# API Reference
source: https://developer.mastercard.com/benefit-allocation-service-mtls/documentation/api-reference/index.md

## Environment Domains {#environment-domains}

* Sandbox
* MTF
* Production

```Sandbox
https://mtf.services.mastercard.com/loyalty/benefits/sandbox
```

```MTF
https://mtf.services.mastercard.com/loyalty/benefits
```

```Production
https://services.mastercard.com/loyalty/benefits
```

## APIs {#apis}


API Specification: `https://static.developer.mastercard.com/content/benefit-allocation-service-mtls/swagger/spec-benefit-allocations.yaml`

### Next Steps {#next-steps}

* Follow the [Testing guide](https://developer.mastercard.com/benefit-allocation-service-mtls/documentation/testing/index.md) to validate your integration in Sandbox and MTF.
* Review the [Use Cases](https://developer.mastercard.com/benefit-allocation-service-mtls/documentation/use-cases/index.md) for end-to-end operation flows.
* See [Code and Formats](https://developer.mastercard.com/benefit-allocation-service-mtls/documentation/code-and-formats/index.md) to interpret response and error codes.