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# Register Merchant

Register a merchant and its corresponding set of fully qualified domains.

## Discussion

Call this API to register a merchant and their domains. You can register domains in multiple requests. The API has a limit of 99 domain names per `partnerInternalMerchantIdentifier.`

Before making a [`Register Merchant`](/documentation/ApplePayWebMerchantRegistrationAPI/Register-Merchant) request, you must prepare each domain included in the request for verification. For more information on domain verification, see [Preparing merchant domains for verification](/documentation/ApplePayWebMerchantRegistrationAPI/preparing-merchant-domains-for-verification).

This request returns no response body for a successful 200 response. Apple Pay servers register the relationship between the e-commerce partner, the merchant, and the merchant’s domains.

> Note:
> To access the sandbox environment, use `POST` `https://apple-pay-gateway-cert.apple.com/paymentservices/registerMerchant`.

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