Quickstart

Sign up for a free account. You’ll land on the dashboard where you can manage connections and API keys.

In the dashboard, go to Settings → API Keys and click Create Key. Give it a name (e.g. “Development”).

Your key starts with sk_test_ for development or sk_live_ for production. Copy it now — it’s only shown once.

Follow the QWC Setup guide to:

• Create a connection
• Download your .qwc file
• Generate a password
• Install the connector in QuickBooks

Once the Web Connector syncs once, your company file is live.

Use your API key in the Authorization header as a Bearer token, and include X-Connection-ID to choose which connected QuickBooks company file the request should run against.

import { NxusClient, NxusApiError, type Vendor, type PaginatedPage } from '@nxus/sdk';

const nxus = new NxusClient({ apiKey: process.env.NXUS_API_KEY });

try {
  const result: PaginatedPage<Vendor> = await nxus.vendors.list({
    connectionId: 'conn_abc123',
    limit: 50
  });
  console.log(result.data);
} catch (err) {
  if (err instanceof NxusApiError) {
    console.error(`API Error: ${err.userMessage}`);
    console.log(err.validationErrors);
  }
}

Browse the Interactive API Reference for all 65+ QuickBooks resources including Vendors, Bills, Invoices, Customers, Accounts, and more.