---
title: "MCP: writable tables and DME extension writes"
description: "crossReference is now creatable and stockBalance is now updatable via the Business NXT MCP. update_entity accepts DME extension columns (flat field names or the extensions array …"
lang: en
languages:
  en: https://docs.vismasoftware.no/businessnxtapi/release-notes/2026-05-27-mcp-writable-tables-and-dme-extension-writes/index.md
lastmod: 2026-05-27
---

> Documentation index: https://docs.vismasoftware.no/businessnxtapi/llms.txt


# MCP: writable tables and DME extension writes

Last modified May 27, 2026

2026-05-27


Label: api:mcp


`crossReference` is now creatable and `stockBalance` is now updatable via the [Business NXT MCP](https://docs.vismasoftware.no/businessnxtapi/ai/mcp/index.md). `update_entity` accepts DME extension columns (flat field names or the `extensions` array shape). `create_entity` and `update_entity` now default `onError` to `FAIL_TABLE` to prevent silent partial writes, and `create_entity` with `dryRun` returns the full server-computed shape including nested children and currency context. Relations from `get_table_definitions` now carry the `queryName`/`relation` hints needed to construct `joinup`/`joindown` queries.



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[View this page](https://docs.vismasoftware.no/businessnxtapi/release-notes/2026-05-27-mcp-writable-tables-and-dme-extension-writes/)