Moosey CMS 🫎
A lightweight, drop-in Markdown CMS for FastAPI.
Moosey CMS turns a FastAPI application into a content-driven website using Markdown files, YAML frontmatter, and Jinja templates - no database required.
Features
- File-based Markdown content with automatic URL routing
- Jinja template resolution and sandboxed expressions
- Hot reloading and content-aware caching
- Visual admin for content, frontmatter, and static assets
- Git-backed file history, diff previews, and rollback
- SEO metadata, sitemaps, robots.txt, and RSS feeds
- Responsive image processing and CDN support
- JSON API for content management
Features that replace paid services
| Moosey CMS feature | Can replace |
|---|---|
Responsive image generation, srcset, local transforms, and CDN URL support |
Cloudinary, Imgix, and ImageKit |
| Open Graph, Twitter Cards, JSON-LD, canonical URLs, sitemaps, robots.txt, and RSS feeds | Yoast SEO Premium, Rank Math Pro, and managed SEO tooling |
| Markdown content management, a visual admin, structured metadata, file uploads, and a CRUD API | Contentful, Sanity, Ghost(Pro), and hosted headless CMS platforms |
| Automatic Git history, version tracking, diff previews, and one-click rollback | Contentful revisions, headless CMS version history, and Git-based CMS platforms |
Installation
Install every optional feature, including image processing and face-aware cropping:
uv add 'moosey-cms[all]'
# or
pip install 'moosey-cms[all]'
Choose a smaller installation when you do not need every feature:
| Package | Included features |
|---|---|
moosey-cms |
Core CMS |
moosey-cms[images] |
Core CMS and Pillow image processing |
moosey-cms[faces] |
Image processing and OpenCV face-aware cropping |
moosey-cms[all] |
All optional features |
Use the same package specifier with uv add or pip install.
Quick start
Scaffold and run a complete site:
moosey-cms init ./my-site
cd my-site
moosey-cms dev
Open http://localhost:8000. To add the admin UI to an existing project:
moosey-cms admin --templates ./templates --static ./static
See Getting Started for manual FastAPI setup, optional dependencies, and production commands.
Documentation
| Guide | Covers |
|---|---|
| Getting Started | Installation, setup, configuration, and the example app |
| CLI | Project scaffolding, admin installation, and server commands |
| Admin Dashboard & API | Admin UI, Git history, authentication, and JSON endpoints |
| Templates | Template resolution, layouts, collections, and pagination |
| Frontmatter | Supported metadata and project overrides |
| Markdown | Rendering and enabled Markdown extensions |
| Filters | Complete Jinja filter reference |
| Images | Responsive images, transforms, face detection, and CDNs |
| SEO | Metadata, structured data, sitemaps, robots.txt, and feeds |
| Security | Sanitization, CSP, template sandboxing, and deployment guidance |
| Patterns | Practical project structures and conventions |
The example/ project is a working reference implementation.
Development
uv sync
uv run pytest
Please report bugs and security issues through the GitHub issue tracker.
License
MIT License. Copyright © 2026 Anthony Mugendi.
Inspired by fastapi-blog by Daniel Roy Greenfeld.
1 maintainer
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