Securing your SPARQL Endpoint via OAuth SPARQL endpoints are easy for random visitors to accidentally overload. Virtuoso allows you to secure your SPARQL endpoint against such abuses in various ways, including OAuth. Sample scenario The following sample scenario demonstrates the OAuth keys and Protected SPARQL Endpoint features of the Virtuoso Auth UI: Download and install the Virtuoso Open Source Edition v7.2 ODS Framework VAD (VADs for other Open Source versions must be built from source) Go to http://<cname>:<port>/conductor, where <cname>:<port> are replaced by your local server values. Log in as user "dba" or another user with DBA privileges Go to System Admin-> User Accounts:

Click "Create New Account":

In the presented form enter respectively: Account name, for ex:demo1; enter password and then confirm it; User type: SQL/ODBC and WebDAV Account role: SPARQL_UPDATE

Click "Save". The created user should be shown in the list of registered users:

Go to http://<cname>:<port>/oauth/, where <cname>:<port> are replaced by your local server values.

Click the "OAuth Keys" link:

Log in as user demo1:

The OAuth application registration form will be shown.

Select SPARQL from the "Application name" list, and click the "Generate Keys" button. A Consumer Key for SPARQL will be generated: 90baa79108b1d972525bacc76c0279c02d6421e8

Click the "Back to main menu" link.

Click the "Protected SPARQL Endpoint" link. The OpenLink Virtuoso SPARQL Query form will be shown:

Enter a simple query, for ex: SELECT * WHERE { ?s ?p ?o } LIMIT 10 For "OAuth token", enter the Consumer Key value which was generated above, i.e., 90baa79108b1d972525bacc76c0279c02d6421e8

Click the "Run Query" button. In the OAuth Authorization Service form, enter the password for user demo1 and click the "Login" button.

Next you should authorize the request:

On successful authentication and authorization, the query results should be shown:

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