Connecting Ecobank Guinea to NimbaPay: Inside the Integration

A national instant payment system only matters once institutions are actually connected to it. When the Central Bank of the Republic of Guinea launched NimbaPay on 22 July 2026, the question for every bank in the market became a practical one: how quickly can our core banking platform speak the switch's language, safely, and without disrupting everything already running on it?

Ecobank Guinea trusted BCT Corp with that work. Our teams designed and deployed the secure interface linking the bank's systems to the national switch, and Ecobank Guinea is now among the first institutions live on NimbaPay.

Connecting a bank to an instant payment scheme is not a single API call. It is a translation layer that has to hold two very different worlds in agreement: a core banking platform built around batch posting, business hours and its own account model, and a switch that expects a correct answer in under a second, at any hour, in a standard message format.

The interface we built for Ecobank Guinea covers three capabilities that customers experience directly:

The parts customers never see are where integration work is won or lost. A switch transaction has a strict timeout; a core banking platform occasionally does not. That mismatch has to be resolved deliberately rather than discovered in production, which means explicit timeout budgets, idempotent posting so a retried request never debits twice, and a reconciliation path for the small number of transactions that end in genuine ambiguity.

Security is handled at the same level of care. Traffic between the bank and the switch is mutually authenticated and encrypted, credentials are rotated rather than embedded, and every transaction carries an audit trail that can be reconstructed end to end — a requirement for the bank's own controls as much as the scheme's.

Then there is the unglamorous discipline of operations: health checks that mean something, logs that make an incident diagnosable at three in the morning, and runbooks written before they are needed rather than after.

Integration work of this kind is not a one-off delivery that ends at go-live. Schemes evolve, message versions change, volumes grow and new use cases arrive. An institution that depends on a team several time zones away for every change carries an operational risk that compounds quietly.

BCT Corp builds and maintains these connections with teams in-country, and trains local integrators as part of the work. That model is deliberate: open standards make the interface portable, and local capacity makes it sustainable.

As a listed Mojaloop Service Provider, we do this work for banks, mobile money providers, microfinance institutions and fintechs — in Guinea and across the continent.