Aviz Networks Deep Network Observability details packet-level API visibility

Financial services organizations face gaps in API visibility, leaving some endpoints unmonitored and increasing exposure to credential abuse and data theft. A vendor argues that packet-level network visibility can provide independent evidence for discovering shadow APIs, validating TLS, and spotting anomalous API behavior.

Research Overview

The post describes APIs as a connective layer across banking, insurance, payment systems, partners, cloud workloads, and AI services. It notes that while many institutions deploy WAFs, gateways, and API security platforms, these tools may not cover internal traffic, outdated implementations, or APIs not accounted for in existing inventories or logs.

The vendor frames the update around how packet-level visibility can help CISOs close those gaps by observing traffic directly and using that data as supporting evidence for existing security controls.

Key Findings

The blog states that financial services APIs are business-critical and targeted, with common attack paths including credential abuse, data scraping, and unauthorized access. It says incomplete API visibility can result in security teams missing legacy API versions, unknown endpoints, sensitive data flows, and abnormal usage patterns.

It also argues that the limitations extend beyond external-facing controls, because shadow APIs and internal service-to-service calls can sit outside what gateways and application logs cover, leaving governance and monitoring uneven.

Technical Breakdown

The post describes packet-level visibility as an approach that analyzes network traffic for every API call observed across the network. It links this to automated API discovery, real-time tracking of behavior, and validation of TLS and certificate health through observed network characteristics.

According to the blog, this traffic-derived evidence can also help detect unusual API activity earlier by identifying patterns such as unexpected endpoint queries and abnormal call volumes before incidents are escalated.

Operational Impact

The blog says packet-derived visibility can strengthen existing tools by providing more complete inputs for WAFs, gateways, SIEM, NDR, and API security platforms. It states that when these systems operate with incomplete inventories, alerts can miss activity that occurs outside known or registered APIs.

For third-party and AI service risk, the post describes API connections as carrying data outside the organization and says packet-level visibility helps show which external services receive data, whether connections are encrypted, and whether traffic appears consistent with expected patterns.

Overall, the post’s message is that API security in financial services depends on visibility into internal traffic, shadow APIs, encryption status, and outbound third-party and AI service calls. This Blog Signals brief is a fact-based summary of the vendor blog.