# List invoice adjustments

GET https://api.letsdeel.com/rest/v2/invoice-adjustments

Retrieve invoice adjustments. You can filter the list by providing additional parameters e.g. contract_id, contract_type etc.
 **Token scopes**: `invoice-adjustments:read`

Reference: https://developer.deel.com/api/endpoints/invoice-adjustments/get-invoice-adjustments

## OpenAPI Specification

```yaml
openapi: 3.1.0
info:
  title: Deel HRIS SCIM API
  version: 1.0.0
paths:
  /invoice-adjustments:
    get:
      operationId: get-invoice-adjustments
      summary: List invoice adjustments
      description: >-
        Retrieve invoice adjustments. You can filter the list by providing
        additional parameters e.g. contract_id, contract_type etc.
         **Token scopes**: `invoice-adjustments:read`
      tags:
        - subpackage_invoiceAdjustments
      parameters:
        - name: contract_id
          in: query
          description: Id of an Deel contract.
          required: false
          schema:
            type: string
        - name: contract_types
          in: query
          description: types of contracts to filter
          required: false
          schema:
            $ref: '#/components/schemas/InvoiceAdjustmentsGetParametersContractTypes'
        - name: types
          in: query
          description: types of invoice adjustments to filter
          required: false
          schema:
            $ref: '#/components/schemas/InvoiceAdjustmentsGetParametersTypes'
        - name: statuses
          in: query
          description: statuses of invoice adjustment to filter
          required: false
          schema:
            $ref: '#/components/schemas/InvoiceAdjustmentsGetParametersStatuses'
        - name: invoice_id
          in: query
          description: ID of an existing invoice
          required: false
          schema:
            type: string
        - name: reporter_id
          in: query
          description: ID of an existing profile
          required: false
          schema:
            type: string
            format: uuid
        - name: date_from
          in: query
          description: >-
            To get invoice adjustments submitted on or after given start date
            (inclusive). Short date in format ISO-8601 (YYYY-MM-DD). For
            example: 2022-12-31.
          required: false
          schema:
            type: string
            format: date
        - name: date_to
          in: query
          description: >-
            To get invoice adjustments submitted before given end date (excludes
            records submitted on this date). Short date in format ISO-8601
            (YYYY-MM-DD). For example: 2022-12-31.
          required: false
          schema:
            type: string
            format: date
        - name: limit
          in: query
          description: >-
            Return a page of results with given number of records; NOTE:
            technically ALL query parameters are strings or array of strings
          required: false
          schema:
            type: string
        - name: offset
          in: query
          description: >-
            Return a page of results after given index of row; NOTE: technically
            ALL query parameters are strings or array of strings
          required: false
          schema:
            type: string
        - name: Authorization
          in: header
          description: >
            ## Authentication

            The Deel API uses bearer tokens to authenticate requests. All API
            calls must be made over HTTPS — calls over plain HTTP or without
            authentication will fail.


            ```curl

            curl -X GET 'https://api.letsdeel.com/rest/v2/contracts' \
              -H 'Authorization: Bearer YOUR-TOKEN-HERE'
            ```


            [Learn more about authentication](/api/authentication)
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Successful operation.
          content:
            application/json:
              schema:
                $ref: >-
                  #/components/schemas/invoice-adjustments_getInvoiceAdjustments_Response_200
        '400':
          description: Bad Request
          content:
            application/json:
              schema:
                $ref: >-
                  #/components/schemas/ListInvoiceAdjustments-v2026-01-01RequestBadRequestError
        '401':
          description: Operation failed.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorContainer'
        '403':
          description: Operation failed.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorContainer'
        '404':
          description: Operation failed.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorContainer'
        '500':
          description: Operation failed.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiErrorContainer'
servers:
  - url: https://api.letsdeel.com/rest/v2
  - url: https://api-staging.letsdeel.com/rest/v2
components:
  schemas:
    InvoiceAdjustmentsGetParametersContractTypesSchemaOneOf0Items:
      type: string
      enum:
        - ongoing_time_based
        - pay_as_you_go_time_based
        - payg_milestones
        - payg_tasks
      description: Type of a contract
      title: InvoiceAdjustmentsGetParametersContractTypesSchemaOneOf0Items
    InvoiceAdjustmentsGetParametersContractTypes0:
      type: array
      items:
        $ref: >-
          #/components/schemas/InvoiceAdjustmentsGetParametersContractTypesSchemaOneOf0Items
      description: List of contract types
      title: InvoiceAdjustmentsGetParametersContractTypes0
    InvoiceAdjustmentsGetParametersContractTypes1:
      type: string
      enum:
        - ongoing_time_based
        - pay_as_you_go_time_based
        - payg_milestones
        - payg_tasks
      title: InvoiceAdjustmentsGetParametersContractTypes1
    InvoiceAdjustmentsGetParametersContractTypes:
      oneOf:
        - $ref: '#/components/schemas/InvoiceAdjustmentsGetParametersContractTypes0'
        - $ref: '#/components/schemas/InvoiceAdjustmentsGetParametersContractTypes1'
      title: InvoiceAdjustmentsGetParametersContractTypes
    InvoiceAdjustmentsGetParametersTypesSchemaOneOf0Items:
      type: string
      enum:
        - accrued_holiday
        - additional_fee
        - allowance
        - bonus
        - commission
        - deduction
        - deposit
        - deposit_refund
        - employer_cost
        - expense
        - health_allowance
        - health_benefit
        - health_insurance_fee
        - legal_fee
        - management_fee
        - milestone
        - offcycle
        - other
        - overtime
        - pension
        - pro_rata
        - setup_fee
        - severance
        - shield_service
        - signing_bonus
        - signing_bonus_employer_cost
        - refund
        - task
        - time_off
        - vat
        - withholding_tax
        - work
      description: Type of invoice adjustment.
      title: InvoiceAdjustmentsGetParametersTypesSchemaOneOf0Items
    InvoiceAdjustmentsGetParametersTypes0:
      type: array
      items:
        $ref: >-
          #/components/schemas/InvoiceAdjustmentsGetParametersTypesSchemaOneOf0Items
      title: InvoiceAdjustmentsGetParametersTypes0
    InvoiceAdjustmentsGetParametersTypes1:
      type: string
      enum:
        - accrued_holiday
        - additional_fee
        - allowance
        - bonus
        - commission
        - deduction
        - deposit
        - deposit_refund
        - employer_cost
        - expense
        - health_allowance
        - health_benefit
        - health_insurance_fee
        - legal_fee
        - management_fee
        - milestone
        - offcycle
        - other
        - overtime
        - pension
        - pro_rata
        - setup_fee
        - severance
        - shield_service
        - signing_bonus
        - signing_bonus_employer_cost
        - refund
        - task
        - time_off
        - vat
        - withholding_tax
        - work
      title: InvoiceAdjustmentsGetParametersTypes1
    InvoiceAdjustmentsGetParametersTypes:
      oneOf:
        - $ref: '#/components/schemas/InvoiceAdjustmentsGetParametersTypes0'
        - $ref: '#/components/schemas/InvoiceAdjustmentsGetParametersTypes1'
      title: InvoiceAdjustmentsGetParametersTypes
    InvoiceAdjustmentsGetParametersStatusesSchemaOneOf0Items:
      type: string
      enum:
        - approved
        - declined
        - not_payable
        - paid
        - pending
        - processing
      description: status of invoice adjustment
      title: InvoiceAdjustmentsGetParametersStatusesSchemaOneOf0Items
    InvoiceAdjustmentsGetParametersStatuses0:
      type: array
      items:
        $ref: >-
          #/components/schemas/InvoiceAdjustmentsGetParametersStatusesSchemaOneOf0Items
      title: InvoiceAdjustmentsGetParametersStatuses0
    InvoiceAdjustmentsGetParametersStatuses1:
      type: string
      enum:
        - approved
        - declined
        - not_payable
        - paid
        - pending
        - processing
      title: InvoiceAdjustmentsGetParametersStatuses1
    InvoiceAdjustmentsGetParametersStatuses:
      oneOf:
        - $ref: '#/components/schemas/InvoiceAdjustmentsGetParametersStatuses0'
        - $ref: '#/components/schemas/InvoiceAdjustmentsGetParametersStatuses1'
      title: InvoiceAdjustmentsGetParametersStatuses
    InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsType:
      type: string
      enum:
        - accrued_holiday
        - additional_fee
        - allowance
        - bonus
        - commission
        - deduction
        - deposit
        - deposit_refund
        - employer_cost
        - expense
        - health_allowance
        - health_benefit
        - health_insurance_fee
        - legal_fee
        - management_fee
        - milestone
        - offcycle
        - other
        - overtime
        - pension
        - pro_rata
        - setup_fee
        - severance
        - shield_service
        - signing_bonus
        - signing_bonus_employer_cost
        - refund
        - task
        - time_off
        - vat
        - withholding_tax
        - work
      description: Type of invoice adjustment.
      title: InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsType
    InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsStatus:
      type: string
      enum:
        - approved
        - declined
        - not_payable
        - paid
        - pending
        - processing
      description: Current processing status of the invoice adjustment.
      title: >-
        InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsStatus
    InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsContractType:
      type: string
      enum:
        - ongoing_time_based
        - milestones
        - time_based
        - pay_as_you_go_time_based
        - commission
        - payg_milestones
        - payg_tasks
        - eor
        - unknown
        - employee
        - global_payroll
        - shield_msa
        - hris_direct_employee
        - peo
      description: Type of the contract.
      title: >-
        InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsContractType
    InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsContract:
      type: object
      properties:
        id:
          type: string
          description: Unique identifier of the contract.
        type:
          $ref: >-
            #/components/schemas/InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsContractType
          description: Type of the contract.
        title:
          type: string
          description: Human-readable contract title.
      required:
        - id
        - type
        - title
      description: Contract associated with this invoice adjustment.
      title: >-
        InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsContract
    InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsWorksheet:
      type: object
      properties:
        days:
          type: number
          format: double
          description: Number of days reported.
        hours:
          type: number
          format: double
          description: Number of hours reported.
        weeks:
          type: number
          format: double
          description: Number of weeks reported.
        minutes:
          type: number
          format: double
          description: Number of minutes reported.
      required:
        - days
        - hours
        - weeks
        - minutes
      description: Breakdown of time used for time-based calculations.
      title: >-
        InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsWorksheet
    InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsAttachment:
      type: object
      properties:
        key:
          type: string
          description: >-
            Storage key returned from the attachments endpoint, can be used as a
            unique identifier for the file
        filename:
          type: string
          description: >-
            Original filename of the uploaded attachment, download link can be
            found on the individual invoice adjustment endpoint
      required:
        - key
        - filename
      description: File attachment linked to the invoice adjustment.
      title: >-
        InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsAttachment
    InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsReportedById:
      oneOf:
        - type: string
        - type: integer
          format: int64
      description: Unique identifier of the reporting user.
      title: >-
        InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsReportedById
    InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsReportedBy:
      type: object
      properties:
        id:
          $ref: >-
            #/components/schemas/InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsReportedById
          description: Unique identifier of the reporting user.
        full_name:
          type: string
          description: Full name of the reporting user.
      required:
        - id
      description: User who reported the invoice adjustment.
      title: >-
        InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsReportedBy
    InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsReviewedById:
      oneOf:
        - type: string
        - type: integer
          format: int64
      description: Unique identifier of the reviewer.
      title: >-
        InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsReviewedById
    InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsReviewedBy:
      type: object
      properties:
        id:
          $ref: >-
            #/components/schemas/InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsReviewedById
          description: Unique identifier of the reviewer.
        remarks:
          type:
            - string
            - 'null'
          description: Reviewer remarks or decision notes.
        full_name:
          type: string
          description: Full name of the reviewer.
        reviewed_at:
          type:
            - string
            - 'null'
          description: Timestamp when the review occurred.
      required:
        - id
        - remarks
        - reviewed_at
      description: Reviewer information if the adjustment has been reviewed.
      title: >-
        InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsReviewedBy
    InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsPaymentCycle:
      type: object
      properties:
        end:
          type:
            - string
            - 'null'
          format: date-time
          description: End date of the payment cycle.
        start:
          type:
            - string
            - 'null'
          format: date-time
          description: Start date of the payment cycle.
      description: Payment cycle associated with this adjustment.
      title: >-
        InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsPaymentCycle
    InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsHourlyReportPreset:
      type: object
      properties:
        id:
          type: string
          format: uuid
          description: Id of assigned preset
        rate:
          type:
            - number
            - 'null'
          format: double
          description: Assigned preset rate
        title:
          type: string
          description: Description of assigned preset
      title: >-
        InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsHourlyReportPreset
    InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItems:
      type: object
      properties:
        id:
          type:
            - string
            - 'null'
          format: uuid
          description: Unique identifier of this invoice adjustment.
        type:
          $ref: >-
            #/components/schemas/InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsType
          description: Type of invoice adjustment.
        scale:
          type:
            - string
            - 'null'
          description: Predefined scale used to calculate the adjustment amount.
        status:
          oneOf:
            - $ref: >-
                #/components/schemas/InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsStatus
            - type: 'null'
          description: Current processing status of the invoice adjustment.
        contract:
          $ref: >-
            #/components/schemas/InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsContract
          description: Contract associated with this invoice adjustment.
        quantity:
          type:
            - number
            - 'null'
          format: double
          description: Quantity used to calculate the total amount.
        worksheet:
          oneOf:
            - $ref: >-
                #/components/schemas/InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsWorksheet
            - type: 'null'
          description: Breakdown of time used for time-based calculations.
        attachment:
          oneOf:
            - $ref: >-
                #/components/schemas/InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsAttachment
            - type: 'null'
          description: File attachment linked to the invoice adjustment.
        created_at:
          type: string
          format: date-time
          description: Timestamp when the adjustment was created (ISO-8601).
        invoice_id:
          type:
            - number
            - 'null'
          format: double
          description: Identifier of the generated invoice this adjustment belongs to.
        description:
          type:
            - string
            - 'null'
          description: Human-readable explanation of the invoice adjustment.
        reported_by:
          $ref: >-
            #/components/schemas/InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsReportedBy
          description: User who reported the invoice adjustment.
        reviewed_by:
          oneOf:
            - $ref: >-
                #/components/schemas/InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsReviewedBy
            - type: 'null'
          description: Reviewer information if the adjustment has been reviewed.
        custom_scale:
          type:
            - string
            - 'null'
          description: Custom scale label defined by the client.
        total_amount:
          type: string
          description: Total monetary value of the invoice adjustment.
        currency_code:
          type: string
          description: ISO 4217 currency code used for the amount.
        payment_cycle:
          $ref: >-
            #/components/schemas/InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsPaymentCycle
          description: Payment cycle associated with this adjustment.
        date_submitted:
          type:
            - string
            - 'null'
          format: date-time
          description: Timestamp when the adjustment was submitted for review.
        hourlyReportPreset:
          oneOf:
            - $ref: >-
                #/components/schemas/InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItemsHourlyReportPreset
            - type: 'null'
      required:
        - id
        - type
        - status
        - contract
        - quantity
        - worksheet
        - attachment
        - created_at
        - description
        - reported_by
        - reviewed_by
        - total_amount
        - currency_code
        - payment_cycle
      title: InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItems
    InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaPage:
      type: object
      properties:
        offset:
          type: number
          format: double
          description: Index of the first record in the current page.
        total_rows:
          type: number
          format: double
          description: Total number of records available.
        items_per_page:
          type: number
          format: double
          description: Number of records returned per page.
      required:
        - offset
        - total_rows
        - items_per_page
      description: Pagination metadata for the response.
      title: InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaPage
    invoice-adjustments_getInvoiceAdjustments_Response_200:
      type: object
      properties:
        data:
          type: array
          items:
            $ref: >-
              #/components/schemas/InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaDataItems
          description: List of invoice adjustments returned for the request.
        page:
          $ref: >-
            #/components/schemas/InvoiceAdjustmentsGetResponsesContentApplicationJsonSchemaPage
          description: Pagination metadata for the response.
      required:
        - data
        - page
      title: invoice-adjustments_getInvoiceAdjustments_Response_200
    ListInvoiceAdjustments-v2026-01-01RequestBadRequestError:
      type: object
      properties:
        error:
          type: string
      required:
        - error
      title: ListInvoiceAdjustments-v2026-01-01RequestBadRequestError
    ApiErrorRequest:
      type: object
      properties:
        method:
          type: string
          description: The HTTP method of the failed request
        url:
          type: string
          description: The relative URL of the failed request
        status:
          type: number
          format: double
          description: The status code of the response
        api_req_id:
          type: string
          description: The request ID of the failed request
        docs:
          type: string
          description: >-
            A link to the official documentation for the requested endpoint
            resource
        source:
          type: string
          description: The source handler which produced the returned error
        code:
          type: number
          format: double
          description: The code of the source handler which produced the returned error
      title: ApiErrorRequest
    ApiError:
      type: object
      properties:
        message:
          type: string
          description: A description of the returned error
        path:
          type: string
          description: The JSON path where input validation failed
      title: ApiError
    ApiErrorContainer:
      type: object
      properties:
        request:
          $ref: '#/components/schemas/ApiErrorRequest'
        errors:
          type: array
          items:
            $ref: '#/components/schemas/ApiError'
      title: ApiErrorContainer
  securitySchemes:
    deelToken:
      type: http
      scheme: bearer
      description: >
        ## Authentication

        The Deel API uses bearer tokens to authenticate requests. All API calls
        must be made over HTTPS — calls over plain HTTP or without
        authentication will fail.


        ```curl

        curl -X GET 'https://api.letsdeel.com/rest/v2/contracts' \
          -H 'Authorization: Bearer YOUR-TOKEN-HERE'
        ```


        [Learn more about authentication](/api/authentication)
    oauth2:
      type: http
      scheme: bearer
      description: >-
        Standard OAuth2 security scheme based on
        https://swagger.io/docs/specification/authentication/

```

## SDK Code Examples

```python
import requests

url = "https://api.letsdeel.com/rest/v2/invoice-adjustments"

querystring = {"contract_id":"string","contract_types":"[\"ongoing_time_based\"]","types":"[\"milestone\"]","statuses":"[\"approved\"]","invoice_id":"string","reporter_id":"string","date_from":"2022-12-31","date_to":"2022-12-31","limit":"20","offset":"1"}

headers = {"Authorization": "Bearer <token>"}

response = requests.get(url, headers=headers, params=querystring)

print(response.json())
```

```javascript
const url = 'https://api.letsdeel.com/rest/v2/invoice-adjustments?contract_id=string&contract_types=%5B%22ongoing_time_based%22%5D&types=%5B%22milestone%22%5D&statuses=%5B%22approved%22%5D&invoice_id=string&reporter_id=string&date_from=2022-12-31&date_to=2022-12-31&limit=20&offset=1';
const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go
package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://api.letsdeel.com/rest/v2/invoice-adjustments?contract_id=string&contract_types=%5B%22ongoing_time_based%22%5D&types=%5B%22milestone%22%5D&statuses=%5B%22approved%22%5D&invoice_id=string&reporter_id=string&date_from=2022-12-31&date_to=2022-12-31&limit=20&offset=1"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("Authorization", "Bearer <token>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby
require 'uri'
require 'net/http'

url = URI("https://api.letsdeel.com/rest/v2/invoice-adjustments?contract_id=string&contract_types=%5B%22ongoing_time_based%22%5D&types=%5B%22milestone%22%5D&statuses=%5B%22approved%22%5D&invoice_id=string&reporter_id=string&date_from=2022-12-31&date_to=2022-12-31&limit=20&offset=1")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'

response = http.request(request)
puts response.read_body
```

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.get("https://api.letsdeel.com/rest/v2/invoice-adjustments?contract_id=string&contract_types=%5B%22ongoing_time_based%22%5D&types=%5B%22milestone%22%5D&statuses=%5B%22approved%22%5D&invoice_id=string&reporter_id=string&date_from=2022-12-31&date_to=2022-12-31&limit=20&offset=1")
  .header("Authorization", "Bearer <token>")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('GET', 'https://api.letsdeel.com/rest/v2/invoice-adjustments?contract_id=string&contract_types=%5B%22ongoing_time_based%22%5D&types=%5B%22milestone%22%5D&statuses=%5B%22approved%22%5D&invoice_id=string&reporter_id=string&date_from=2022-12-31&date_to=2022-12-31&limit=20&offset=1', [
  'headers' => [
    'Authorization' => 'Bearer <token>',
  ],
]);

echo $response->getBody();
```

```csharp
using RestSharp;

var client = new RestClient("https://api.letsdeel.com/rest/v2/invoice-adjustments?contract_id=string&contract_types=%5B%22ongoing_time_based%22%5D&types=%5B%22milestone%22%5D&statuses=%5B%22approved%22%5D&invoice_id=string&reporter_id=string&date_from=2022-12-31&date_to=2022-12-31&limit=20&offset=1");
var request = new RestRequest(Method.GET);
request.AddHeader("Authorization", "Bearer <token>");
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = ["Authorization": "Bearer <token>"]

let request = NSMutableURLRequest(url: NSURL(string: "https://api.letsdeel.com/rest/v2/invoice-adjustments?contract_id=string&contract_types=%5B%22ongoing_time_based%22%5D&types=%5B%22milestone%22%5D&statuses=%5B%22approved%22%5D&invoice_id=string&reporter_id=string&date_from=2022-12-31&date_to=2022-12-31&limit=20&offset=1")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "GET"
request.allHTTPHeaderFields = headers

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```