RELATED CONCEPT
Mutual TLS
Mutual Transport Layer Security (mTLS) is a cryptographic protocol where both client and server authenticate each other using digital X.509 certificates before establishing an encrypted tunnel.
FINANCIAL INFRASTRUCTURE CONCEPT
API Gateway
An API gateway is a specialized server management layer that acts as the single reverse-proxy entry point for all client applications accessing back-end banking microservices.
Architectural context & analysis
It centralizes cross-cutting institutional concerns including mTLS termination, OAuth2/JWT token validation, dynamic rate limiting, schema verification, request routing, and metric telemetry.
By enforcing these security policies at the ingress perimeter, the gateway shields core banking databases and transaction engines from unauthorized exposure.
Worked operational scenario
An API gateway intercepts 50,000 incoming account balance requests, validates client signatures, checks rate-limit quotas, and distributes traffic across back-end read replicas.
Implementation considerations & controls
Deploy API gateways in active-active configurations across separate physical availability zones with automated health checks and instant circuit-breaker protections.
CONCEPTUAL RELATIONSHIPS
Related concepts
RELATED CONCEPT
Idempotency
Idempotency is an API and system design property where executing an operation multiple identical times produces the exact same state and result as executing it once.
RELATED CONCEPT
Payment Gateway
A payment gateway is an ingress integration component that securely receives, validates, inspects, and routes financial payment instructions between client channels and processing processors.
AN INFORMED NEXT STEP
Establish clear operational parameters for API Gateway.
Start with your architecture, integration boundaries and operational requirements.