> ## Documentation Index > Fetch the complete documentation index at: https://nango.dev/docs/llms.txt > Use this file to discover all available pages before exploring further. # Transporeon Carrier Interface - How do I link my account? # Overview To authenticate with the Transporeon Carrier Interface API, you need: 1. **Username** - in the format `username@companyId`. 2. **Password** - your Transporeon account password. 3. **API Host** - which Transporeon Carrier Interface host to connect to: `xp.transporeon.com` (production) or `xp.test.transporeon.com` (test). Use `xp.transporeon.com` for the public sandbox. ### Instructions: #### Step 1: Obtaining your credentials 1. Request API access from Transporeon (contact your Transporeon/Trimble account team), or use the public sandbox to test connectivity first. 2. Transporeon provisions a **Username** (in the format `username@companyId`, where `username` identifies your API client and `companyId` identifies your carrier account) and a **Password**. #### Step 2: Selecting your API host Transporeon runs separate production and test environments, each with its own API host: * **API Host** - `xp.transporeon.com` (production, and the public sandbox) or `xp.test.transporeon.com` (test). Pick the host matching the environment your Username and Password were issued for. #### Step 3: Enter credentials in the Connect UI Once you have your **Username**, **Password**, and **API Host**: 1. Open the form where you need to authenticate with Transporeon. 2. Enter your **Username** in its designated field. 3. Enter your **Password** in its designated field. 4. Select the **API Host** matching your credentials' environment. 5. Submit the form, and you should be successfully authenticated. You are now connected to the Transporeon Carrier Interface.