CISO's Guide to API Security in Financial Services

APIs now sit at the center of every financial system. They connect banks, insurers, payment platforms, partners, and cloud services. They also happen to be one of the most attacked parts of modern infrastructure.

Most security teams already use WAFs, gateways, and API security tools. The gap is visibility. Many organizations still don't know how many APIs they actually have, which ones handle sensitive data, or what is really happening on them in real time.

This guide explains how packet-level network visibility helps close that gap. It shows how security teams can see every API call, including internal service-to-service traffic, older API versions, shadow APIs, and outbound calls to third-party and AI services.

Built for CISOs in financial services, the guide explains how Aviz Networks Deep Network Observability provides clear, independent evidence that strengthens existing API controls instead of replacing them.

Key Highlights

• Discover all APIs automatically, including shadow and outdated versions
• See real-time API behavior, not just gateway or application logs
• Prove TLS, certificates, and encryption across every API endpoint
• Detect credential abuse, scraping, and abnormal API traffic early
• Track outbound APIs and AI service usage across the network

If APIs are critical to your business, visibility is no longer optional. Download the guide to see how network-level evidence supports stronger, more defensible API security.

Tags: Security, Networking, ONEs