# REST API Development and System Integration Source: - TR version: - RU version: - UZ version: > We build modern REST API services so your different software systems can communicate securely and consistently. With authentication, authorization, logging, and documentation standards, we establish a sustainable integration infrastructure that lowers maintenance costs. **System integration** lets your ERP, accounting, CRM, e-commerce, shipping and payment software exchange data securely and consistently. Moserra connects systems that have an API through REST services, and portals without one (for example SAP Board or e-Logo draft invoices) through Playwright-based bots. ## Who is it for? - Accounting and operations teams entering the same data into two or three systems by hand - Businesses downloading reports manually because their portal has no API - Companies that need a secure API for mobile apps, websites and partners ## What we build - **Versioned REST APIs:** authentication, authorisation, rate limiting, idempotent requests and structured logging - **ERP and accounting integration:** two-way data exchange with SAP, Logo / e-Logo and similar systems - **Bots for systems without an API:** Playwright automation with session handling, retries and error management - **Scheduled sync and monitoring:** live logs, a status dashboard and failure alerts ## An example from production e-Logo offered no API for draft invoices, so they were downloaded by hand. With a bot that manages sessions per branch and a synchronisation that retries every 7 minutes, **more than 12,847 invoices were transferred to the CRM with a 98.2% success rate**. ## Timeline A core integration between two systems is typically running on staging **within one week**; the monitoring dashboard and additional systems follow in later sprints. ## Frequently asked questions **Can you integrate a system that has no API?** Yes. Systems with a web interface are connected through Playwright bots that sign in like a real user. Session expiry, retries and error states are handled by the bot. **How do we know if an integration breaks?** Every sync run is logged and shown on the status dashboard. Failed operations are retried automatically, and repeated failures trigger an alert. **Which ERP systems have you worked with?** We have integrations running in production with SAP and Logo / e-Logo. For other systems we first analyse the API or interface and confirm a workable approach.