> ## Documentation Index
> Fetch the complete documentation index at: https://docs.comfy.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Use FLUX Pro 1.0 Canny with Comfy Router

> Call bfl/flux-pro-1.0-canny through Comfy Router: endpoint, request shape and the response Router returns.

API Reference for `bfl/flux-pro-1.0-canny`, served by Comfy Router from Black Forest Labs.

## 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:** `bfl/flux-pro-1.0-canny`

**Endpoint:** `POST https://api.comfy.org/v2/models/bfl/flux-pro-1.0-canny`

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

  # Reads COMFY_API_KEY from the environment. Each call sends a fresh
  # Idempotency-Key and waits up to 10 minutes for the finished result.
  with Comfy() as client:
      result = client.models.run(
          "bfl/flux-pro-1.0-canny",
          {
              # Request fields are the provider's own — see Input below.
          },
      )

  print(result)
  ```

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

  // Reads COMFY_API_KEY from the environment. Each call sends a fresh
  // Idempotency-Key and waits up to 10 minutes for the finished result.
  const { data } = await comfy.models.run("bfl/flux-pro-1.0-canny", {
    // Request fields are the provider's own — see Input below.
  });

  console.log(data);
  ```

  ```bash cURL theme={null}
  # Request fields are the provider's own — see Input below.
  curl https://api.comfy.org/v2/models/bfl/flux-pro-1.0-canny \
    -H "X-API-Key: $COMFY_API_KEY" \
    -H "Idempotency-Key: $(uuidgen)" \
    -H "Content-Type: application/json" \
    -d '{}'
  ```
</CodeGroup>

## Schema

### Input

<Note>
  Router has not published an authored input schema for this model yet: `GET /v2/models/bfl/flux-pro-1.0-canny/openapi.json` returns an open object with `x-comfy-input-schema-authored: false`. Router forwards the body to Black Forest Labs unchanged, so [Black Forest Labs's own API reference](https://docs.bfl.ai/) is authoritative for the request fields, and nothing is validated server side.
</Note>

### Output

<ResponseField name="cost" type="number">
  Provider-reported cost in credits, populated once the task is Ready.

  Format: `float`
</ResponseField>

<ResponseField name="id" type="string" required>
  BFL task identifier.
</ResponseField>

<ResponseField name="progress" type="number">
  Optional generation progress reported by BFL.

  Range: `0` to `1`

  Format: `float`
</ResponseField>

<ResponseField name="result" type="object" required>
  The finished generation. Not nullable here: this component's `required` entry is a promise that a `200` carries the result, and a nullable `result` would reduce it to a key-presence check.
</ResponseField>

<ResponseField name="result.cost" type="number">
  Provider-reported cost of the generation. This is BFL's number, not the Comfy charge.

  Format: `double`
</ResponseField>

<ResponseField name="result.duration" type="number">
  Provider-reported generation duration in seconds.

  Format: `double`
</ResponseField>

<ResponseField name="result.end_time" type="number">
  Provider-reported completion time of the generation, in seconds since the Unix epoch. `double` for the same reason as `start_time`.

  Format: `double`
</ResponseField>

<ResponseField name="result.prompt" type="string">
  The prompt the generation actually ran, after any prompt upsampling.
</ResponseField>

<ResponseField name="result.sample" type="string (uri)">
  Signed URL for the generated asset. Router re-hosts the asset onto Comfy storage and rewrites this field, so it is normally a Comfy-hosted URL valid for up to 24 hours - signed for 24 hours when minted, and replayed from a 23-hour memo, so a later poll can hand back one with as little as an hour left; a leaf whose re-host could not be performed keeps BFL's own short-lived delivery URL instead - roughly two hours for video, roughly ten minutes for images. Either way the link expires, so download the asset rather than storing the URL.

  Format: `uri`
</ResponseField>

<ResponseField name="result.seed" type="integer">
  The seed the generation used, whether supplied or chosen by the provider. Declared `int64` because BFL returns seeds above 2^31 (e.g. 2784347701), which an unformatted `integer` generates as a 32-bit field in many SDK generators.

  Format: `int64`
</ResponseField>

<ResponseField name="result.start_time" type="number">
  Provider-reported start time of the generation, in seconds since the Unix epoch. `double`, not `float`: float32 spacing near a present-day epoch value is \~128 seconds, which collapses a whole generation's span to a single decoded value.

  Format: `double`
</ResponseField>

<ResponseField name="status" type="string" required>
  Task status: Pending, Reasoning, Generating, Ready, Request Moderated, Content Moderated, Error, or Task not found.
</ResponseField>

## Examples

### Output

```json theme={null}
{
  "cost": null,
  "id": "b2e0c1a4-0f2f-4a55-9f2e-2f9a1c0d4e77",
  "progress": null,
  "result": {
    "cost": null,
    "duration": 3.4,
    "end_time": 1767225603.4,
    "prompt": "A watercolor painting of a lighthouse at dawn, soft light on the water",
    "sample": "https://example.invalid/bfl/flux-pro-1.1/sample.png",
    "seed": 2784347701,
    "start_time": 1767225600
  },
  "status": "Ready"
}
```

## Before you ship

The snippets above are the shortest working call. Three things are the same for every model and are documented once on the [Comfy Router headers](/development/comfy-router/headers) page: send an `Idempotency-Key` on every paid call and reuse it when you retry, expect the connection to be held up to Router's 10 minute deadline, and keep `X-Comfy-Request-Id` from every response. The SDKs do all three for you; the cURL tab does none of them. On failure, `X-Comfy-Error-Type` names the bucket, and a `422` means the body failed the model's schema and was never billed.

<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="Quick Start" icon="rocket" href="/development/comfy-router/quickstart">
    Typed error handling in Python and TypeScript, reading the 422, walking the catalog.
  </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>