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Generating machine-to-machine tokens

A machine-to-machine (M2M) token is a token requested by one application so it can communicate with another application acting as itself.

In Identity, we provide the ability to assign permissions to an application. This allows an application to perform requests to other applications without the need for user intervention. The token generated can then be used to communicate with other applications in Camunda 8 without the need for user intervention.

In this guide, we'll show you how to generate your own machine-to-machine (M2M) tokens.

Prerequisites​

  • A running Identity service
  • An application for your service
  • The client ID of your application
  • The client secret of your application
  • A REST client of your choice

Generate token​

In our example, the Keycloak instance that supports Identity can be found via http://localhost:18080. This may be different for you, so adjust the host name (and port if required) as appropriate.

To request a token, use the following cURL command replacing the placeholders with your applications details:

curl --location --request POST 'http://localhost:18080/auth/realms/camunda-platform/protocol/openid-connect/token' \
--header 'Content-Type: application/x-www-form-urlencoded' \
--data-urlencode 'client_id=[CLIENT_ID]' \
--data-urlencode 'client_secret=[CLIENT_SECRET]' \
--data-urlencode 'grant_type=client_credentials'