How to Create a Pub/Sub Topic (Step-by-Step Guide)

 Here is a simple, clear, step-by-step guide on how to create a Cloud Pub/Sub topic in Google Cloud using the required format:

✅ 

Cloud Pub/Sub Topic Name Format

Google Cloud Pub/Sub requires a topic name in this format:

projects/{project_id}/topics/{topic_name}

• project_id → Your Google Cloud project ID
• topic_name → The name you want for your topic

Example:

projects/my-app-123/topics/userEvents

📌 

How to Create a Pub/Sub Topic (Step-by-Step Guide)

Method 1: Google Cloud Console (Easiest)

1. Open Pub/Sub

Go to:

Google Cloud Console → Pub/Sub → Topics

Direct link (safe):

Search “Google Cloud Pub/Sub Topics” in your browser.

2. Click “Create Topic”

3. Enter Topic Name

In the Topic ID field, write only the topic name:

userEvents

Google Cloud automatically shows you the full resource name:

projects/{project_id}/topics/userEvents

4. Leave default settings OR customize

You can choose:

✔ Message retention

✔ Encryption

✔ Labels

5. Click “Create”

Your topic is created.

Method 2: gcloud CLI (Command Line)

1. Install Google Cloud SDK

 (if not installed)

Search: “Google Cloud SDK install”

2. Login

gcloud auth login

3. Set your project

gcloud config set project YOUR_PROJECT_ID

4. Create the topic

gcloud pubsub topics create userEvents

Method 3: REST API

POST request:

POST https://pubsub.googleapis.com/v1/projects/{project_id}/topics/{topic_name}

Example:

POST https://pubsub.googleapis.com/v1/projects/my-app-123/topics/userEvents

📦 

Your Final Topic Name Structure

After creation, the topic will always look like this:

projects/my-app-123/topics/userEvents

This is the value used by:

• Cloud Functions triggers
• Cloud Run services
• Pub/Sub subscribers
• APIs & SDKs

❓ Want help creating 

Subscriptions

, 

Triggering Functions

, or 

Publishing messages

?