Client Certificates

Configure certificate authority (CA) and client certificates to use within tests on a per-URL basis.

info

Document Scope

This document merely offers guidance on how to specify certificate file paths for given test URLs. Details around the content and purpose of such files are not within the scope of Cypress documentation.

Syntax

clientCertificates (Object[])

An array of objects defining the certificates. Each object must have the following properties

Property	Type	Description
url	String	URL to match requests against. Wildcards following minimatch rules are supported.
ca	Array	(Optional) Paths to one or more CA files to validate certs against, relative to project root.
certs	Object[]	A PEM format certificate/private key pair or PFX certificate container

Each object in the certs array can define either a PEM format certificate/private key pair or a PFX certificate container.

A PEM format certificate/private key pair can have the following properties:

Property	Type	Description
cert	String	Path to the certificate file, relative to project root.
key	String	Path to the private key file, relative to project root.
passphrase	String	(Optional) Path to a text file containing the passphrase, relative to project root.

A PFX certificate container can have the following properties:

Property	Type	Description
pfx	String	Path to the certificate container, relative to project root.
passphrase	String	(Optional) Path to a text file containing the passphrase, relative to project root.

Usage

To configure CA / client certificates within your Cypress configuration, you can add the clientCertificates key to define an array of client certificates as shown below:

cypress.config.js

const { defineConfig } = require('cypress')

module.exports = defineConfig({
  clientCertificates: [
    {
      url: 'https://a.host.com',
      ca: ['certs/ca.pem'],
      certs: [
        {
          cert: 'certs/cert.pem',
          key: 'certs/private.key',
          passphrase: 'certs/pem-passphrase.txt',
        },
      ],
    },
    {
      url: 'https://b.host.com/a_base_route/**',
      ca: [],
      certs: [
        {
          pfx: '/home/tester/certs/cert.pfx',
          passphrase: '/home/tester/certs/pfx-passphrase.txt',
        },
      ],
    },
    {
      url: 'https://a.host.*.com/',
      ca: [],
      certs: [
        {
          pfx: 'certs/cert.pfx',
          passphrase: 'certs/pfx-passphrase.txt',
        },
      ],
    },
  ],
})

cypress.config.ts

import { defineConfig } from 'cypress'

export default defineConfig({
  clientCertificates: [
    {
      url: 'https://a.host.com',
      ca: ['certs/ca.pem'],
      certs: [
        {
          cert: 'certs/cert.pem',
          key: 'certs/private.key',
          passphrase: 'certs/pem-passphrase.txt',
        },
      ],
    },
    {
      url: 'https://b.host.com/a_base_route/**',
      ca: [],
      certs: [
        {
          pfx: '/home/tester/certs/cert.pfx',
          passphrase: '/home/tester/certs/pfx-passphrase.txt',
        },
      ],
    },
    {
      url: 'https://a.host.*.com/',
      ca: [],
      certs: [
        {
          pfx: 'certs/cert.pfx',
          passphrase: 'certs/pfx-passphrase.txt',
        },
      ],
    },
  ],
})

History

Version	Changes
8.0.0	Added Client Certificates configuration options