# Tutorials and Guides
source: https://developer.mastercard.com/pclo-presentment/documentation/tutorials-and-guides/index.md

## Tutorials {#tutorials}

### Offers for Publishers (Legacy) OAuth 2.0 authentication and first call {#offers-for-publishers-legacy-oauth-20-authentication-and-first-call}

This tutorial describes how to install and configure the Mastercard Insomnia plugin, set up OAuth 2.0 authentication, and send your first successful Offers for Publishers (Legacy) request.

[View tutorial](https://developer.mastercard.com/pclo-presentment/tutorial/offers-publishers-legacy-auth-first-call/index.md)