# Integration and Testing
source: https://developer.mastercard.com/carbon-calculator-china/documentation/integration-and-testing/index.md

To start using the Carbon Calculator API, you must first create a project, **and then add the API to it**.

* To create a sandbox project, follow the steps mentioned in the \[Create a Sandbox Project\] in Tutorials.
* Once access is granted, by using the **view service provider details API** in the Sandbox environment, you can test authentication and validate your connectivity.
* Also do end-to-end integration testing based on your integration model in this environment before moving to production.

Follow these steps for **\[integration and testing\]** in the tutorials to test the API.

Once you are ready to go live, follow these steps to **request your production access**. A contractual agreement needs to be signed before your production access is approved, and you can access the APIs.

**Tip:If you do not have a Mastercard representative, send a request to [carboncalculator@mastercard.com](mailto:carboncalculator@mastercard.com) for further help.**

## My questions {#my-questions}

1. Does the China customer use the APIs? If not, what must they do after they have created the CC Project.
2. Does the China customer use the **view service provider details API** to test authentication?
3. The steps to Create a Sandbox Project is provided in the Quick Start Guide. Please suggest modifications applicable to China.
4. Please provide the **Integration and Testing** details as they will test on Sandbox:
   1. NGFT implementation
   2. GFT implementation
   3. Sample transactions file that they can upload manually or will be pushed by the Sandbox env for the issuers to score.
   4. Sample scored file to download from both NGFT and GFT.
5. If you want to give a **Reference Application**, please provide the application.