> ## Documentation Index
> Fetch the complete documentation index at: https://dripart-stale2000-router-model-pages.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Use Patina with Comfy Router

> Call fal/patina through Comfy Router: endpoint, request shape and the response Router returns.

API Reference for `fal/patina`, served by Comfy Router from fal.

## Quick start

Create a key at [platform.comfy.org/profile/api-keys](https://platform.comfy.org/profile/api-keys) and export it as `COMFY_API_KEY`. The Python and TypeScript snippets use the Comfy SDKs (`pip install comfy-sdk`, `npm install @comfyorg/sdk`); the cURL snippet is the same call over raw HTTP.

**Model ID:** `fal/patina`

**Endpoint:** `POST https://api.comfy.org/v2/models/fal/patina`

<CodeGroup>
  ```python Python theme={null}
  from comfy_sdk import Comfy

  # Reads COMFY_API_KEY from the environment.
  # The SDK automatically creates an idempotency key and reuses it for automatic retries.
  with Comfy() as client:
      result = client.models.run(
          "fal/patina",
          {
              "image_url": "https://storage.googleapis.com/falserverless/gallery/patina-blog-hero-render.png",
          },
      )

  print(result)
  ```

  ```typescript TypeScript theme={null}
  import { comfy } from "@comfyorg/sdk";

  // Reads COMFY_API_KEY from the environment.
  // The SDK automatically creates an idempotency key and reuses it for automatic retries.
  const { data } = await comfy.models.run("fal/patina", {
    image_url: "https://storage.googleapis.com/falserverless/gallery/patina-blog-hero-render.png",
  });

  console.log(data);
  ```

  ```bash cURL theme={null}
  curl https://api.comfy.org/v2/models/fal/patina \
    -H "X-API-Key: $COMFY_API_KEY" \
    -H "Idempotency-Key: $(uuidgen)" \
    -H "Content-Type: application/json" \
    -d "{\"image_url\": \"https://storage.googleapis.com/falserverless/gallery/patina-blog-hero-render.png\"}"
  ```
</CodeGroup>

## Schema

### Input

<ParamField body="enable_safety_checker" type="boolean" default="true">
  Enable the safety checker for images.
</ParamField>

<ParamField body="image_url" type="string" required>
  URL of the input image (photograph or render).
</ParamField>

<ParamField body="maps" type="string[]" default="[&#x22;basecolor&#x22;,&#x22;normal&#x22;,&#x22;roughness&#x22;,&#x22;metalness&#x22;,&#x22;height&#x22;]">
  Which PBR maps to predict. Defaults to all five.
</ParamField>

<ParamField body="output_format" type="string" default="&#x22;png&#x22;">
  Output image format: jpeg, png, or webp.
</ParamField>

<ParamField body="seed" type="integer">
  Random seed for reproducible denoising.
</ParamField>

<ParamField body="sync_mode" type="boolean" default="false">
  If true, return images as data URIs instead of CDN URLs.
</ParamField>

Generated from the schema Router serves at `GET /v2/models/fal/patina/openapi.json`, the same document it validates a call against before the request reaches the provider.

### Output

Router does not publish an output schema for this model.

## Examples

### Input

```json theme={null}
{
  "image_url": "https://storage.googleapis.com/falserverless/gallery/patina-blog-hero-render.png"
}
```

## Before you ship

The SDKs create an `Idempotency-Key` and reuse it for automatic retries. For manual retries, reuse the original key. Router can hold the connection for up to 10 minutes.

When a request fails, Router sends an `X-Comfy-Error-Type` response header explaining why. A `422` means Router rejected the input before calling the provider. Download generated assets promptly because [result URLs can expire](/development/comfy-router/reference#result-assets).

<CardGroup cols={3}>
  <Card title="Headers" icon="list" href="/development/comfy-router/headers">
    Authentication, idempotency, request IDs, error buckets, retry pacing, spend limits.
  </Card>

  <Card title="Using the Router API" icon="code" href="/development/comfy-router/models">
    Model discovery, validation errors, retries, and billing.
  </Card>

  <Card title="Limitations" icon="triangle-exclamation" href="/development/comfy-router/limitations">
    What Router does not do today, and what to use instead.
  </Card>
</CardGroup>