Integrate Your Siloed Business Applications with a Custom API

Most companies first try point-and-click automation tools. Their pre-built connectors seem easy, but the costs are hidden in task-based pricing. A single new order might trigger 5-7 tasks: check for an existing customer, create one if new, add line items, and log the result. At 100 orders per day, that is 15,000 tasks per month and a surprise $400 bill for one workflow.

Then they try native integrations, like a platform's official Salesforce-to-NetSuite connector. These sync standard objects like Accounts but fail on custom fields or business logic. For example, the native connector cannot handle a rule to only sync an invoice after it receives three approvals in a separate system. You are stuck with the vendor’s rigid data mapping, which never matches your actual business process.

This forces teams into brittle workarounds. A 30-person distributor used a screen-scraping tool to pull data from their legacy CRM. It broke every time the vendor updated the CRM's user interface, which happened twice last quarter. Each time, order processing stopped for over 24 hours while they manually re-keyed data and tried to fix the broken automation.

Syntora's approach to integrating siloed applications begins with a detailed discovery phase to map the entire data flow. For example, in a CRM-to-ERP integration, we would meticulously document how a field like `customer_id` in your CRM maps to `entity_id` in the ERP. This critical business logic is then stored in a configuration file, allowing for easy updates without altering core application code. If multi-step transactions require data staging, a Supabase database would be used to manage temporary data states.

The core of the integration would be a central API, engineered using Python and FastAPI. This API would expose simple, logical endpoints, such as `/create_invoice_from_deal`, designed to encapsulate all the necessary steps for communicating with the siloed systems. To manage external API calls efficiently, the `httpx` library would be used for asynchronous requests, preventing slow responses from one service from blocking other processes. All actions within the integration would be logged as structured JSON using `structlog` for clear debugging and operational monitoring.

This FastAPI application would be packaged into a container and deployed on AWS Lambda. This serverless function would be triggered by webhooks or scheduled events from your other applications. This architecture is designed for efficiency and cost-effectiveness, scaling automatically to handle varying transaction volumes while minimizing operational overhead.

For systems with modern REST APIs, Syntora would connect directly. For legacy applications that lack a contemporary API, the strategy often involves connecting directly to their underlying PostgreSQL or MySQL database, or developing custom data extractors. Syntora has extensive experience building document processing pipelines using Claude API for sensitive financial documents, and the same robust pattern applies when integrating diverse document types or data sources in a new vertical. This technical capability allows us to bridge gaps between disparate systems even when traditional APIs are absent.