---
title: Register a dynamic backend
summary: Backends can be defined at runtime in compute applications to make requests to any host on the internet.
url: https://www.fastly.com/documentation/solutions/examples/register-a-dynamic-backend
---

Backends can be defined at runtime in compute applications to make requests to any host on the internet.

## Compute

### Rust

[Try it in Fastly Fiddle](https://fiddle.fastly.dev/b8788de1)

### Javascript

[Try it in Fastly Fiddle](https://fiddle.fastly.dev/b784bc22)

### Go

[Try it in Fastly Fiddle](https://fiddle.fastly.dev/d06e9e9a)