ComfyUI-MiniMax3-H3-Toolkit
ComfyUI custom nodes for building, validating, and documenting MiniMax H3 video workflows.
Nodes (4)
Build the kind of prompt MiniMax H3 actually rewards — no API key, no GPU, no model
The H3 Prompt Validator won't judge your aesthetics — and that's the point
Keep a paper trail for every H3 render — the Run Summary is your seed's alibi
Before you ask 'will my GPU run H3?' — ask the Workflow Advisor
MiniMax H3 Workflow Toolkit for ComfyUI

A small, dependency-free MiniMax H3 ComfyUI toolkit for building clearer local video workflows:
- build structured audiovisual prompts;
- flag missing temporal, camera, audio, or reference guidance;
- produce conservative workflow-starting advice from a hardware profile;
- save a portable text summary of a generation run.
The nodes do not call MiniMax3.org or any other network service. They contain no telemetry, tracking, account login, model download, or paid feature.
Quick start
- Open ComfyUI Manager and search for
MiniMax H3 Workflow Toolkit, or install this repository inComfyUI/custom_nodes/. - Restart ComfyUI and search the node library for
MiniMax H3. - Import a workflow from
example_workflows/and connect its text output to your H3 conditioning workflow. - Follow the MiniMax H3 ComfyUI guide for current model placement, native workflow links, and troubleshooting.
Nodes
MiniMax H3 Prompt Builder
Combines subject, scene, action over time, camera, lighting, motion, dialogue, soundscape, and reference instructions into one readable prompt. The output can be connected to the text input used by a native H3 conditioning workflow.
MiniMax H3 Prompt Validator
Checks basic structure. It does not score aesthetics or predict output quality.
MiniMax H3 Workflow Advisor
Produces cautious starting guidance based on workflow family, VRAM, system RAM, requested resolution, and duration. Its output is not an official hardware minimum or benchmark.
MiniMax H3 Run Summary
Creates a portable record containing mode, resolution, duration, seed, references, and prompt.
Install for development
Copy this directory into ComfyUI/custom_nodes/, restart ComfyUI, then search for MiniMax H3 in the node library.
Example workflows
Import the JSON files from example_workflows/. They demonstrate the toolkit nodes only and do not bundle or download MiniMax H3 model files.
Documentation
For current native workflow links, model placement, VRAM caveats, and troubleshooting, use the maintained guide:
Open the MiniMax H3 ComfyUI setup guide →
The website guide contains optional supplementary information. The custom nodes themselves remain local, dependency-free, and usable without visiting the website.
Publishing checklist
- Confirm the
minimax3-orgpublisher atregistry.comfy.org. - Confirm
PublisherId = "minimax3-org"inpyproject.toml. - Confirm the repository URL under
[project.urls]. - Run the tests and load all example workflows in a current ComfyUI build.
- Publish with the official Comfy CLI or Registry GitHub Action.
Independence
This community utility is independently maintained. It is not affiliated with, endorsed by, or operated by MiniMax or Comfy Org. MiniMax H3 and ComfyUI names may be trademarks of their respective owners.