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Overview

To authenticate with Looker via OAuth, you need:
  1. Looker UI Hostname — the base URL of your Looker instance, used for the OAuth authorization redirect.
  2. Looker API Hostname — the API endpoint of your Looker instance (including port).
This guide will walk you through finding both hostnames.

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Prerequisites

  • An active Looker account with admin access.

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Instructions

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Step 1: Finding your Looker UI hostname

Your UI hostname is the domain you use to access Looker in the browser, without the https:// prefix. For example, if you access Looker at https://mycompany.looker.com, your UI hostname is mycompany.looker.com.

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Step 2: Finding your Looker API hostname

The API hostname may differ from the UI hostname and typically includes a port number.
  1. Log in to your Looker instance with admin access.
  2. Navigate to Admin > API.
  3. Check the API Host URL field.
    • If a value is configured, use that value (without the https:// prefix) as your API hostname.
    • If the field is empty, your API hostname is typically your UI hostname on port 19999 (e.g., mycompany.looker.com:19999).
For Looker-hosted (Google Cloud) instances, the API hostname is usually the same domain as the UI hostname without a custom port.

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Step 3: Enter credentials in the Connect UI

Once you have both hostnames:
  1. Open the form where you need to authenticate with Looker.
  2. Enter your Looker UI Hostname (e.g., mycompany.looker.com).
  3. Enter your Looker API Hostname (e.g., mycompany.looker.com:19999).
  4. Submit the form, and you should be successfully authenticated.
You are now connected to Looker (OAuth).