---
title: "Server-side bank statement data extraction - AI-powered"
canonical_url: "https://www.nutrient.io/guides/document-engine/extraction/bank-statements/"
md_url: "https://www.nutrient.io/guides/document-engine/extraction/bank-statements.md"
last_updated: "2026-06-08T19:21:59.160Z"
description: "Learn to extract IBANs and account numbers from bank statements using Nutrient’s Document Engine. Master key-value pair extraction with our guide."
---

# Extract data from bank statements

This guide explains how to extract key-value pairs (KVPs) from bank statements using Document Engine. For example, this enables you to extract IBANs or account numbers. For more information, refer to the guide on [how key-value pair extraction works](https://www.nutrient.io/guides/document-engine/extraction/key-value-pairs/how-it-works.md).

## Sending the request to extract data

To extract key-value pairs from a bank statement, post a multipart request to the [`/api/build` endpoint](https://www.nutrient.io/api/reference/document-engine/upstream/#tag/Document-Editing/operation/build-document). In the instructions, specify the following output parameters:

- `type` specifies the output type. Set this to `json-content`.

- `keyValuePairs` is a Boolean value that determines whether to extract key-value pairs.

- `language` specifies the language used for recognizing text with optical character recognition (OCR). Sometimes, text is stored in a PDF or an image in a way that makes it so you cannot search or copy it. Nutrient’s OCR engine allows you to recognize text and save it in a separate file where you can both search and copy and paste the text. For more information, refer to the [list of supported languages](https://www.nutrient.io/guides/document-engine/ocr/language-support.md).

### SHELL

```shell

curl -X POST http://localhost:5000/api/build \
  -H "Authorization: Token token=<API token>" \
  -F document=@/path/to/example-document.pdf \
  -F instructions='{
  "parts": [
    {
      "file": "document"
    }
  ],
  "output": {
    "type": "json-content",
    "keyValuePairs": true,
    "language": "english"
  }
}' \
  -o result.pdf

```

### HTTP

```http

POST /api/build HTTP/1.1
Content-Type: multipart/form-data; boundary=customboundary
Authorization: Token token=<API token>

--customboundary
Content-Disposition: form-data; name="document"; filename="example-document.pdf"
Content-Type: application/pdf

<PDF data>
--customboundary
Content-Disposition: form-data; name="instructions"
Content-Type: application/json

{
  "parts": [
    {
      "file": "document"
    }
  ],
  "output": {
    "type": "json-content",
    "keyValuePairs": true,
    "language": "english"
  }
}
--customboundary--

```

For more information on the Build instructions, refer to the [API Reference](https://www.nutrient.io/api/reference/document-engine/upstream/#tag/Build-API).

## Example data extraction response

```json

{
  "pages": [
    {
      "pageIndex": 0,
      "keyValuePairs": [
        {
          "confidence": 95.4,
          "key": {
            "bbox": {
              "left": 0,
              "top": 0,
              "width": 100,
              "height": 100
            },
            "content": "IBAN"
          },
          "value": {
            "bbox": {
              "left": 0,
              "top": 0,
              "width": 100,
              "height": 100
            },
            "content": "FR7611808009101234567890147",
            "dataType": "String"
          }
        }
      ]
    }
  ]
}

```
---

## Related pages

- [Extract text, tables, and more from PDFs](/guides/document-engine/extraction/extract-data.md)
- [Extract tables from PDFs and images](/guides/document-engine/extraction/tables.md)
- [PDF data extraction server](/guides/document-engine/extraction.md)
- [Invoices](/guides/document-engine/extraction/invoices.md)
- [Extract text from PDFs and images](/guides/document-engine/extraction/text.md)