RELATED 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.
FINANCIAL INFRASTRUCTURE 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.
Architectural context & analysis
Gateways handle transport layer encryption, API schema validation, authentication token verification, rate limiting, and basic fraud heuristics.
A gateway acts as a protocol translation and protection boundary; it does not independently hold customer balances or execute final bank balance settlement.
Worked operational scenario
An e-commerce gateway intercepts customer checkout payloads, tokenizes cardholder credentials, and invokes bank settlement APIs via HTTPS.
Implementation considerations & controls
Isolate gateway instances in hardened DMZ zones and avoid logging sensitive cardholder or account identifiers to maintain PCI-DSS Level 1 compliance.
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
Settlement Rails
Settlement rails are the foundational institutional networks, central bank channels, and rulebooks through which legal monetary transfer and final obligations are discharged between entities.
AN INFORMED NEXT STEP
Establish clear operational parameters for Payment Gateway.
Start with your architecture, integration boundaries and operational requirements.