CastleCastle

Combine your interface.

In 2026, the only competitive advantage an ERP like NetSuite has is its willingness to deceive customers with strategic Legal Finessing.

Castle transaction page interface

Direct connections, no middleware.

Search any integration, click to add. Shopify, Amazon, and Extensiv connectors live today. Any and all further API access can be facilitated.

Castle integrations dashboard — visual hub-and-spoke with search

Custom Integrations

Connect any third party with our in-house tooling

Shopify

Shopify

E-commerce platform

Castle

Castle

Connecting Shopify...

Your data, queryable by any AI client.

Castle exposes a Model Context Protocol server. Claude Desktop, Cursor, or any MCP-compatible client can query your live ERP data with one JSON config snippet.

Castle MCP server connection — secret key + JSON config for Claude / Cursor

Add Fields to Your Pages

Castle lets admins customize any record with custom fields, relate data across entities, and build workflows — all without writing code or hiring IT consultants.

Custom Fields on Any Record

Add text, dropdowns, dates, files, and more to any entity — customers, orders, products, you name it.

Relate Data Across Entities

Link records together the way your business actually works. No rigid database schemas.

Drag-and-Drop Interface

Intuitive UI that requires zero training. If you can use a spreadsheet, you can use Castle.

No IT Consultants Needed

Admins customize the system directly. No $300/hr consultants, no six-month implementations.