---
title: MerchantTokenUsageMetadata
framework: Apple Pay Merchant Token Management API
role: symbol
role_heading: Object
platforms: [apple pay merchant token management api 1.0.12+]
path: merchanttokennotificationservices/merchanttokenusagemetadata
---

# MerchantTokenUsageMetadata

Metadata about where and how to retrieve the latest usage information.

## Declaration

```data
object MerchantTokenUsageMetadata
```

## Properties

ciphersuite: The cipher suite used for HPKE in authorization mode. Use the value sent as supportedCiphersuite in the Retrieve MerchantToken PublicKey API response. data: Metadata encyrpted using the merchant token public key. ephemeralPublicKey: The ephemeral public key in X9.63 representation, Base64-encoded. infoHash: A SHA-256 digest of the info, hex-encoded. merchantPublicKey: The merchantPublicKey in X9.63 representation, Base64-encoded. merchantTokenPublicKeyHash: An SHA-256 digest of the merchantTokenPublicKey, hex-encoded.

## Discussion

Discussion The merchantPublicKey includes encrypted metadata. When decrypted, you get a data JSON object that contains the webServiceURL of the merchant server, which hosts the usage information, and an opaque authenticationToken. The user’s devices present the authenticationToken when retrieving the latest usage information from the merchant server. This allows the merchant server to authenticate these requests.