Upload an expense document for a transaction

POST 
/api/transactions/:id/expense-upload

This endpoint uploads an expense document for an existing transaction.

Prerequisites:

To use this endpoint you need to have the ACCOUNTING scope for the API Key. Please contact your relation manager to get this permission.

Eligibility: The transaction type must be enabled in the business partner expense settings targets.

Request

Path Parameters

id stringrequired

Transaction identifier

Header Parameters

Unique-Request-Id string

Possible values: <= 50 characters

An optional unique identifier for the request, limited to 50 characters. Used to track requests and prevent duplication.

multipart/form-data

Body

required

file binaryrequired

Responses

201

Created - The request was processed successfully.

application/json

Schema

Schema

id string
name stringnullable
mimeType string
transactionId integernullable
createdAt string

Datetime of the creation in format Y-m-d H:i:s.

Example (from schema)

{
  "id": 1,
  "name": "document.pdf",
  "mimeType": "application/pdf",
  "transactionId": "1",
  "createdAt": "2027-11-22 13:00:00"
}

400

Bad Request -- Your request is invalid.

application/json

Schema

Schema

detail string
title string

Example (from schema)

{
  "detail": "The `file` parameter is required.",
  "title": "An error occurred"
}

401

Unauthorised -- Your access token is wrong.

application/json

Schema

Schema

type string
title string
detail string

Example (from schema)

{
  "type": "string",
  "title": "string",
  "detail": "string"
}

403

Forbidden -- Access to the requested resource or action is forbidden.

application/json

Schema

Schema

title stringnullable

A short, human-readable summary of the problem.

detail stringnullable

A human-readable explanation specific to this occurrence of the problem.

status numbernullable

Default value: 400

instance stringnullable

A URI reference that identifies the specific occurrence of the problem. It may or may not yield further information if dereferenced.

type string

A URI reference that identifies the problem type

Example (from schema)

{
  "title": "string",
  "detail": "string",
  "status": 400,
  "instance": "string",
  "type": "string"
}

422

Unprocessable Content -- We could not process your request due to invalid data provided.

application/json

Schema

Schema

status integer

Default value: 422

violations object[]
Array [
propertyPath stringrequired
The property path of the violation
message stringrequired
The message associated with the violation
code string
The code of the violation
hint string
An extra hint to understand the violation
payload object
The serialized payload of the violation
property name* any
The serialized payload of the violation
]
detail string
type string
title stringnullable
instance stringnullable

Example (from schema)

{
  "status": 422,
  "violations": [
    {
      "propertyPath": "string",
      "message": "string",
      "code": "string",
      "hint": "string",
      "payload": {}
    }
  ],
  "detail": "string",
  "type": "string",
  "title": "string",
  "instance": "string"
}

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