# Getting Started

- [Authentication](/fetch/getting-started/01-authentication)
- [Timestamps (v2 vs. v3)](/fetch/getting-started/02-timestamps)
- [Recommended Request Headers](/fetch/getting-started/03-req-headers)
- [Rate Limiting](/fetch/getting-started/04-rate-limiting)
- [Pagination](/fetch/getting-started/05-pagination)
- [Filtering Collections](/fetch/getting-started/06-filtering-collections)
- [Ordering Collections](/fetch/getting-started/07-ordering-collections)
- [Field Expansion](/fetch/getting-started/08-field-expansion)
- [Best Practices for Third Party Systems](/fetch/getting-started/09-third-party-best-practices)
  - [Get Items](/fetch/getting-started/09-third-party-best-practices#get-items/)
  - [Supporting Integration for Point-of-Sale Systems](/fetch/getting-started/09-third-party-best-practices#supporting-an-inventory-integration-for-point-of-sale-systems)
- [API Request Examples](/fetch/getting-started/10-api-req-examples)
  - [cURL](/fetch/getting-started/10-api-req-examples#curl)
  - [C# (RestSharp)](/fetch/getting-started/10-api-req-examples#c-restsharp)
  - [NodeJS](/fetch/getting-started/10-api-req-examples#nodejs)
- [Testing in Postman](/fetch/getting-started/11-testing-in-postman)
  - [What is Postman](/fetch/getting-started/11-testing-in-postman#what-is-postman)
  - [Install Postman & Import Collection](/fetch/getting-started/11-testing-in-postman#install-postman--import-collection/)
  - [Adding Environment and Variables](/fetch/getting-started/11-testing-in-postman#adding-environment-and-variables)
  - [Making First API Call](/fetch/getting-started/11-testing-in-postman#making-first-api-call)
- [Validating Fetch API Calls](/fetch/getting-started/12-validating-api-reqs)
- [Support Requests](/fetch/getting-started/13-support)