Keep track of your inventory of 3D-printer filament spools.

Spoolman is a self-hosted web service designed to help you efficiently manage your 3D printer filament spools and monitor their usage. It acts as a centralized database that seamlessly integrates with popular 3D printing software like OctoPrint and Klipper/Moonraker. When connected, it automatically updates spool weights as printing progresses, giving you real-time insights into filament usage.

Features

• Filament Management: Keep comprehensive records of filament types, manufacturers, and individual spools.
• API Integration: The REST API allows easy integration with other software, facilitating automated workflows and data exchange.
• Real-Time Updates: Stay informed with live spool updates through Websockets, providing immediate feedback during printing operations.
• Central Filament Database: A community-supported database of manufacturers and filaments simplify adding new spools to your inventory. Contribute by heading to SpoolmanDB.
• Web-Based Client: Spoolman includes a built-in web client that lets you manage data effortlessly:
  • View, create, edit, and delete filament data.
  • Search, group and filter your inventory by manufacturer, material, location and more.
  • Add custom fields to tailor information to your specific needs.
  • Design and print labels with QR codes for easy spool identification and tracking.
  • Contribute to its translation into 18 languages via Weblate.
• Database Support: SQLite, PostgreSQL, MySQL, and CockroachDB.
• Multi-Printer Management: Handles spool updates from several printers simultaneously.
• Advanced Monitoring: Integrate with Prometheus for detailed historical analysis of filament usage, helping you track and optimize your printing processes. See the Wiki for instructions on how to set it up.

Spoolman integrates with:

• Moonraker and most front-ends (Fluidd, KlipperScreen, Mainsail, ...)
• OctoPrint
• OctoEverywhere
• Home Assistant
• MCP Server - Manage your filament inventory through AI assistants like Claude using the Model Context Protocol

Web client preview:

Installation

Please see the Installation page on the Wiki for details how to install Spoolman.

If the new client misbehaves on your setup, set SPOOLMAN_LEGACY_CLIENT=TRUE to go back to the previous one. Both ship in every release and talk to the same API, so your data is untouched either way — but please report the problem so it can be fixed.

Sponsors

Spoolman is developed and maintained in my spare time. If it is useful to you, consider sponsoring the project.