> ## Documentation Index
> Fetch the complete documentation index at: https://apidocs.returnhelper.com/llms.txt
> Use this file to discover all available pages before exploring further.

# User API

> Authenticated endpoints for merchants and integration partners

User API endpoints cover the merchant integration surface: creating return requests and shipments, managing return inventory and FBA instructions, requesting recalls, resends, and value-added services, generating labels, and querying account state. Most are tenant-scoped — your `x-rr-apikey` determines which warehouses, service types, and orders are visible.

All requests must include `x-rr-apikey` and `x-rr-apitoken` headers. See the [Authentication section](/introduction#authentication) for how to obtain your credentials.

For state-changing requests, also include an `x-returnhelper-idempotency-key` header so retries don't create duplicate operations — see the [Idempotency section](/introduction#idempotency) for details.

Browse the endpoints from the navigation on the left.