The End of Life (EOL) date of Rules and Hooks will be November 18, 2026, and they are no longer available to new tenants created as of October 16, 2023. Existing tenants with active Hooks will retain Hooks product access through end of life.We highly recommend that you use Actions to extend Auth0. With Actions, you have access to rich type information, inline documentation, and public npm packages, and can connect external integrations that enhance your overall extensibility experience. To learn more about what Actions offer, read Understand How Auth0 Actions Work.To help with your migration, we offer guides that will help you migrate from Rules to Actions and migrate from Hooks to Actions. We also have a dedicated Move to Actions page that highlights feature comparisons, an Actions demo, and other resources to help you on your migration journey.To read more about the Rules and Hooks deprecation, read our blog post: Preparing for Rules and Hooks End of Life.
We expose IPv6 addresses in our public endpoints (e.g., travel0.us.auth0.com). If a request arrives from a machine that supports IPv6, then the context.request.ip property will contain an IPv6 address. If you perform manual IP address manipulation, we suggest you use the ipaddr.js@1.9.0 library.
To debug any Auth0 Rule you have created, you can use console.log from within your rule code. You can see console.log output by using the Save and Try, viewing the logs available with the Real-time Webtask Logs extension, or for legacy clients, using the Debug Rule CLI.
Dashboard - Auth Pipeline - Rules - Edit Rule

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Try this Rule

In the Rules Editor, the Save and Try button lets you run a Rule in isolation with mock user and context objects. Clicking TRY will run the Rule with those two objects as input and will display any console.log output. The Try this rule script feature functions outside a specific client context. When using this feature, you may run into issues if your Rule depends on data that would be provided when called from an actual application.
Auth0 Pipeline - Rules - Try this rule

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Real-time logs extension

The Real-time Webtask Logs extension displays all logs in real-time for all custom code in your account, which includes all console.log output and exceptions. To learn more, read Real-time Webtask Logs.

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Debug Rule CLI

Only tenants created prior to 17 July 2018 have access to Webtask.io and the Webtask CLI. If you are an enterprise customer with a newer tenant, please contact your account representative to request access. Other requests can be made through the Auth0 Contact Form and will be evaluated on a case-by-case basis.
In the Rules Editor, the Save and Debug option displays instructions for installing, configuring, and running the webtask CLI for debugging Rules. Paste these commands into a terminal to see the console.log output and any unhandled exceptions that occur during Rule execution. For example: 
~  npm install -g wt-cli
~  wt init --container "youraccount" --url "https://sandbox.it.auth0.com" --token "eyJhbGci...WMPGI" -p "youraccount-default-logs"
~  wt logs -p "youraccount-default-logs"
[18:45:38.179Z]  INFO wt: connected to streaming logs (container=youraccount)
[18:47:37.954Z]  INFO wt: webtask container assigned
[18:47:38.167Z]  INFO wt: ---- checking email_verified for some-user@mail.com! ----
This debugging method works for Rules tried from the Dashboard and for those actually running during user authentication.