Creates a document attachment in Business Central.
HTTP request
Replace the URL prefix for Business Central depending on environment following the guideline.
POST businesscentralPrefix/companies({id})/documentAttachments({id})
Request headers
| Header | Value | 
|---|---|
| Authorization | Bearer {token}. Required. | 
| Content-Type | application/json | 
Request body
In the request body, supply a JSON representation of a documentAttachment object.
Response
If successful, this method returns 201 Created response code and a documentAttachment object in the response body.
Example
Request
Here's an example of the request.
POST https://{businesscentralPrefix}/api/v2.0/companies({id})/documentAttachments({id})
Content-type: application/json
{
    "fileName": "Invoice_10542.pdf",
    "byteSize": 245823,
    "attachmentContent": "JVBERi0xLjUKJeTl5OTlCjEgMCBvYmoKPDwKL1R5cGUgL0NhdGFsb2cKL1BhZ2VzIDIgMCBSCj4+CmVuZG9iagoyIDAgb2JqCjw8Ci9UeXBlIC9QYWdlcwo+PgplbmRvYmoKeHJlZgowIDMKMDAwMDAwMDAwMCiAgICAgIG4gCjAwMDAwMDAwMTAgMDAwMDAgbiAKMDAwMDAwMDA1MyAwMDAwMCBuIAp0cmFpbGVyCjw8Ci9Sb290IDEgMCBSCi9TaXplIDMKPj4KJWlzQmluYXJ5Cg==",
    "parentType": "Purchase Invoice",
    "parentId": "INV-10542",
    "documentFlowPurchase": true
}
Response
Here's an example of the response.
HTTP/1.1 201 Created
Content-type: application/json
{
    "id": "ATT00089",
    "fileName": "Invoice_10542.pdf",
    "byteSize": 245823,
    "attachmentContent": "JVBERi0xLjUKJeTl5OTlCjEgMCBvYmoKPDwKL1R5cGUgL0NhdGFsb2cKL1BhZ2VzIDIgMCBSCj4+CmVuZG9iagoyIDAgb2JqCjw8Ci9UeXBlIC9QYWdlcwo+PgplbmRvYmoKeHJlZgowIDMKMDAwMDAwMDAwMCiAgICAgIG4gCjAwMDAwMDAwMTAgMDAwMDAgbiAKMDAwMDAwMDA1MyAwMDAwMCBuIAp0cmFpbGVyCjw8Ci9Sb290IDEgMCBSCi9TaXplIDMKPj4KJWlzQmluYXJ5Cg==",
    "parentType": "Purchase Invoice",
    "parentId": "INV-10542",
    "lineNumber": 0,
    "documentFlowSales": false,
    "documentFlowPurchase": true,
    "lastModifiedDateTime": "2025-04-29T14:25:36Z"
}
Related information
Tips for working with the APIs
documentAttachment
GET documentAttachment
DELETE documentAttachment
PATCH documentAttachment