{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://github.com/Comfy-Org/ComfyUI/blob/main/schemas/prompt.json",
  "title": "ComfyUI Prompt Format",
  "description": "JSON Schema for the ComfyUI /prompt endpoint. Each key is a unique node ID, and each value describes a node with its class_type, inputs, and optional metadata.",
  "type": "object",
  "additionalProperties": {
    "$ref": "#/definitions/node"
  },
  "definitions": {
    "node": {
      "type": "object",
      "required": ["class_type", "inputs"],
      "properties": {
        "class_type": {
          "type": "string",
          "description": "The node class to instantiate. Must match a key in NODE_CLASS_MAPPINGS."
        },
        "inputs": {
          "$ref": "#/definitions/inputs"
        },
        "_meta": {
          "type": "object",
          "description": "Optional UI metadata for a node.",
          "properties": {
            "title": {
              "type": "string",
              "description": "Display title for the node in the UI."
            }
          }
        }
      },
      "additionalProperties": true
    },
    "inputs": {
      "type": "object",
      "description": "Node inputs. Keys are parameter names. Values are either direct values or node links [source_id, output_index].",
      "additionalProperties": true
    },
    "node_link": {
      "type": "array",
      "description": "A link to another node's output.",
      "items": [
        {"type": "string", "description": "Source node ID"},
        {"type": "integer", "description": "Output index of the source node"}
      ],
      "minItems": 2,
      "maxItems": 2
    }
  },
  "examples": [
    {
      "4": {
        "class_type": "CheckpointLoaderSimple",
        "inputs": {"ckpt_name": "v1-5-pruned-emaonly.safetensors"}
      },
      "5": {
        "class_type": "EmptyLatentImage",
        "inputs": {"width": 512, "height": 512, "batch_size": 1}
      },
      "6": {
        "class_type": "CLIPTextEncode",
        "inputs": {"text": "a beautiful landscape", "clip": ["4", 1]}
      },
      "7": {
        "class_type": "CLIPTextEncode",
        "inputs": {"text": "ugly, blurry", "clip": ["4", 1]}
      },
      "3": {
        "class_type": "KSampler",
        "inputs": {
          "seed": 123456, "steps": 20, "cfg": 7.0,
          "sampler_name": "euler", "scheduler": "normal", "denoise": 1.0,
          "model": ["4", 0], "positive": ["6", 0], "negative": ["7", 0],
          "latent_image": ["5", 0]
        }
      },
      "8": {
        "class_type": "VAEDecode",
        "inputs": {"samples": ["3", 0], "vae": ["4", 2]},
        "_meta": {"title": "VAE Decode"}
      },
      "9": {
        "class_type": "SaveImage",
        "inputs": {"filename_prefix": "ComfyUI", "images": ["8", 0]}
      }
    }
  ]
}