GA4 custom-dimensions API

1. Create Google Cloud project

https://console.cloud.google.com/welcome

Enable API (GCP)

• Google+ API
• Google Analytics API
• Google Analytics Admin API

Create Credentials (GCP)

• Create API Key
• Setup OAuth consent screen (You will need to enable Google Analytics API minimum scopes - https://www.googleapis.com/auth/analytics and https://www.googleapis.com/auth/analytics.edit)
• Create OAuth 2.0 Client ID (You will need to list the URL https://localhost:8080/callback as a valid redirect URI in your Google APIs Console's project);
• Download Client secret JSON file and rename it to "client_secret.json"

2. Get ENV variables

• API_KEY - API key for your Google Cloud project
• CLIENT_ID - OAuth 2.0 Client ID for your Google Cloud project
• CLIENT_SECRET - OAuth 2.0 Client secret for your Google Cloud project

3. Create "variables.env" file

You should create a new file in your project directory and name it "variables.env". In this file, you will store the environment variables in the format VARIABLE_NAME=value, one variable per line. You need to add the following lines with your own values to "variables.env":

PROPERTY_ID=your_property_id
API_KEY=your_api_key
CLIENT_ID=your_client_id
CLIENT_SECRET=your_client_secret

Make sure there are no spaces around the = sign, and that each variable is defined on a separate line.

3. Create configuration list

1. You need to update "input_file.xlsx" (sheet "Tabelle1") and list there custom dimensions that need to be created. There are 4 columns in the sheet:

• "displayName" - a unique name for the dimension;
• "parameterName" - an item parameter when you choose the Item scope or an event parameter when you choose the Event scope or a user property when you choose the User scope;
• "scope" - specifies to which data the custom dimension or metric will be applied; there are 3 possible values: "EVENT" for an event-scoped dimension, "USER" for a user-scoped dimensio and "ITEM" for an item-scoped dimension;
• "description" - an optional text used to identify a custom dimension;

2. You need to update "input_file.xlsx" (sheet "Tabelle2") and list there GA4 property IDs for which custom dimensions listed in sheet "Tabelle1" need to be created. There is 1 column in the sheet with header "property_id"

4. Create custom dimensions

Project setup

Place in your project directory:

• src/main.py
• src/utils.py
• scr/variables.env
• client_secret.json
• requirements.txt
• input_file.xlsx

Setup environment

#create virtual environment
python -m venv kvenv
#activate virtual environment
source kvenv/bin/activate
#install Python packages 
pip install -r requirements.txt

Run Python code

python src/main.py

After running the code and inputting variables values, it will open up the authorization URL in a web browser.

You'll need to authorize the application, which will redirect you to a callback URL and enter the full callback URL in the prompt.