQL file with one click, ensuring no vendor lock-in. SimplestAPI is free to start with no credit card required, and paid plans unlock higher limits (projects, reads, webhooks) as apps grow. It is built to accelerate the prototyping and deployment of AI-generated applications by removing backend friction, making it suitable for MVPs, internal tools, and production use cases alike.
- Category
- AI Agents
- Pricing
- Free
Problem solved
AI-generated frontend apps often lack persistent storage and require tedious manual backend setup. SimplestAPI solves this by providing an instant, fully managed REST API that AI coding assistants can wire up in seconds, enabling apps to remember user data without the developer ever touching a database or writing server code.
Use cases
- Rapid prototyping of AI-built web applications
- Adding persistent data storage to Lovable, Bolt, or v0 projects
- Creating a CRM or directory app without coding a backend
- Building a learning platform with course and student progress tracking
- Running internal tools for startups on a managed backend
- Bootstrapping a newsletter platform with subscriber management
Audience
- Developers
- Startups
- Hobbyists
- Product Managers
Pros
- Instantly generates a REST API from a JSON schema or plain English description
- No database setup, migration, or server management required
- Provides AI-optimized documentation for seamless integration with coding assistants
- Full CRUD, filtering, pagination, and vector search built-in
- Free to start with no credit card, and offers data export to avoid lock-in
Cons
- Limited to REST API; lacks real-time features like WebSockets
- Dependence on external service for data persistence
- Complex server-side logic beyond CRUD operations may not be possible
- Pricing may increase significantly for high-volume applications
- Authentication requires an external identity provider (bring-your-own-auth)
Official website: https://simplestapi.com/
Canonical LambdaBase page: https://www.lambdabase.com/tools/simplestapi