> This page is for Schema Service, version v3 (latest) (default).
> For other versions, use one of these documentation indexes:
> - v3 (latest) (default): https://autodesk.ferndocs.com/schema/schema-service/v3/llms.txt
> - v2: https://autodesk.ferndocs.com/schema/schema-service/v2/llms.txt

> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://autodesk.ferndocs.com/schema/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://autodesk.ferndocs.com/schema/_mcp/server.

# Task 1 - Obtain a 2-Legged Access Token

## Expected task outcome

By the end of this task, you will know how to use Postman to obtain a two-legged access token.

Step 1 - Update Postman Variables

1. In Postman, click the **Environment Quick Look** button. A list of Environment Variables display.

![fssv3\_tutorial\_1\_environment\_quick\_view.png](/schema/_fern-img/5ee25b5c4c651b1e8473d8054145491782db23474ca0161146dc656ec8c60004.webp)

2. In the Environment Variables list, set the **su_client_id** and **su_client_secret** environment variables to the Client ID and Client Secret you noted down earlier.

![fssv3\_tutorial\_1\_enter\_variable\_values.png](/schema/_fern-img/fa59a4bb268bb9c7621110e3c970a24d741c0fc05216eec018a8ded877ab8050.webp)

Step 2 - Obtain Access Token

1. In Postman, on the Sidebar, select the Postman Collection **FSS V3 Tutorial 1**.
2. In the centre area, click the **Authorization** tab. The Authorization tab displays.

![fssv3\_tutorial\_1\_authorization.png](/schema/_fern-img/41018cd6d861029e2eb7b1837a77bc2e28fb1fb64b55f218add48a517c006ecc.webp)

3. In the Authorization tab, scroll down to the Configure New Token section and click **Get New Access Token**.

![fssv3\_tutorial\_1\_get\_new\_access\_token.png](/schema/_fern-img/20ca3db3675d8d796724e11495365eed387a06c92969610418adad9c0a609e56.webp)

4. In the **Manage Access Tokens** screen that is displayed after you successfully authorize, click **Use Token**.

![fssv3\_tutorial\_1\_use\_access\_token.png](/schema/_fern-img/6412fdffc97335a2e4d8293629bb31bc1ad5ce58eefe4d63b2ed025b8d562af0.webp)