# API Reference
source: https://developer.mastercard.com/bill-payment-validator/documentation/api-reference/index.md

## Environment Domains {#environment-domains}

Bill Payment Validator

```MTF
https://api.mastercard.com/billpayAPI/v1/mtf/isRoutingValid
```

```Sandbox
https://sandbox.api.mastercard.com/billpayAPI/v1/isRoutingValid
```

```Production
https://api.mastercard.com/billpayAPI/v1/isRoutingValid
```

## APIs {#apis}

### Swagger Definition {#swagger-definition}

> The Bill Payment validator API Reference is available to view and download in Swagger (yaml) form, including example requests and responses.

API Specification: `https://static.developer.mastercard.com/content/bill-payment-validator/swagger/bill-payment-validator.yaml`