# Merchant Transactions API
source: https://developer.mastercard.com/consumer-clarity/documentation/merchant-transactions-api/index.md

## Overview {#overview}

All Merchants and Merchant Partners must integrate with the Merchant Transactions API. The Merchant Transactions API Integration Guide provides you with the information you need to implement the API and make your data accessible to the issuer or customer.

One of the requirements for integrating with the Merchant Transactions API is creating an HMAC signature. You can download both the integration guide and instructions for creating your HMAC signature by following the links provided here:

* [Merchant Transactions API Integration Guide](https://static.developer.mastercard.com/content/consumer-clarity/uploads/ethoca-merchant-digital-api-integration-guide.pdf)
* [Instructions for creating an HMAC signature](https://static.developer.mastercard.com/content/consumer-clarity/uploads/create-hmac-signature.txt)

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For more information about the Merchant Transactions API, the guide, or how to get started, contact the [Ethoca Customer Delivery Team](mailto:customerdelivery@ethoca.com).