Skip to main content
POST
/
api
/
v1
/
extract-image
Extract text from image
curl --request POST \
  --url https://app.dumplingai.com/api/v1/extract-image \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "inputMethod": "url",
  "images": [
    "https://example.com/receipt.jpg",
    "https://example.com/menu.png"
  ],
  "prompt": "Summarize the totals and highlight any discounts.",
  "jsonMode": true
}'
{
  "results": "<string>",
  "prompt": "<string>",
  "imageCount": 123,
  "creditUsage": 123
}

​
Extract Image API Documentation

​
Description

This endpoint extracts structured data from image files based on a user-defined prompt. It supports input via URL or base64-encoded image content and uses vision-capable Large Language Models (LLMs) to interpret and extract relevant information from the images.

​
Endpoint

POST https://app.dumplingai.com/api/v1/extract-image

​
Headers

  • Content-Type: application/json
  • Authorization: Bearer <API_KEY> (required)

​
Request Body

{
  "inputMethod": "string", // Required. Either "url" or "base64".
  "images": ["string"], // Required. Array of URLs or base64-encoded image contents.
  "prompt": "string", // Required. The prompt describing the data to extract.
  "jsonMode": boolean // Optional. Whether to return the result in JSON format. Default: false.
}

​
Responses

​
Success (200)

Returns the extracted data based on the provided prompt, along with additional information. 
{
  "results": "string", // Extracted data based on the prompt
  "prompt": "string", // The original prompt used for extraction
  "imageCount": number, // Number of images processed
  "creditUsage": number // Total credits used for this request
}
  • Content-Type: application/json
  • X-RateLimit-Limit: The rate limit for the user.
  • X-RateLimit-Remaining: The remaining number of requests for the user.

​
Bad Request (400)

Returned if the request is invalid or the total file size exceeds the limit. 
{
  "error": "Error message describing the issue"
}

​
Unauthorized (401)

Returned if the API key is invalid or missing. 
{
  "error": "Invalid or missing Authorization header"
}

​
Internal Server Error (500)

Returned if there’s an error during the image extraction process. 
{
  "error": "Failed to extract image data: [error details]"
}

​
Example Request

curl -X POST https://app.dumplingai.com/api/v1/extract-image \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{
  "inputMethod": "url",
  "images": ["https://example.com/sample-image.jpg"],
  "prompt": "Describe the main elements in this image.",
  "jsonMode": false
}'

​
Notes

  • The maximum total file size for all images combined is 100MB.
  • The maximum file size for a single image is 20MB.
  • The maximum number of images that can be processed in a single request is 3000.
  • The maximum output is 8,192 tokens.
  • Credit usage:
    • Base cost: 10 credits
    • Additional 1 credit per image processed
  • The total credit usage is returned in the response as creditUsage.
  • If using the URL method, ensure the image is publicly accessible.
  • The jsonMode parameter determines whether the output is formatted as JSON (true) or plain text (false).
  • Supported image formats: PNG, JPEG, WebP, HEIC, HEIF. Other formats will be automatically converted to PNG.
  • Temporary files are created during processing and are deleted after use.
  • You can get a list of supported image formats by calling:
GET /api/v1/extract-image

​
Rate Limiting

Rate limit headers (X-RateLimit-Limit and X-RateLimit-Remaining) are included in the response to indicate the user’s current rate limit status.

​
Error Handling

  • If the required parameters (images or prompt) are missing, a 400 Bad Request error is returned.
  • If the total file size exceeds 100MB, a 400 Bad Request error is returned.
  • If there’s an error during extraction, a 500 Internal Server Error is returned with details about the failure.

​
Security and Privacy

  • Uploaded images are temporarily stored and then deleted after processing.
  • The endpoint uses the Gemini 1.5 Flash model for image analysis and data extraction.

Authorizations

​
Authorization
string
header
required

Bearer authentication header of the form Bearer <token>, where <token> is your auth token.

Body

application/json
​
inputMethod
enum<string>
required

Indicates whether binary content is supplied via URL or base64-encoded string.

Available options:
url,
base64
​
images
string[]
required

Array of image URLs or base64-encoded strings to analyze.

Minimum length: 1
​
prompt
string
required

Instructions that describe the insights to extract from the images.

​
jsonMode
boolean
default:false

When true, requests the model to respond with JSON-formatted output.

​
requestSource
enum<string>

Optional identifier describing where the API request originated.

Available options:
API,
WEB,
MAKE_DOT_COM,
ZAPIER,
N8N,
PLAYGROUND,
DEFAULT_AUTOMATION,
AGENT_PREVIEW,
AGENT_LIVE,
AUTOPILOT,
STUDIO

Response

OCR results returned.

​
results
string
required

Model output returned from the extraction prompt.

​
prompt
string
required
​
imageCount
integer
required

Number of images processed.

​
creditUsage
integer
required

Credits consumed while processing the request.