> ## Documentation Index
> Fetch the complete documentation index at: https://docs.gvb-staging.co.uk/llms.txt
> Use this file to discover all available pages before exploring further.

# External API

> Build secure integrations with Gift Voucher Brilliance.

The GVB External API lets approved integrations synchronise tenants, catalog data, purchased vouchers, and marketing signups, then resolve and redeem vouchers through a controlled two-step workflow.

<CardGroup cols={2}>
  <Card title="Start an integration" icon="rocket" href="/quickstart">
    Authenticate and make your first read request.
  </Card>

  <Card title="API reference" icon="brackets-curly" href="/api-reference/tenants/list-available-tenants">
    Explore all 11 external v1 operations and schemas.
  </Card>
</CardGroup>

The documentation is public, but every API operation requires a bearer token. Live requests are disabled here; use your personalised Postman collection from GVB's API Access page when you need an interactive client.

The API reference provides Production, Staging, and Local servers. Choose the server matching the documentation environment; the public production base URL is `https://app.giftvoucherbrilliance.co.uk/api/external/v1`.