EMS Legacy: Obtain Access Token

To connect to the EMS API, you need to include a TID OAuth authentication token in the API request header.

A valid token is required. If a token is expired, you will not be able to connect to EMS. Ensure you are sending the correct, active token with your API calls.

To generate an access token:

From API Cloud, under My Applications, navigate to the EMS application.
Base 64 encode your access keys:
```
Consumer Key:Consumer Secret
```

To get an access token, use one of the following endpoints:

STG:

POST https://identity-stg.trimble.com/token

PROD:
```
POST https://identity.trimble.com/token
```

In the header include:
- Key: Authorization
- Value: Basic {base 64 string}
- Content-Type: application/x-www-form-urlencoded
In the body include:
```
grant_type=client_credentials
```

The JSON response will include the access token for the EMS API:

Example:

{
    "access_token": "k0fyy384f2009f69xxx24e288c5fac69",
    "token_type": "Bearer",
    "expires_in": 48188
}

For detailed information on generating a Trimble Identity access token, see the API Cloud documentation.