whmcs-api

We support many different ways to customize your WHMCS installation, all of which have their own troubleshooting needs.

During the development process, you may need to verify whether your API code is working correctly.

API authentication credentials allow your API-connected devices and systems to authenticate with WHMCS using API roles that you create.

WHMCS integrates with popular team communication apps, including Slack® and HipChat™, to allow WHMCS to notify you in real time as events occur.

To prevent problems, we recommend testing updates and customizations in a test environment before applying them to your production server.

OpenID Connect is the online standard for Single Sign-On and identity provisioning. It uses JSON-based identity tokens (JWT) and OAuth 2.0.

OpenID Connect uses JSON-based identity tokens (JWT) and OAuth 2.0 to allow third-party applications to access WHMCS with Single Sign-On.

Troubleshoot and resolve Your license key is invalid errors in the API.

Troubleshoot and resolve Sending Failed errors.