COUNTCOUNT
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InvoicesUpload attachment

Upload attachment

POST/partners/invoices/{uuid}/attachments/upload

Uploads a file attachment via multipart form data.

Send multipart/form-data with a `documents` field. Sign the request with an empty-object body hash.

HMAC signature + Bearer access token
Try this request
Credit Memos APICustomers APIProducts & Services APITransactions API

Path parameters

uuiduuidrequired

The UUID of the invoice.

Responses

200Attachment uploaded.
400Missing file or validation error.
404Invoice not found.
401Missing or invalid HMAC signature, expired timestamp, or invalid Bearer token. Troubleshoot
403The credential does not have access to this workspace or resource. Troubleshoot
429Rate limit exceeded (100 requests per minute per clientId). Retry after the Retry-After header. Troubleshoot
POSThttps://api.getcount.com/partners/invoices/{uuid}/attachments/upload
Request
import crypto from 'node:crypto';

const BASE_URL = 'https://api.getcount.com';
const CLIENT_ID = process.env.COUNT_CLIENT_ID;
const CLIENT_SECRET = process.env.COUNT_CLIENT_SECRET;
const ACCESS_TOKEN = process.env.COUNT_ACCESS_TOKEN;

const method = 'POST';
const signingPath = '/invoices/3fa85f64-5717-4562-b3fc-2c963f66afa6/attachments/upload';
const timestamp = Math.floor(Date.now() / 1000).toString();
const bodyString = '';

const bodyHash = '';
const baseString = `${method}:${signingPath}:${timestamp}:${bodyHash}`;
const signature = crypto.createHmac('sha256', CLIENT_SECRET).update(baseString).digest('hex');

const response = await fetch(`${BASE_URL}/partners/invoices/3fa85f64-5717-4562-b3fc-2c963f66afa6/attachments/upload`, {
  method,
  headers: {
    'x-client-id': CLIENT_ID,
    'x-timestamp': timestamp,
    'x-signature': signature,
    Authorization: `Bearer ${ACCESS_TOKEN}`,
  },
});

console.log(await response.json());
Response · 200
{
  "status": "success",
  "data": {
    "invoice": {
      "id": "f6a7b8c9-d0e1-2345-fabc-456789012345",
      "invoiceNumber": "INV-1042",
      "invoiceType": "invoice",
      "customerUuid": "dfa3219e-6af8-4c53-997a-037534f63a35",
      "date": "2026-03-01",
      "dueDate": "2026-03-31",
      "currency": "USD",
      "status": "sent",
      "isDraft": false,
      "approved": true,
      "isSent": true,
      "paymentStatus": "unpaid",
      "subtotal": 1000,
      "taxTotal": 85,
      "total": 1085,
      "amountDue": 1085,
      "products": [
        {
          "productUuid": "aa11bb22-cc33-dd44-ee55-ff6677889900",
          "description": "Consulting services",
          "quantity": 10,
          "unitPrice": 100,
          "nonTaxable": false
        }
      ],
      "createdAt": "2026-03-01T09:00:00.000Z",
      "updatedAt": "2026-03-02T11:15:00.000Z"
    }
  }
}