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Flux 2 Flex: texto a imagen con control de muestreo | RunComfy

blackforestlabs/flux-2/flex/text-to-image

Convierte texto en imágenes y controla tamaño, ampliación del prompt, muestreo y formato.

Índice

1. Primeros pasos2. Autenticación3. Referencia de la APIEnviar una solicitudEstado de la solicitudObtener resultadosCancelar solicitud4. Archivos de entradaArchivo alojado (URL)5. EsquemaEsquema de entradaEsquema de salida

1. Primeros pasos

Usa la API de RunComfy para ejecutar blackforestlabs/flux-2/flex/text-to-image. Para entradas y salidas admitidas, consulta el esquema.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/blackforestlabs/flux-2/flex/text-to-image \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "High-resolution iPhone photograph tightly composed to capture two fashionable women standing mid-distance from a pristine white gallery wall adorned with a large whimsical modern artwork. The scene shows a candid moment mid-discussion, their relaxed postures conveying natural engagement with the art and each other. One woman, seen from a slight side angle at three-quarter rear view, wears a dark gray corset-style top paired with relaxed black jeans that gently crease at the ankle, her arms loosely at her sides. Her hair, softly catching the ambient light, frames her face as she directs her gaze thoughtfully toward the painting. The other woman, captured from behind and slightly to the side, dons a sleek black dress with subtle texture, complemented by a delicate gingham ribbon tied neatly in her hair, which cascades softly over her shoulders. Her hands rest casually by her sides as she leans slightly forward, visibly engaged in the conversation. Soft, diffuse ambient gallery lighting gently sculpts fabric textures—the corset's structured sheen and the dress's smooth flow—while creating a natural compression between figure and whimsical artwork. The expansive white wall behind them provides a clean, graphic background, establishing a calm horizontal rhythm that anchors this intimate, fashion-forward moment of contemporary art appreciation within a serene minimalist museum setting."
  }'

2. Autenticación

Define la variable de entorno YOUR_API_TOKEN con tu clave API (gestión en Perfil) e incluye en cada solicitud un token Bearer en la cabecera Authorization : Authorization: Bearer $YOUR_API_TOKEN.

3. Referencia de la API

Enviar una solicitud

Envía un trabajo de generación asíncrono y recibe de inmediato un request_id y URLs para consultar estado, obtener resultados y cancelar.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/blackforestlabs/flux-2/flex/text-to-image \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "High-resolution iPhone photograph tightly composed to capture two fashionable women standing mid-distance from a pristine white gallery wall adorned with a large whimsical modern artwork. The scene shows a candid moment mid-discussion, their relaxed postures conveying natural engagement with the art and each other. One woman, seen from a slight side angle at three-quarter rear view, wears a dark gray corset-style top paired with relaxed black jeans that gently crease at the ankle, her arms loosely at her sides. Her hair, softly catching the ambient light, frames her face as she directs her gaze thoughtfully toward the painting. The other woman, captured from behind and slightly to the side, dons a sleek black dress with subtle texture, complemented by a delicate gingham ribbon tied neatly in her hair, which cascades softly over her shoulders. Her hands rest casually by her sides as she leans slightly forward, visibly engaged in the conversation. Soft, diffuse ambient gallery lighting gently sculpts fabric textures—the corset's structured sheen and the dress's smooth flow—while creating a natural compression between figure and whimsical artwork. The expansive white wall behind them provides a clean, graphic background, establishing a calm horizontal rhythm that anchors this intimate, fashion-forward moment of contemporary art appreciation within a serene minimalist museum setting."
  }'

Estado de la solicitud

Obtiene el estado actual de un request_id ("in_queue", "in_progress", "completed" o "cancelled").

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/status \
  --header "Authorization: Bearer <token>"

Obtener resultados

Obtiene las salidas finales y metadatos del request_id; si el trabajo no ha terminado, la respuesta devuelve el estado actual para seguir haciendo polling.

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/result \
  --header "Authorization: Bearer <token>"

Cancelar solicitud

Cancela un trabajo en cola por request_id; los trabajos en curso no se pueden cancelar.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/cancel \
  --header "Authorization: Bearer <token>"

4. Archivos de entrada

Archivo alojado (URL)

Proporciona una URL HTTPS públicamente accesible. El host debe permitir peticiones del servidor (sin login/cookies), sin rate limit agresivo ni bloqueo de bots. Recomendado: imágenes ≤ 50 MB (~4K), vídeos ≤ 100 MB (~2–5 min a 720p). Para activos privados, URLs estables o firmadas.

5. Esquema

Esquema de entrada

{
  "type": "object",
  "title": "Esquema de entrada",
  "required": [
    "prompt"
  ],
  "properties": {
    "prompt": {
      "title": "Prompt",
      "description": "Descripción textual de la imagen que se va a generar.",
      "type": "string",
      "default": "High-resolution iPhone photograph tightly composed to capture two fashionable women standing mid-distance from a pristine white gallery wall adorned with a large whimsical modern artwork. The scene shows a candid moment mid-discussion, their relaxed postures conveying natural engagement with the art and each other. One woman, seen from a slight side angle at three-quarter rear view, wears a dark gray corset-style top paired with relaxed black jeans that gently crease at the ankle, her arms loosely at her sides. Her hair, softly catching the ambient light, frames her face as she directs her gaze thoughtfully toward the painting. The other woman, captured from behind and slightly to the side, dons a sleek black dress with subtle texture, complemented by a delicate gingham ribbon tied neatly in her hair, which cascades softly over her shoulders. Her hands rest casually by her sides as she leans slightly forward, visibly engaged in the conversation. Soft, diffuse ambient gallery lighting gently sculpts fabric textures—the corset's structured sheen and the dress's smooth flow—while creating a natural compression between figure and whimsical artwork. The expansive white wall behind them provides a clean, graphic background, establishing a calm horizontal rhythm that anchors this intimate, fashion-forward moment of contemporary art appreciation within a serene minimalist museum setting."
    },
    "image_size": {
      "title": "Tamaño de imagen",
      "description": "Uno de los seis tamaños disponibles.",
      "type": "string",
      "enum": [
        "square_hd",
        "square",
        "portrait_4_3",
        "portrait_16_9",
        "landscape_4_3",
        "landscape_16_9"
      ],
      "default": "landscape_4_3"
    },
    "output_format": {
      "title": "Formato de salida",
      "description": "Formato de archivo de la imagen generada.",
      "type": "string",
      "enum": [
        "jpeg",
        "png"
      ],
      "default": "jpeg"
    },
    "guidance_scale": {
      "title": "Escala de guía",
      "description": "Intensidad con la que la generación sigue el prompt (de 1,5 a 10).",
      "type": "float",
      "minimum": 1.5,
      "maximum": 10,
      "default": 3.5
    },
    "seed": {
      "title": "Semilla",
      "description": "Semilla de la generación; el valor predeterminado es 0.",
      "type": "integer",
      "default": 0
    },
    "num_inference_steps": {
      "title": "Número de pasos de inferencia",
      "description": "Número de pasos de inferencia (de 2 a 50).",
      "type": "integer",
      "minimum": 2,
      "maximum": 50,
      "default": 28
    },
    "enable_prompt_expansion": {
      "title": "Ampliación del prompt",
      "description": "Cuando está activa, amplía el prompt con el conocimiento del modelo.",
      "type": "boolean",
      "default": true
    }
  }
}

Esquema de salida

{
  "output": {
    "type": "object",
    "properties": {
      "image": {
        "type": "string",
        "format": "uri",
        "description": "URL de una sola imagen"
      },
      "video": {
        "type": "string",
        "format": "uri",
        "description": "URL de un solo vídeo"
      },
      "images": {
        "type": "array",
        "description": "varias URLs de imagen",
        "items": {
          "type": "string",
          "format": "uri"
        }
      },
      "videos": {
        "type": "array",
        "description": "varias URLs de vídeo",
        "items": {
          "type": "string",
          "format": "uri"
        }
      }
    }
  }
}
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