Mexico’s Unique Identity Platform (PUI) is not a module that a financial institution simply switches on. It requires secure, always-available infrastructure that can receive requests, search customer records, and return results in real time.

This guide explains the technical foundations needed to integrate Mexico’s PUI without disrupting your current financial system.

What a PUI integration actually requires

The operating model reverses the usual government-data query: authorized public infrastructure connects to the institution’s systems. Your platform must expose reliable endpoints, automate searches, protect sensitive information, and preserve evidence for regulatory review.

Technical checklist for PUI integration

1. Highly available APIs

• Endpoints available 24/7
• Redundancy and fault tolerance
• Capacity to scale during concurrent requests

2. Authentication and data security

• Token-based authentication such as JWT
• Encryption in transit and at rest
• Secure credential rotation and access controls

3. Required workflows

The platform must support authentication, report activation and deactivation, match notifications, and completion notices. Each workflow should be idempotent, monitored, and documented.

4. Historical data search

The search layer should locate customer information by CURP, analyze historical records for the required period, and identify matches quickly without manual intervention.

5. Continuous monitoring

Automated searches must run at the required frequency until the case is closed. Alerts, retries, and service-level indicators help prevent silent failures.

6. Logs and auditability

Record every request, response, status change, and operator action. Complete traceability supports CNBV compliance and accelerates incident analysis.

Common implementation mistakes

Institutions often underestimate availability requirements, rely on recent data only, introduce manual steps, or attempt to connect legacy systems that were never designed for APIs. These gaps increase cost and compliance risk.

Build or integrate?

Building from scratch offers control but demands specialized teams, months of development, ongoing maintenance, and extensive validation. Integrating an established platform can shorten implementation, reduce operational burden, and provide a proven compliance architecture.

The role of an API-first core

A modern core banking platform should support APIs, automation, regulatory integrations, and observability. Dynamicore incorporates the PUI connection into its platform so institutions can coordinate identity, AML, onboarding, and monitoring in one operating flow.

Choosing modern financial technology helps institutions meet technical requirements while protecting service continuity and focusing their teams on the business.

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