Before You Begin
Step 1 - Register an App
If you do not have an app registered for the Manufacturing Data Model API, follow the instructions in the tutorial to Create an App . When specifying details of the app:
- Verify that the Manufacturing Data Model API and Webhooks API are selected under API Access.
- Specify
http://localhost:8080/callback/oauth
for the Callback URL.
Step 2 - Sign in to the Manufacturing Data Model Explorer
The Manufacturing Data Model Explorer is a real-time introspection tool for testing GraphQL queries and responses. As this is a web-based service, it does not require any installation and works only with Autodesk-registered user profiles.
- Browse to the Manufacturing Data Model Explorer.
- Enter your Autodesk credentials and click Next.
After signing in, you should see a screen like the following image.
![../../../_images/before_you_begin-031.png](https://developer.doc.autodesk.com/bPlouYTd/forge-pim-graphql-docs-master-389316/_images/before_you_begin-031.png)