Many organizations protect APIs with HTTPS, firewalls, VPNs, and API gateways.

Those controls are important, but they do not automatically stop authorization failures inside an application.

A user may be authenticated correctly and still access data they should not be allowed to see if object-level authorization is missing.

For example: a customer can view their own order history. But can they change the order ID in an API request and retrieve another customer’s order?

That is where API security becomes more than a network security issue.

A practical API security strategy should include:

• API discovery and ownership

• Authentication and token management

• Object-level authorization checks

• Rate limiting and request quotas

• API version control

• Logging and runtime monitoring

• Secure retirement of old endpoints

What is the biggest API security challenge in your environment: visibility, authentication, authorization, legacy APIs, or monitoring?