Will the API layer slow down our legacy system?

We design the API layer to minimize impact -- read replicas for queries, connection pooling, caching, and rate limiting. Most legacy systems handle API traffic with no noticeable performance impact.

Can this work with AS/400 (IBM i)?

Yes. We build APIs on top of AS/400 using ODBC/JDBC connections to DB2/400, data queues, program calls, and IFS file interfaces. Your AS/400 data becomes accessible via standard REST APIs.

Is this a permanent solution or just a bridge?

It can be either. Some organizations use the API layer as a permanent integration strategy. Others use it as a bridge during phased migration -- decoupling consumers from the legacy system so it can be replaced without disrupting integrations.

What about write operations back to the legacy system?

We support both read and write APIs. Write operations use the legacy system\'s own transaction mechanisms (stored procedures, program calls) to ensure data integrity and business rule enforcement.

Legacy Modernization · API Development

Unlock your legacy data without replacing the system.

Your legacy system holds critical data that modern applications need -- but it has no APIs, no webhooks, and no modern integration points. We build a REST/GraphQL API layer on top of your legacy system so new applications can access data without touching the core.

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The Problem

Legacy Systems Are Data Prisons

✕Modern applications can\'t integrate because the legacy system has no APIs or web services

✕Data extraction requires custom file exports, screen scraping, or direct database queries

✕Every new project requires a bespoke integration that takes weeks and is fragile to maintain

✕The data you need for BI, automation, and customer portals is locked inside a system that can\'t share it

What We Deliver

Service Scope

RESTful API Design

Clean, documented REST APIs that expose legacy data and operations. Standard HTTP methods, JSON responses, and OpenAPI/Swagger documentation.

Data Abstraction

Abstract legacy data models into modern, clean interfaces. Consumers see logical business objects, not cryptic legacy table structures.

Real-Time & Batch

Real-time APIs for transactional operations plus batch endpoints for bulk data extraction. Match the integration pattern to the use case.

Authentication & Authorization

OAuth 2.0, API keys, and role-based access control. Secure access to legacy data with modern security standards.

Rate Limiting & Caching

Protect legacy systems from being overwhelmed by API traffic. Intelligent caching reduces load on the legacy system while keeping data fresh.

Monitoring & Logging

API usage dashboards, error tracking, and performance monitoring. Know who\'s calling what, how often, and whether it\'s working.

How We Work

Engagement Process

API Requirements

Define which data and operations need to be exposed. Prioritize by business value -- what integrations are blocked today?

Legacy System Analysis

Analyze how to extract data from the legacy system -- direct database, stored procedures, file interfaces, or screen automation.

API Design & Build

Design API contracts, build the middleware layer, and implement data mapping between legacy formats and modern JSON/REST.

Testing & Security

Load testing to ensure legacy system stability, security testing, and integration testing with consuming applications.

Documentation & Onboarding

Publish API documentation, developer guides, and sample code. Onboard internal teams and third-party integrators.

Common Questions

Frequently Asked Questions

Work with Metrotechs

Every engagement starts with an assessment.

Not a proposal. Not a sales call. We tell you what we find, not what you want to hear. The Launchpad assessment maps your operation before any software work begins.

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