API REFERENCE

Generate Image

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POST/api/content/image

Generate an image from a text prompt. Pass image_urls to edit those images with the prompt instead of generating a new one. Returns the image URL.

Authentication

x-api-key in header

bearerAuth bearer

Request

cURL

curl --request POST \
  --url 'https://api.recoupable.dev/api/content/image' \
  --header 'x-api-key: YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
  "prompt": "string",
  "image_urls": [
    "string"
  ],
  "num_images": 1,
  "aspect_ratio": "21:9",
  "output_format": "webp",
  "sync_mode": false
}'

Request body required

Image generation parameters

application/json

promptstring

Text prompt used to generate or edit the image

image_urlsarray<string>

Reference images to edit (1-10 HTTP(S) URLs). When provided, edits these images with prompt instead of generating a new one.

minItems: 1 · maxItems: 10

Item properties

string

num_imagesinteger

Number of images to generate (1-4)

Default: 1

minimum: 1 · maximum: 4

aspect_ratiostring · enum

Output aspect ratio. If omitted, the model chooses automatically based on the request.

Values: "21:9", "16:9", "4:3", "3:2", "1:1", "2:3", "3:4", "9:16", "9:21"

output_formatstring · enum

Format of the generated image

Values: "jpeg", "png", "webp"

Default: "webp"

sync_modeboolean

If true, the image is returned as a data URI and is not persisted in the request history

Default: false

Responses

200Image generated successfully

application/json

imageUrlstringrequired

URL of the first generated image

format: uri

imagesarray<string>required

URLs of all generated images. Contains one element when num_images is 1.

Item properties

string

400Validation failed — invalid or missing request body fields

application/json

errorstringrequired

Error message describing what went wrong

401Unauthorized — invalid or missing API key

application/json

errorstringrequired

Error message describing what went wrong

402Insufficient credits. Charged per generated image at the pinned model's rate ($0.01 per image). A free-tier account without sufficient credits receives a 402.

application/json

errorstringrequired

Error message describing what went wrong

500Internal server error

application/json

errorstringrequired

Error message describing what went wrong

Full specification

Download the OpenAPI file for complete schemas, constraints, and examples.

Download content.json

View operation source

json

{
  "description": "Generate an image from a text prompt. Pass `image_urls` to edit those images with the prompt instead of generating a new one. Returns the image URL.",
  "security": [
    {
      "apiKeyAuth": []
    },
    {
      "bearerAuth": []
    }
  ],
  "requestBody": {
    "description": "Image generation parameters",
    "required": true,
    "content": {
      "application/json": {
        "schema": {
          "$ref": "#/components/schemas/ContentCreateImageRequest"
        }
      }
    }
  },
  "responses": {
    "200": {
      "description": "Image generated successfully",
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/ContentCreateImageResponse"
          }
        }
      }
    },
    "400": {
      "description": "Validation failed — invalid or missing request body fields",
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/ContentErrorResponse"
          }
        }
      }
    },
    "401": {
      "description": "Unauthorized — invalid or missing API key",
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/ContentErrorResponse"
          }
        }
      }
    },
    "402": {
      "description": "Insufficient credits. Charged per generated image at the pinned model's rate ($0.01 per image). A free-tier account without sufficient credits receives a 402.",
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/ContentErrorResponse"
          }
        }
      }
    },
    "500": {
      "description": "Internal server error",
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/ContentErrorResponse"
          }
        }
      }
    }
  }
}