How to use a proxy with Cypress

Why does Cypress need a proxy?

Running your tests through a proxy shows how your site behaves for a visitor in another country: prices, language, consent banners and blocked content.

Which proxy works best with Cypress?

Any plan with the country you want to test from. Use a sticky session so one run is one visitor.

• Residentialfrom $3.52 per GB
• Residential Litefrom $0.96 per GB
• Mobilefrom $3.52 per GB

Proxy settings for Cypress: host, port and login

A BooProxies plan gives you four things: a host, a port, a username and a password. These are the values for Residential; the username and password are on your plan page.

As one address:

http://USERNAME:PASSWORD@resi.proxies.boo:8080

The country and the session are chosen in the username, not in a separate setting. The generator on your plan page writes the username for you, and Targeting and sessions explains each part.

Cypress proxy setup, step by step

1. Set HTTP_PROXY and HTTPS_PROXY to the proxy address in the shell.
2. Start Cypress from that same shell.

Cypress proxy example

macOS and Linux

export HTTP_PROXY=http://USERNAME:PASSWORD@resi.proxies.boo:8080
export HTTPS_PROXY=http://USERNAME:PASSWORD@resi.proxies.boo:8080
npx cypress run

Windows PowerShell

$env:HTTP_PROXY = "http://USERNAME:PASSWORD@resi.proxies.boo:8080"
$env:HTTPS_PROXY = "http://USERNAME:PASSWORD@resi.proxies.boo:8080"
npx cypress run

Replace USERNAME and PASSWORD with the login from your plan page. The example asks an IP-check address, so the output is the address your request left from.

Rotating or sticky sessions for Cypress?

If Cypress is acting as one visitor through several steps, use a sticky session so the IP address stays the same throughout. If each run is independent, leave the session out and every run starts from a new address.

A sticky username looks like this:

USERNAME-country-us-time-600-session-a1b2c3d4

Cypress proxy not working?

• Set NO_PROXY=localhost,127.0.0.1 as well if your tests also talk to a server on your own machine.
• Use a sticky username, so every request of one test run comes from the same visitor.
• A 407 error means the username or password was not accepted. Copy both again from your plan page, and check that nothing added a space or cut the username short.
• If the IP address is in the wrong country, look at the username: the country code is part of it. More fixes.

Questions about Cypress and proxies

Terms explained: headless browser, rotating proxy, sticky session, proxy authentication.

Cypress is a product of its own makers. BooProxies is not affiliated with it; the name is used here only to say what this guide is about. Use it within the rules of the sites you work with and our acceptable use policy.