---
title: "Guide: Determine pricing through third-party systems"
description: "Implement custom logic to retrieve product prices from third-party systems."
url: https://medusajs.com/blog/guide-determine-pricing-through-third-party-systems
last_updated: 2026-08-13T13:37:50Z
---

# Guide: Determine pricing through third-party systems

_Published 2025-02-06 by Shahed  Nasser in Product_

Many commerce companies rely on product and pricing data from external systems, such as ERPs, PIMs, or other third-party APIs. Typically, this data needs to be replicated in the commerce platform to power checkout experiences, including adding products to a cart.

This is a challenge, as it requires spending a lot of resources building a robust integration syncing data between the systems. Medusa’s extensible architecture offers a simpler alternative where data is pulled from your external systems in real time, as your customers go through their checkout flow.

[This technical guide](https://docs.medusajs.com/resources/examples/guides/custom-item-price) demonstrates how to implement these capabilities in Medusa. It shows you how you can query real-time metal prices upon adding products to a cart. While this guide uses the GoldAPI as an external system, the approach would be the same for pulling in prices from your ERP or PIM.

> **Custom Line Item Pricing**
>
> Visit the step-by-step guide in the documentation
>
> [Get Started](https://docs.medusajs.com/resources/examples/guides/custom-item-price)

Several companies, including [EKI](https://medusajs.com/blog/eki/), already use Medusa's custom line item pricing to leverage on-demand price retrieval in the checkout flow.