# Using RDF4J Workbench to connect to a Neptune DB instance
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This section walks you through connecting to an Amazon Neptune DB instance using RDF4J Workbench and RDF4J Server. RDF4J Server is required because it acts as a proxy between the Neptune SPARQL HTTP REST endpoint and RDF4J Workbench. 

RDF4J Workbench provides an easy interface for experimenting with a graph, including loading local files. For information, see the [Add section](https://rdf4j.org/documentation/tools/server-workbench/#add) in the RDF4J documentation.

**Prerequisites**  
Before you begin, do the following:
+ Install Java 1.8 or later.
+ Install RDF4J Server and RDF4J Workbench. For information, see [Installing RDF4J Server and RDF4J Workbench](https://rdf4j.org/documentation/tools/server-workbench/#installing-rdf4j-server-and-rdf4j-workbench).

**To use RDF4J Workbench to connect to Neptune**

1. In a web browser, navigate to the URL where the RDF4J Workbench web app is deployed. For example, if you are using Apache Tomcat, the URL is: [https://*ec2\$1hostname*:8080/rdf4j-workbench/](http://localhost:8080/rdf4j-workbench/).

1. If you are asked to **Connect to RDF4J Server**, verify that **RDF4J Server** is installed, running, and that the server URL is correct. Then, proceed to the next step.

1. In the left pane, choose **New repository**.

   In **New repository**:
   + In the **Type** drop-down list, choose **SPARQL endpoint proxy**.
   + For **ID**, type **neptune**.
   + For **Title**, type **Neptune DB instance**.

   Choose **Next**.

1. In **New repository**:
   + For **SPARQL query endpoint URL**, type `https://your-neptune-endpoint:port/sparql`.
   + For **SPARQL update endpoint URL**, type `https://your-neptune-endpoint:port/sparql`.

   For information about finding the address of your Neptune DB instance, see the [Connecting to Amazon Neptune Endpoints](feature-overview-endpoints.md) section. 

   Choose **Create**.

1. The **neptune** repository now appears in the list of repositories. It might take a few minutes before you can use the new repository.

1. In the **Id** column of the table, choose the **neptune** link.

1. In the left pane, choose **Query**. 

    
**Note**  
If the menu items under **Explore** are disabled, you might need to reconnect to the RDF4J Server and choose the **neptune** repository again.  
You can do this by using the **[change]** links in the upper-right corner.

1. In the query field, type the following SPARQL query, and then choose **Execute**.

    

   ```
   select ?s ?p ?o where {?s ?p ?o} limit 10
   ```

    

The preceding example returns up to 10 of the triples (subject-predicate-object) in the graph by using the `?s ?p ?o` query with a limit of 10.