How to create a new realm with the Keycloak REST API?

In this blog post I want to show, how to create a new realm with Keycloak REST API , because later I want to automate the Keycloak realm creation for a workshop using curl in a bash script.

The reason of that blog post is, that the information in the REST API documentation wasn’t detailed enough for me. The image shows what I found first in the Keycloak REST API documentation .


In common it’s very simple to use the Keycloak REST API. For more details see in my blog post Getting started to secure a simple Java Microservice with Keycloak, MicroProfile and OpenLiberty.

First you need a bearer authorization token for an administration user and with that token you create a new realm using the realm json exported before.

Here is what I found:

I used POSTMAN to check it out. These are the steps I did in POSTMAN.

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A Node-RED Twitter-follower-flow

In my last blog post I did an introduction to “how use the starter kit for Node-RED on IBM Cloud” and in this new blog post I want to highlight the Node-RED Twitter-follower-flow I developed as an introduction to different topics I frequently face at hackathons. Here is the link to the “Twitter-follower-flow” GitHub project. Node-RED is very good for prototyping, that is the reason why it is often used in hackathons. If you are new to Node-RED and you start  to develop a Node-RED flow, you normally have following challenges:

  • How to …
    1. … define own REST endpoints to encapsulate an external API?
    2. … automate the authentication to that external API?
    3. … extract data from the external API?
    4. … customize data and CRUD with databases?

The Node-RED flow of that project has the objective to provide an (little advanced) introduction to the first three topics above. The CRUD (Create, Read, Update, Delete) topic is not covered here. Visit that CRUD example for more information.

  • The “Twitter-follower-flow” example …
    • … uses open technologies (Node-RED is a Project of the OpenJS foundation )
    • … creates no additional costs
    • … has following technical level:
      • Beginner to intermediate
      • Needs a basic knowledge of JavaScript and REST
    • … takes 30 – 45 min to setup the example from scratch
      1. Register on IBM Cloud
      2. Create a Node-RED instance on IBM Cloud
      3. Register at Twitter for a developer API Account
      4. Copy the existing Node-RED flow
      5. Configure the flow
      6. Run the flow

The YouTube video below gives you a 13 min more detailed introduction to the Twitter-follower-flow.

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