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RunComfy

Longcat Image Edit: Fast Image-to-Image Model with precise text editing on playground and API | RunComfy

meituan/longcat-image/edit

Transform images through natural language with precise, high-fidelity edits, superior text rendering, and style-consistent, high-resolution image-to-image generation for designers and creative professionals.

1. Get started

Use RunComfy's API to run meituan/longcat-image/edit. For accepted inputs and outputs, see the model's schema.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/meituan/longcat-image/edit \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "Add the text 'RunComfy' in elegant cursive font on the table cloth behind the plate.",
    "image_url": "https://playgrounds-storage-public.runcomfy.net/tools/7265/media-files/input-1-1.png"
  }'

2. Authentication

Set the YOUR_API_TOKEN environment variable with your API key (manage keys in your Profile) and include it on every request as a Bearer token via the Authorization header: Authorization: Bearer $YOUR_API_TOKEN.

3. API reference

Submit a request

Submit an asynchronous generation job and immediately receive a request_id plus URLs to check status, fetch results, and cancel.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/meituan/longcat-image/edit \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "Add the text 'RunComfy' in elegant cursive font on the table cloth behind the plate.",
    "image_url": "https://playgrounds-storage-public.runcomfy.net/tools/7265/media-files/input-1-1.png"
  }'

Monitor request status

Fetch the current state for a request_id ("in_queue", "in_progress", "completed", or "cancelled").

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/status \
  --header "Authorization: Bearer <token>"

Retrieve request results

Retrieve the final outputs and metadata for the given request_id; if the job is not complete, the response returns the current state so you can continue polling.

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/result \
  --header "Authorization: Bearer <token>"

Cancel a request

Cancel a queued job by request_id, in-progress jobs cannot be cancelled.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/cancel \
  --header "Authorization: Bearer <token>"

4. File inputs

Hosted file (URL)

Provide a publicly reachable HTTPS URL. Ensure the host allows server‑side fetches (no login/cookies required) and isn't rate‑limited or blocking bots. Recommended limits: images ≤ 50 MB (~4K), videos ≤ 100 MB (~2–5 min @ 720p). Prefer stable or pre‑signed URLs for private assets.

5. Schema

Input schema

{
  "type": "object",
  "title": "Input",
  "required": [
    "prompt",
    "image_url"
  ],
  "properties": {
    "prompt": {
      "title": "Prompt",
      "description": "",
      "type": "string",
      "default": "Add the text 'RunComfy' in elegant cursive font on the table cloth behind the plate."
    },
    "num_inference_steps": {
      "title": "Number of Inference Steps",
      "description": "",
      "type": "integer",
      "minimum": 1,
      "maximum": 50,
      "default": 28
    },
    "guidance_scale": {
      "title": "Guidance Scale",
      "description": "The guidance scale to use for the image generation.",
      "type": "float",
      "minimum": 1,
      "maximum": 20,
      "default": 4.5
    },
    "seed": {
      "title": "Seed",
      "description": "",
      "type": "integer",
      "default": 0
    },
    "output_format": {
      "title": "Output Format",
      "description": "The format of the generated image.",
      "type": "string",
      "enum": [
        "jpeg",
        "png",
        "webp"
      ],
      "default": "png"
    },
    "image_url": {
      "title": "Image",
      "description": "The URL of the image to edit.",
      "type": "string",
      "default": "https://playgrounds-storage-public.runcomfy.net/tools/7265/media-files/input-1-1.png"
    }
  }
}

Output schema

{
  "output": {
    "type": "object",
    "properties": {
      "image": {
        "type": "string",
        "format": "uri",
        "description": "single image URL"
      },
      "video": {
        "type": "string",
        "format": "uri",
        "description": "single video URL"
      },
      "images": {
        "type": "array",
        "description": "multiple image URLs",
        "items": { "type": "string", "format": "uri" }
      },
      "videos": {
        "type": "array",
        "description": "multiple video URLs",
        "items": { "type": "string", "format": "uri" }
      }
    }
  }
}