As Temenos environments become more open and more integrated, the API layer has quietly become one of the most consequential parts of the bank's security posture.

Inventory before you assess

You cannot secure what you cannot see. The first deliverable of any API security engagement is a complete inventory — including the shadow integrations that often outnumber the documented ones.

Authentication is not enough

Strong authentication only proves who is calling. Authorization, rate limiting, schema validation and anomaly detection are what stop a compromised credential from becoming a breach.

Test like an adversary, not an auditor

Compliance-driven testing finds compliance gaps. Adversary-simulation testing finds the gaps that matter. The two are complementary — but only one of them reflects how you will actually be attacked.