# Single Search
source: https://developer.mastercard.com/merchant-match-tool/documentation/usecases/case-1/index.md

The solution includes two APIs -- one to handle single query search requests and another for multiple query search requests. Each client will have its own API-key for authentication which will be provided as the part of client onboarding process. For further details, please refer to the [API Reference](https://developer.mastercard.com/merchant-match-tool/documentation/api-reference/) page or view [Codes and Formats](https://developer.mastercard.com/merchant-match-tool/documentation/code-and-formats/)

#### Single-search {#single-search}

A sales executive, account manager or analyst may need to look up a single Supplier from Mastercard acceptance database during a client meeting in near real time to validate if the Supplier accepts Mastercard cards. There can be 5 concurrent requests per client (could accommodate additional 10 requests in the queue per client) for single search API.

The following example sequence shows how you might use the single-search API
Diagram singlesearch

[Single Searches API](https://developer.mastercard.com/drafts/merchant-match-tool/staging/documentation/api-reference/#apis) POST request to query for a single Supplier (view supported parameters [here](https://developer.mastercard.com/drafts/merchant-match-tool/staging/documentation/parameters/#single-api))

API Reference: `POST /single-searches`