Aviz Networks examines packet-level visibility for API security in financial services
Financial services organizations rely on APIs that attackers can exploit, but many teams lack complete visibility into what APIs are actually running. The blog argues that packet-level network visibility provides independent, packet-derived evidence to help CISOs find shadow APIs, validate encryption, and detect abnormal activity.
Research Overview
The blog describes APIs as a core integration mechanism across banks, insurers, payment platforms, partners, cloud workloads, and AI tools. It states that API exposure increases risk from credential abuse, data theft, and unauthorized third-party access.
It also notes that many institutions use controls such as WAFs, gateways, and API security platforms, while still missing internal, outdated, or shadow APIs. The stated goal is to close these gaps using network-level, packet-derived evidence.
Key Findings
The blog frames API security challenges around incomplete visibility beyond known, cataloged endpoints. It says existing tools often rely on known API definitions, configured paths, or application logs, which can leave internal service-to-service calls and legacy versions unobserved.
It further states that packet-level visibility provides an independent view of every API call across the network, enabling automated API discovery and real-time behavior tracking. The blog positions this evidence as support for controls that rely on security telemetry, including WAFs, gateways, SIEM, NDR, and API security platforms.
Technical Breakdown
According to the blog, packet-level analysis can validate TLS and certificate health by examining network traffic directly. It contrasts this with the idea that some tools rely on configuration status rather than confirming encryption and certificate properties from the packets.
The blog states that packet-derived data can identify expired certificates, weak cipher suites, and unencrypted API calls in the traffic. It also says this approach can detect unusual API activity, such as abnormal call volumes or unexpected endpoint queries.
Operational Impact
The blog describes use cases tied to enterprise security operations, including discovering shadow APIs, monitoring real-time traffic, and identifying outbound connections to third-party and AI services. It states that packet visibility can show when services connect to external destinations they did not previously access.
It also links these capabilities to earlier detection of abnormal patterns before they escalate into incidents. In its discussion of governance, it says packet-derived evidence helps improve alerting when existing systems operate from incomplete internal and shadow traffic inventories.
Overall, the blog’s central position is that API security in financial services requires visibility into internal traffic, shadow APIs, encryption status, and outbound calls to third parties and AI services. It presents packet-level observability as a method for generating packet-derived evidence that supports existing security controls for defenders managing API risk; this “Blog Signals brief” is a fact-based summary of the vendor blog.