Meituan LongCat Image Edit API | Pricing & Docs

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" }
      }
    }
  }
}

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RunComfy is the premier ComfyUI platform, offering ComfyUI online environment and services, along with ComfyUI workflows featuring stunning visuals. RunComfy also provides AI Models, enabling artists to harness the latest AI tools to create incredible art.

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