Reference Inpaint

Inpaint a region of a target photo using a reference image as the visual guide. Provide the target, a black-and-white mask of the area to fill, and a reference image. The model paints the masked region with content matching the reference.

Pricing: $0.55/request. Endpoint: POST /v1/models/runflow/reference-inpaint/runs.

Inpaint a region of a target photo using a reference image as the visual guide. Provide the target, a black-and-white mask of the area to fill, and a reference image. The model paints the masked region with content matching the reference.

Overview

• Endpoint: https://api.runflow.io/v1/models/runflow/reference-inpaint/runs
• Model ID: runflow/reference-inpaint
• Provider: Runflow
• License: commercial
• Last Updated: 2026-05-05

Pricing

• Base price: $0.55/request
• Note: Per image: reference inpaint

Reference Inpaint API

Endpoint: POST /v1/models/runflow/reference-inpaint/runs

Run the model

Python

import requests

response = requests.post(
    "https://api.runflow.io/v1/models/runflow/reference-inpaint/runs",
    headers={"Authorization": "Bearer RUNFLOW_API_KEY"},
    json={
        "input": {
            "zip_url": "https://public.runflow.io/images/models/runflow/reference-inpaint/examples/1/inputs.zip",
            "file_mask": "mask.png",
            "file_input": "photo.png",
            "file_reference": "reference.png"
        },
        "callback_url": "https://your-server.com/webhook"
    },
)

data = response.json()
print(data)

Node.js

const response = await fetch(
  "https://api.runflow.io/v1/models/runflow/reference-inpaint/runs",
  {
    method: "POST",
    headers: {
      "Authorization": "Bearer RUNFLOW_API_KEY",
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
        "input": {
            "zip_url": "https://public.runflow.io/images/models/runflow/reference-inpaint/examples/1/inputs.zip",
            "file_mask": "mask.png",
            "file_input": "photo.png",
            "file_reference": "reference.png"
        },
        "callback_url": "https://your-server.com/webhook"
    }),
  }
);

const data = await response.json();
console.log(data);

cURL

curl -X POST https://api.runflow.io/v1/models/runflow/reference-inpaint/runs \
  -H "Authorization: Bearer $RUNFLOW_API_KEY" \
  -H "Content-Type: application/json" \
  --data-binary @- <<'JSON'
{
    "input": {
        "zip_url": "https://public.runflow.io/images/models/runflow/reference-inpaint/examples/1/inputs.zip",
        "file_mask": "mask.png",
        "file_input": "photo.png",
        "file_reference": "reference.png"
    },
    "callback_url": "https://your-server.com/webhook"
}
JSON

Request parameters

Parameter	Type	Required	Description
input	object	required	Model input parameters. See “Input schema” below.
callback_url	string | null	optional	Webhook URL - POSTed when the run reaches a terminal state.
metadata	object | null	optional	Arbitrary key-value pairs attached to the run.

Input schema

Field	Type	Required	Allowed values	Description
zip_url	file	required	Any	URL of a zip archive containing the target image, mask, and reference image. Use file_input + file_mask + file_reference to name the files inside.
file_input	string	required	Any	Filename inside zip_url of the photo to edit (e.g. photo.png).
file_mask	string	required	Any	Filename inside zip_url of the black-and-white mask. White pixels mark the area to inpaint, black pixels mark what to keep.
file_reference	string	required	Any	Filename inside zip_url of the reference image whose visual content should fill the masked area.
prompt	string	optional	Any	Optional override for the scene description. Leave empty to use the default.

Output schema

Field	Type	Description
outputs	json	Array of result items, each with at minimum a url field.
seed	json	Random seed used (null if N/A).
timing	json	Provider timing breakdown (null if not surfaced).
nsfw_detected	json	Provider NSFW flag (null if not surfaced).

Callback payload

When you provide a callback_url, Runflow POSTs to it once the run reaches a terminal state.

Field	Type	Description
event	string	Event type: “run.completed”, “run.failed”, or “run.cancelled”.
run_id	string	The unique identifier of the run.
status	string	Terminal status: “succeeded”, “failed”, or “cancelled”.
output	object | null	The run output. Null if the run failed or was cancelled.
duration_ms	number | null	Total run duration in milliseconds.
created_at	string | null	ISO 8601 timestamp when the run was created.
completed_at	string | null	ISO 8601 timestamp when the run reached terminal state.
metadata	object | null	The metadata object passed at run creation, if any.

• Retries: 3 attempts with exponential backoff (1s, 2s). Retries on 5xx / network errors only.
• Headers: Runflow-Request-Id is always sent. Runflow-Signature is sent if a signing secret is configured.

Additional Resources

• Playground
• API Reference
• Documentation
• OpenAPI

Related

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Run lifecycle

Callbacks, polling, statuses.

Callbacks

Handle async results.

Pricing

How requests bill out.