API-Led Connectivity for Gateways, Acquirers, and Core Banking: Idempotency, Security, and Observability Patterns

Authors: Ravi Kumar Vallemoni

DOI: https://doi.org/10.37082/IJIRMPS.v9.i1.232850

Short DOI: https://doi.org/hbd6hr

Country: United States

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Abstract: The new financial ecosystem requires robust, safe and visible APIs to link payment engines, acquirers and core banking frameworks. The given paper examines API-based connectivity patterns, which focus on idempotency, security, and observability, in the context of the payments integration standards that may be adapted to scalable banking practices. The main challenges that are solved are the task of dealing with duplicate transactions, secure communication in OAuth2 and JWT, traceability with the help of distributed tracing, and operational metrics such as Mean Time to Detect (MTTD) and Mean Time to Recover (MTTR). The paper describes persistent API specifications including idempotency keys, structured error scheme, paging techniques, and HATEOAS. The architecture, reference OpenAPI specifications, logging patterns, and observability instrumentation are also described in the methodology section. The simulation has shown there are a set of reduced transaction duplications, constant transactions per second (TPS), reduced partner onboarding, as well as quantifiable system reliability. This study is practical advice to banks, fintechs, and payment processors who are interested in using enterprise-grade API architecture, which balances technical and business flexibility.

Keywords: API-led connectivity, idempotency, OAuth2, JWT, HATEOAS, distributed tracing, observability, payments, banking, TPS, MTTD, MTTR, structured logging.

Paper Id: 232850

Published On: 2021-01-05

Published In: Volume 9, Issue 1, January-February 2021

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