# API Reference
source: https://developer.mastercard.com/straight-through-processing/documentation/api-reference/index.md

## Environment domains {#environment-domains}

* Sandbox
* Production

```Sandbox
https://sandbox.api.mastercard.com/stp-api/v1 
```

```Production
https://api.mastercard.com/stp-api/v1 
```

Note: MTF and Sandbox environments use the same key.

## APIs {#apis}


API Specification: `https://static.developer.mastercard.com/content/straight-through-processing/swagger/stp-api.yaml`