# Use Cases
source: https://developer.mastercard.com/mastercard-threat-intelligence/documentation/use-cases/index.md

![Card testing](https://static.developer.mastercard.com/content/mastercard-threat-intelligence/uploads/card-testing-use-case.svg)
Card Testing API   

Issuers can use Card Testing to investigate payment card activity associated with card testing patterns. The service provides transaction-level visibility that helps fraud operations teams identify potentially impacted account ranges, assess exposure within their portfolio, and support risk monitoring and investigative workflows. Data can be filtered and analyzed based on issuer-specific attributes such as BIN and ICA.
Investigate Card Testing as an Issuer

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Acquirers can use Card Testing to identify merchants within their portfolio that exhibit observed card testing activity or testing behaviors commonly associated with card testing. These insights help merchant risk and fraud teams investigate suspicious activity, assess potential impacts, and engage merchants on measures to reduce exposure to card testing attempts.
Investigate Card Testing as an Acquirer ![Merchant Threat Intelligence](https://static.developer.mastercard.com/content/mastercard-threat-intelligence/uploads/merchant-threat-intelligence-use-case.svg)
Merchant Threat Intelligence API   
Issuers can use Merchant Threat Intelligence's Merchant Domain Inquiry to retrieve threat intelligence information associated with merchant domains. These insights can support fraud investigations, merchant risk assessments, and broader analysis of merchant-related activity observed across the payment ecosystem.   

Acquirers can incorporate merchant domain intelligence into merchant review and risk assessment processes. The service provides additional context that can help identify domains associated with elevated risk indicators or suspicious activity patterns.

They can also use Merchant Domain Inquiry to monitor merchant domains over time, helping risk teams identify changes in observed threat indicators and support ongoing merchant portfolio oversight.
Assess Merchant Domain Inquiry ![Payment Ecosystem Threat Intelligence](https://static.developer.mastercard.com/content/mastercard-threat-intelligence/uploads/peti-vulnerabilities-use-case.svg)
Payment Ecosystem Threat Intelligence - High Risk Vulnerabilities API   
Issuers and Acquirers can use Payment Ecosystem Threat Intelligence high risk vulnerabilities to access intelligence related to vulnerabilities affecting e-commerce platforms, payment technologies, and other payment ecosystem products. These insights can support security assessments, risk analysis, and investigation workflows.   

Acquirers can use the vulnerabilities intelligence to identify vulnerabilities associated with technologies and products relevant to their merchant portfolio, helping provide additional context for risk evaluation and operational decision-making.   

Identify High-risk Software Vulnerabilities

## Next Steps {#next-steps}

* Review the [API Reference](https://developer.mastercard.com/mastercard-threat-intelligence/documentation/api-reference/index.md) to explore the available endpoints and download the OpenAPI (Swagger) specification for integration.