Installing SchemaClient

Download and install the free SchemaClient API testing tool on Windows, macOS or Linux. No account needed to start sending requests.

Updated

SchemaClient is a desktop application, so there is nothing to configure on a server and no browser extension to install. Pick the installer for your platform from the download page and you are testing APIs a minute later.

Windows

Download the .msi installer and run it. Windows SmartScreen may warn you about an unrecognised publisher — choose More info, then Run anyway. The app installs per-user, so you do not need administrator rights.

macOS

Download the .dmg and drag SchemaClient into your Applications folder. Both Apple Silicon and Intel machines are supported. On first launch, right-click the app icon and choose Open so macOS lets you past the Gatekeeper prompt.

Linux

Two packages are published:

  • AppImage — works on any distribution. Mark it executable and run it:
chmod +x SchemaClient-*.AppImage
./SchemaClient-*.AppImage
  • .deb — for Debian and Ubuntu derivatives:
sudo dpkg -i schemaclient_*.deb

Verifying the install

Launch the app and send a request to a public endpoint to confirm everything works:

GET https://api.github.com/zen

A 200 OK with a short line of text means the REST client is working. From here, learn how to test a REST API properly, or jump straight to exposing localhost to the internet.

Frequently asked questions

Do I need an account to use SchemaClient?

No. The REST client, collections and schema validation all work offline with no account. You only need to sign in for localhost tunneling and cloud sync, because both run through our servers.

Is SchemaClient really free?

Yes. Every feature is free with no usage limits, no seat pricing and no subscription. There is no paid tier to upgrade to.