Name: Face to Character API (FLUX Kontext Face-to-Many)
Brand: magicapi
SKU: api-magicapi-character-generation-api-flux-kontext-apps-face-to-many-kontext
Availability: InStock
Author: API Market

Shashank Agarwal

# 🧑‍🎨 Face to Character API (FLUX Kontext Face-to-Many)

## Overview
Face-to-Many Kontext is part of the FLUX Kontext apps collection. Its developer describes it as "Become a character, in style". You send a photo of a person in `input_image`, pick an artistic `style` and, if you like, a `persona`, and get back 1 to 10 images of that person as a character. You can keep the original outfit or background, choose the aspect ratio and pick PNG or JPG output.

## Features
- **Photo of a person in, character images out**: `input_image` (required) must be a jpeg, png, gif or webp file.
- **16 styles** with `style` (default `Random`): `Anime`, `Cartoon`, `Clay`, `Gothic`, `Graphic Novel`, `Lego`, `Memoji`, `Minecraft`, `Minimalist`, `Pixel Art`, `Random`, `Simpsons`, `Sketch`, `South Park`, `Toy`, `Watercolor`.
- **13 personas** with `persona` (default `None`): `Angel`, `Astronaut`, `Demon`, `Mage`, `Ninja`, `Na'vi`, `None`, `Random`, `Robot`, `Samurai`, `Vampire`, `Werewolf`, `Zombie`.
- **Several images per request**: `num_images` from 1 to 10 (default 1).
- **Keep parts of the photo**: set `preserve_outfit` or `preserve_background` to `true` (both default `false`).
- **Aspect ratio**: `match_input_image` (default), `1:1`, `16:9`, `9:16`, `4:3`, `3:4`, `3:2`, `2:3`, `4:5`, `5:4`, `21:9`, `9:21`, `2:1` or `1:2`.
- **Output format**: `png` (default) or `jpg`.
- **Safety and reproducibility**: `safety_tolerance` from 0 (most strict) to 2 (most permissive, and the default). 2 is currently the maximum allowed. Set `seed` for reproducible generation.

## Use Cases
1. **Avatars and profile pictures**: turn a portrait into a clay, anime, pixel art or cartoon version.
2. **Social and marketing content**: create themed character images for campaigns, posts and events.
3. **Games and community features**: let users see themselves as a ninja, robot or astronaut.
4. **Creative exploration**: try many style and persona combinations from one photo.

## Visual Examples
This is a real request sent through api.market and the file it returned.

### Example Input
- `input_image`: [input photo](https://blog.api.market/wp-content/uploads/2026/10/p-video-avatar-input-api-market.webp)
- `style`: `Clay`

All other fields were left at their defaults (`persona` `None`, `num_images` 1, `aspect_ratio` `match_input_image`).

### Example Output
![The person from the input photo as a clay figure in a yellow jacket, in front of a red neon sign](https://blog.api.market/wp-content/uploads/2026/10/face-to-many-kontext-output-api-market.webp)

The image shown is a resized WebP copy of the PNG file the request returned.

## Input Parameters
| Field | Type | Required | Default | Allowed values | Description |
| --- | --- | --- | --- | --- | --- |
| `input_image` | string | Yes |  | URL | Image of the person to transform. Must be jpeg, png, gif, or webp. |
| `style` | string | No | `Random` | `Anime`, `Cartoon`, `Clay`, `Gothic`, `Graphic Novel`, `Lego`, `Memoji`, `Minecraft`, `Minimalist`, `Pixel Art`, `Random`, `Simpsons`, `Sketch`, `South Park`, `Toy`, `Watercolor` | The artistic style to apply to the image |
| `persona` | string | No | `None` | `Angel`, `Astronaut`, `Demon`, `Mage`, `Ninja`, `Na'vi`, `None`, `Random`, `Robot`, `Samurai`, `Vampire`, `Werewolf`, `Zombie` | The persona to apply to the image |
| `num_images` | integer | No | `1` | 1 to 10 | The number of images to generate |
| `aspect_ratio` | string | No | `match_input_image` | `match_input_image`, `1:1`, `16:9`, `9:16`, `4:3`, `3:4`, `3:2`, `2:3`, `4:5`, `5:4`, `21:9`, `9:21`, `2:1`, `1:2` | Aspect ratio of the generated image. Use 'match_input_image' to match the aspect ratio of the input image. |
| `preserve_outfit` | boolean | No | `false` | `true` or `false` | Whether to preserve the outfit |
| `preserve_background` | boolean | No | `false` | `true` or `false` | Whether to preserve the background |
| `output_format` | string | No | `png` | `jpg`, `png` | Output format for the generated image |
| `safety_tolerance` | integer | No | `2` | 0 to 2 | Safety tolerance, 0 is most strict and 2 is most permissive. 2 is currently the maximum allowed. |
| `seed` | integer | No |  |  | Random seed. Set for reproducible generation |

### Output
`output` is an array of image URLs, one per generated image (`num_images`). Files are PNG by default, or JPG with `output_format` set to `jpg`.

## Pricing
- **Pay As You Go (PAYG) pricing**: you only pay for what you use.
- **Price**: $0.05 per API unit.
- **1 API unit = 1 output image.** A request is billed `num_images` units.
- **Examples**:
  - `num_images` 1 (the default, as in the example on this page): 1 unit, $0.05.
  - `num_images` 4: 4 units, $0.20.
  - `num_images` 10 (the maximum): 10 units, $0.50.
- Style, persona, aspect ratio and output format do not change the price.
- **Failed or cancelled predictions are not billed.**
- **GET requests to check prediction status** (GET /api/v1/magicapi/character-generation-api-flux-kontext-apps-face-to-many-kontext/predictions/{id}) are free and don't count toward API unit usage.
- **No monthly subscription fee.**

## API Documentation

### Base URL
All API requests go to: `https://prod.api.market/api/v1/magicapi/character-generation-api-flux-kontext-apps-face-to-many-kontext`

### Authentication
Send your api.market API key in the `x-api-market-key` header:
```
x-api-market-key: YOUR_API_MARKET_KEY
```

### Asynchronous Processing
**IMPORTANT**: This API is asynchronous. The flow is:
1. Send a POST request to `/predictions`. A successful request returns **201 Created** with a prediction `id` and a `status` of `starting` or `processing`. 201 means the request was accepted; it is not an error.
2. Poll GET `/predictions/{id}` with that ID.
3. Keep polling while `status` is `starting` or `processing`.
4. Stop when `status` is `succeeded` (read `output`), `failed` or `canceled` (read `error`).

A polling interval of 1 second and an overall timeout of 600 seconds (10 minutes) work well.

### Endpoints

#### Create a Prediction
```bash
curl -X POST "https://prod.api.market/api/v1/magicapi/character-generation-api-flux-kontext-apps-face-to-many-kontext/predictions" \
  -H "Content-Type: application/json" \
  -H "x-api-market-key: YOUR_API_MARKET_KEY" \
  -d '{
    "version": "e70dc4c85c82c3c195190c227b965a4093b2871d2071d997dbd509435d0b19b9",
    "input": {
      "input_image": "https://blog.api.market/wp-content/uploads/2026/10/p-video-avatar-input-api-market.webp",
      "style": "Clay"
    }
  }'
```

Response (201 Created):
```json
{
  "id": "ufawqhfynnddngldkgtslldrkq",
  "version": "e70dc4c85c82c3c195190c227b965a4093b2871d2071d997dbd509435d0b19b9",
  "status": "starting",
  "created_at": "2026-10-13T10:40:12.511Z"
}
```

#### Check Prediction Status
```bash
curl -X GET "https://prod.api.market/api/v1/magicapi/character-generation-api-flux-kontext-apps-face-to-many-kontext/predictions/ufawqhfynnddngldkgtslldrkq" \
  -H "x-api-market-key: YOUR_API_MARKET_KEY"
```

Response when the prediction has finished (200 OK):
```json
{
  "id": "ufawqhfynnddngldkgtslldrkq",
  "status": "succeeded",
  "output": [
    "https://blog.api.market/wp-content/uploads/2026/10/face-to-many-kontext-output-api-market.webp"
  ],
  "error": null,
  "created_at": "2026-10-13T10:40:12.511Z",
  "started_at": "2026-10-13T10:40:13.020Z",
  "completed_at": "2026-10-13T10:40:21.734Z"
}
```

### Status Codes
- **201 Created**: prediction created (POST `/predictions`). This is the normal success response.
- **200 OK**: prediction details returned (GET `/predictions/{id}`).
- **400 Bad Request**: invalid input, for example a missing `input_image`, a `style` or `persona` that is not in the list, or `num_images` outside 1 to 10.
- **401 Unauthorized**: missing or invalid API key.
- **404 Not Found**: no prediction with that ID.
- **429 Too Many Requests**: rate limit exceeded.
- **500 Internal Server Error** or **503 Service Unavailable**: temporary server problem; retry later.

## Rate Limits

All plans allow 10 requests per second. Requests above that return `429 Too Many Requests`; back off before retrying and honour any `Retry-After` header. Polling a prediction with GET is free but still counts toward the per-second limit, so poll every 1 to 5 seconds rather than in a tight loop.

## Error Handling
- Check the HTTP status code of every request and read the response body for the error message.
- A prediction can also end with `status` set to `failed`; the `error` field then explains why. Failed predictions are not billed.
- Retry 429, 500 and 503 responses with exponential backoff. Fix the input before retrying a 400.

## Implementation Guide

### JavaScript
```javascript
const apiKey = "YOUR_API_MARKET_KEY";
const baseUrl = "https://prod.api.market/api/v1/magicapi/character-generation-api-flux-kontext-apps-face-to-many-kontext";

async function createAndWaitForPrediction(input) {
  const response = await fetch(`${baseUrl}/predictions`, {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      "x-api-market-key": apiKey
    },
    body: JSON.stringify({ version: "e70dc4c85c82c3c195190c227b965a4093b2871d2071d997dbd509435d0b19b9", input })
  });

  if (response.status !== 201) {
    throw new Error(`API error: ${response.status} ${await response.text()}`);
  }

  const prediction = await response.json();
  return pollForResults(prediction.id);
}

const delay = (ms) => new Promise((resolve) => setTimeout(resolve, ms));

async function pollForResults(predictionId) {
  const maxTimeout = 600000;
  const pollInterval = 1000;
  const startTime = Date.now();

  while (Date.now() - startTime < maxTimeout) {
    const response = await fetch(`${baseUrl}/predictions/${predictionId}`, {
      headers: { "x-api-market-key": apiKey }
    });

    if (!response.ok) {
      throw new Error(`API error: ${response.status} ${await response.text()}`);
    }

    const prediction = await response.json();

    if (prediction.status === "succeeded") {
      return prediction.output;
    }

    if (prediction.status === "failed" || prediction.status === "canceled") {
      throw new Error(`Prediction ${prediction.status}: ${prediction.error || "Unknown error"}`);
    }

    await delay(pollInterval);
  }

  throw new Error("Prediction timed out after 10 minutes");
}

createAndWaitForPrediction({
  "input_image": "https://blog.api.market/wp-content/uploads/2026/10/p-video-avatar-input-api-market.webp",
  "style": "Clay"
}).then((output) => console.log(output));
```

### Python
```python
import time
import requests

API_KEY = "YOUR_API_MARKET_KEY"
BASE_URL = "https://prod.api.market/api/v1/magicapi/character-generation-api-flux-kontext-apps-face-to-many-kontext"

def create_and_wait_for_prediction(input_data):
    headers = {"Content-Type": "application/json", "x-api-market-key": API_KEY}
    response = requests.post(
        f"{BASE_URL}/predictions",
        headers=headers,
        json={"version": "e70dc4c85c82c3c195190c227b965a4093b2871d2071d997dbd509435d0b19b9", "input": input_data},
    )

    if response.status_code != 201:
        raise Exception(f"API error: {response.status_code} {response.text}")

    return poll_for_results(response.json()["id"])

def poll_for_results(prediction_id):
    max_timeout = 600
    poll_interval = 1
    headers = {"x-api-market-key": API_KEY}
    start_time = time.time()

    while time.time() - start_time < max_timeout:
        response = requests.get(f"{BASE_URL}/predictions/{prediction_id}", headers=headers)

        if response.status_code != 200:
            raise Exception(f"API error: {response.status_code} {response.text}")

        prediction = response.json()

        if prediction["status"] == "succeeded":
            return prediction["output"]

        if prediction["status"] in ("failed", "canceled"):
            raise Exception(f"Prediction {prediction['status']}: {prediction.get('error') or 'Unknown error'}")

        time.sleep(poll_interval)

    raise Exception("Prediction timed out after 10 minutes")

print(create_and_wait_for_prediction({
  "input_image": "https://blog.api.market/wp-content/uploads/2026/10/p-video-avatar-input-api-market.webp",
  "style": "Clay"
}))
```

## FAQ
- **What kind of photo works?**
  - A photo of a person as a jpeg, png, gif or webp file, passed as a URL in `input_image`.
- **What is the difference between style and persona?**
  - `style` sets the artistic look (for example `Clay` or `Anime`). `persona` sets the character the person becomes (for example `Astronaut` or `Samurai`). The default persona is `None`.
- **How many images can I get per request?**
  - 1 to 10 with `num_images`. Each image is billed as 1 unit ($0.05).
- **Can I keep the original clothes or background?**
  - Yes. Set `preserve_outfit` or `preserve_background` to `true`.
- **Is the 201 response from POST an error?**
  - No. 201 Created means the prediction was accepted. Poll GET `/predictions/{id}` until `status` is `succeeded`, `failed` or `canceled`.
- **What if my prediction fails?**
  - Failed predictions are not billed. Read the `error` field, adjust the input and try again.

## Contact Us

If you have any questions or need assistance, you can reach out to us through the embedded chat on the bottom right corner of the page or send an email to hello@magicapi.com.


Face to character API with FLUX Kontext: turn a portrait into Clay, Anime or Pixel Art styles, with optional personas. Up to 10 images, $0.05 per image.