business-central-mcp

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An MCP server that speaks BC's native WebSocket protocol, giving AI assistants direct access to pages, data, actions, reports, and multi-company switching.

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MCP server for Microsoft Dynamics 365 Business Central. Speaks BC’s undocumented WebSocket protocol directly, the same one the browser-based web client uses. No OData, no SOAP, no browser automation.

11 tools covering page navigation, data reads/writes, action execution, dialog handling, report execution, and multi-company switching. Protocol reverse-engineered from 26 decompiled BC28 server assemblies.

Session resilience with exponential backoff, invoke timeouts, license auto-dismiss, and modal state recovery. 128 unit tests, 103 integration tests against live BC27/BC28.

Install via npx business-central-mcp. BC27 and BC28 supported (wire-compatible). NavUserPassword authentication.