When a payment API connects merchants to multiple payment providers, determining the relevant security requirements takes more than looking at the product description. The important questions are what data moves through the platform, which systems interact with payment infrastructure, and what access the service has to the cardholder data environment.
These details influence whether PCI DSS applies and what a prospective bank may expect from a SOC 2 report.
Map the Payment Architecture First
Consider a payment orchestration service that accepts transaction requests from merchants and routes them to different payment providers. The architecture may include API gateways, merchant dashboards, transaction logs, authentication services, cloud infrastructure, and third-party integrations.
Each component should be evaluated according to its actual role. Does it store, process, or transmit payment card account data? Can it affect the security of a cardholder data environment? Which external services can access it?
These questions matter because PCI DSS scope is not limited to systems that directly store cardholder data. Certain service providers can fall within scope because their services affect payment account data security.
A hosted payment page, redirect, or tokenisation service does not automatically determine the final scope. The full integration and data flow need to be considered.
Where SOC 2 Fits
SOC 2 examines controls within a service organisation’s defined system against the applicable Trust Services Criteria. For a payment API provider, the examination may cover controls relating to access management, change management, monitoring, incident response, and other areas within the agreed scope.
Security is included in every SOC 2 examination. Other criteria may be included depending on the engagement. A Type I report evaluates control design at a specified date, while a Type II report also examines operating effectiveness over a defined period.
A bank may request SOC 2 evidence to evaluate the provider’s broader technology controls. However, the report’s scope must cover the services relevant to the proposed relationship.
Why the Evidence Must Stay Separate
SOC 2 and PCI DSS can examine overlapping security practices, but they are not interchangeable. A control appearing in a SOC 2 report does not automatically establish that the corresponding PCI DSS requirement has been met.
Teams reviewing payment architecture can refer to the PCI DSS assessment services overview for the payment card security assessment context.
A Technical Review Checklist
Before a bank or payment partner reviews the platform, the team should document:
The path payment data follows through APIs and connected services.
Systems that store, process, or transmit account data.
Components and providers that can affect cardholder data security.
Access permissions for internal teams and external providers.
The systems covered by the SOC 2 report.
The PCI DSS validation and reporting evidence required by the relevant partner.
Mapping the architecture first creates a clearer basis for defining assessment scope. It also reduces the risk of assuming that a particular integration model automatically removes PCI DSS obligations or that a SOC 2 report covers every payment security requirement.
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