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Openscoring application for the Heroku cloud platform (
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Openscoring application for the Heroku cloud platform



Check out the latest version of the application:

git clone openscoring-heroku

Change the working directory to openscoring-heroku and log in to your Heroku user account:

heroku login

Create the Heroku application slot:

heroku create

Deploy the application to the Heroku application slot:

git push heroku master

Please refer to [Heroku documentation] ( for more specific dyno configuration options.


The base URL of the application is http://<application slot name> The installation can be verified by making a GET request to the model list endpoint at http://<application slot name> (e.g. opening this address in a web browser). Upon success, the response should contain a summary of deployed models as a JSON object.

The application implements full [Openscoring REST API] ( The access to HTTP methods PUT and DELETE that deal with model deployment and undeployment, respectively, is only permitted to users with the "admin" role. The Openscoring application grants this role to all users that originate from the local network. Unfortunately, the Heroku cloud platform does not provide access (e.g. secure shell) to the application container.

The Openscoring application watches the contents of the auto-deploy directory pmml for changes. A model can be deployed by placing a new PMML file into that directory. Conversely, a model can be undeployed by removing an existing PMML file from that directory. In both cases, the changes must be first committed to the local repository and then pushed to the remote repository.

Deploying a file DecisionTreeIris.pmml:

cp ~/work/DecisionTreeIris.pmml pmml/DecisionTreeIris.pmml
git add pmml/DecisionTreeIris.pmml
git commit -m "Added a model"
git push heroku master

The name of the file (without file name extension(s), if any) becomes the model identifier. Hence, the newly deployed model can be reached at http://<application slot name>

Undeploying a file DecisionTreeIris.pmml:

git rm pmml/DecisionTreeIris.pmml
git commit -m "Removed a model"
git push heroku master


Openscoring is dual-licensed under the [GNU Affero General Public License (AGPL) version 3.0] ( and a commercial license.

Additional information

Please contact [] (