# API Reference
source: https://developer.mastercard.com/carbon-calculator/documentation/api-reference/index.md

## Environment Domains {#environment-domains}

* Sandbox
* Production

```Sandbox
https://sandbox.api.mastercard.com/carbon
```

```Production
https://api.mastercard.com/carbon
```

## APIs {#apis}


API Specification: `https://static.developer.mastercard.com/content/carbon-calculator/swagger/sustainability-services.yaml`

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API Specification: `https://static.developer.mastercard.com/content/carbon-calculator/swagger/engagement-services.yaml`

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## Next Steps {#next-steps}

Now that you have a good understanding of all the services endpoints, proceed to the Integration and Testing section to learn how to integrate and make sure you are ready to begin testing.