ComfyUI MCP Server
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| RETURN_URL | No | Set to 'false' to receive image data as bytes instead of URLs. Useful when using Docker where downloading to local folder is difficult. | true |
| COMFYUI_HOST | No | The host address of the ComfyUI server | localhost |
| COMFYUI_PORT | No | The port of the ComfyUI server | 8188 |
Instructions
Guidance the server publishes about itself, which clients place ahead of the tool catalog so the model reads it before choosing anything.
This server publishes no instructions, or was last inspected before Glama recorded them.
Capabilities
Server capabilities have not been inspected yet.
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
| text_to_imageB | Generate an image from a prompt. |
| download_imageA | Download an image from a URL and save it to a file. |
| run_workflow_from_fileC | Run a workflow from a file. |
| run_workflow_from_jsonC | Run a workflow from a JSON data. |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
TDQS
Scored across 4 tools
Each tool has a clearly distinct purpose: downloading images, running workflows from files, running workflows from JSON, and generating images from text. There is no overlap in functionality, making it easy for an agent to select the correct tool for any given task without confusion.
All tool names follow a consistent verb_noun pattern with underscores (e.g., download_image, run_workflow_from_file, run_workflow_from_json, text_to_image). This predictable naming scheme enhances readability and usability for agents.
With 4 tools, the server is well-scoped for basic ComfyUI operations, covering key areas like image handling and workflow execution. However, it might feel slightly thin for advanced use cases, such as missing tools for managing workflows or querying server status, but it remains reasonable for its purpose.
The tools cover core functionalities like image generation and workflow execution, but there are notable gaps. For example, there are no tools for listing available workflows, updating or deleting workflows, or handling errors, which could limit agents in more complex scenarios within the ComfyUI domain.