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# Calling out with REST
- URL: https://www.namastesalesforce.com/courses/integration-patterns/calling-out-with-rest/
- Published: 2026-08-05T03:00:00.000Z
- Updated: 2026-08-05T03:00:00.000Z
- Description: Named credentials, callouts and the test mock you need.
- Author: Swarnil Singhai
- Tags: Integration Patterns, #lesson-col, #duration-25m, #Import 2026-09-02 14:55

Named credentials, callouts and the test mock you need. This page is demo content generated for the theme — replace it with the real thing, keep the tags.

## The idea

One concept per lesson, applied immediately in your own org.

## Watch out for

The mistake everyone makes at this step, and how to notice it early.

## Try it yourself

- Open your Developer Edition org and follow along
- Change one thing at a time and note what happens
- When something breaks, read the error before searching it