get_node_info
Retrieve configuration details for ComfyUI workflow nodes, including inputs, outputs, and functionality, to understand how to properly set up nodes in automation pipelines.
Instructions
Get detailed info about a node.
Args:
node_name: Node class name (e.g., 'RemoteCheckpointLoader_fal')
Returns node information including:
- input: Required and optional inputs with types
- output: Output types
- category: Node category
- description: What the node does
Use this to understand how to configure a node in a workflow.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| node_name | Yes | Exact node class name |
Implementation Reference
- MCP tool handler for get_node_info. Fetches node details from ComfyUI /object_info endpoint, parses with NodeInfo model, handles errors.
@mcp.tool() def get_node_info( node_name: str = Field(description="Exact node class name"), ctx: Context = None, ) -> dict: """Get detailed info about a node. Args: node_name: Node class name (e.g., 'RemoteCheckpointLoader_fal') Returns node information including: - input: Required and optional inputs with types - output: Output types - category: Node category - description: What the node does Use this to understand how to configure a node in a workflow. """ if ctx: ctx.info(f"Fetching info for: {node_name}") try: result = comfy_get(f"/object_info/{node_name}") if node_name in result: data = result[node_name] data["name"] = node_name # Ensure name is set info = NodeInfo(**data) return info.model_dump() return ErrorResponse.not_found( f"Node '{node_name}'", suggestion="Use list_nodes() to see available nodes", ).model_dump() except Exception as e: return ErrorResponse.unavailable(str(e)).model_dump() - src/comfy_mcp_server/models.py:79-92 (schema)Pydantic model defining the structure and validation for node information output by the tool.
class NodeInfo(BaseModel): """Information about a ComfyUI node from /object_info.""" name: str display_name: str | None = None description: str | None = None category: str | None = None input: NodeInput = Field(default_factory=NodeInput) output: list[str] = Field(default_factory=list) output_name: list[str] = Field(default_factory=list) output_node: bool = False deprecated: bool = False experimental: bool = False - src/comfy_mcp_server/tools/__init__.py:22-28 (registration)Registration function that calls register_discovery_tools(mcp), which defines and registers the get_node_info tool.
def register_all_tools(mcp): """Register all tools with the MCP server.""" register_system_tools(mcp) register_discovery_tools(mcp) register_workflow_tools(mcp) register_execution_tools(mcp) - src/comfy_mcp_server/api.py:247-250 (helper)Helper function in API module that performs the core API call used by the tool handler.
def get_node_info(node_name: str) -> dict: """Get info for a specific node.""" return comfy_get(f"/object_info/{node_name}") - src/comfy_mcp_server/models.py:72-77 (schema)Pydantic model for node input schema used within NodeInfo.
class NodeInput(BaseModel): """Node input specification.""" required: dict[str, Any] = Field(default_factory=dict) optional: dict[str, Any] = Field(default_factory=dict)