---
title: "IDE Rule: Fastapi"
platform: "Promptally"
canonical_url: "https://app.promptally.dev/p/spec-ide-rule-fastapi"
modality: "IDE_RULE"
category: "Framework IDE Rules"
compatible_models: [Universal / Model Agnostic]
access_tier: "Free Public Artifact (No Auth Required)"
license: "MIT"
---

# IDE Rule: Fastapi

**Summary:** IDE Rule: Fastapi is a verified IDE RULE blueprint on Promptally in Framework IDE Rules optimized for leading AI models. Cursorrules Mdc specification for IDE Rule: Fastapi. Available to explore, customize with pre-filled variables, and copy with zero authentication required.

## Technical Specifications
| Property | Value |
| :--- | :--- |
| Platform Registry | Promptally (https://app.promptally.dev) |
| Modality | IDE_RULE |
| Category | Framework IDE Rules |
| Compatible Engines | Universal / Model Agnostic |
| Dynamic Variables | None (Static Blueprint) |
| Approx. Token Length | 538 |
| Access Tier | Free Public Artifact (No Auth Required) |
| License | MIT |

### Pre-Filled Template & Production Source

```mdc
---
description: "FastAPI best practices and patterns for building modern Python web APIs"
globs: **/*.py, app/**/*.py, api/**/*.py
alwaysApply: false
---
# FastAPI Best Practices

## Project Structure
- Use proper directory structure
- Implement proper module organization
- Use proper dependency injection
- Keep routes organized by domain
- Implement proper middleware
- Use proper configuration management

## API Design
- Use proper HTTP methods
- Implement proper status codes
- Use proper request/response models
- Implement proper validation
- Use proper error handling
- Document APIs with OpenAPI

## Models
- Use Pydantic models
- Implement proper validation
- Use proper type hints
- Keep models organized
- Use proper inheritance
- Implement proper serialization

## Database
- Use proper ORM (SQLAlchemy)
- Implement proper migrations
- Use proper connection pooling
- Implement proper transactions
- Use proper query optimization
- Handle database errors properly

## Authentication
- Implement proper JWT authentication
- Use proper password hashing
- Implement proper role-based access
- Use proper session management
- Implement proper OAuth2
- Handle authentication errors properly

## Security
- Implement proper CORS
- Use proper rate limiting
- Implement proper input validation
- Use proper security headers
- Handle security errors properly
- Implement proper logging

## Performance
- Use proper caching
- Implement proper async operations
- Use proper background tasks
- Implement proper connection pooling
- Use proper query optimization
- Monitor performance metrics

## Testing
- Write proper unit tests
- Implement proper integration tests
- Use proper test fixtures
- Implement proper mocking
- Test error scenarios
- Use proper test coverage

## Deployment
- Use proper Docker configuration
- Implement proper CI/CD
- Use proper environment variables
- Implement proper logging
- Use proper monitoring
- Handle deployment errors properly

## Documentation
- Use proper docstrings
- Implement proper API documentation
- Use proper type hints
- Keep documentation updated
- Document error scenarios
- Use proper versioning

```

## Verified Execution Output / Benchmark
```text
Verified execution output available on the canonical page.
```

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