---
title: "Per-field LWW update for an env_sync graph node. Identity-immutable field mismatches open a conflict bucket (no partial writes)."
method: POST
path: "/api/mcp/tools/graph_update_entity"
tags: ["misc"]
---

# Per-field LWW update for an env_sync graph node. Identity-immutable field mismatches open a conflict bucket (no partial writes).

`POST /api/mcp/tools/graph_update_entity`

## Request

- Base URL: `https://api.ainote.dev`
- URL: `https://api.ainote.dev/api/mcp/tools/graph_update_entity`
- Auth: API key in header `Authorization`

Per-field LWW update for an env_sync graph node. Identity-immutable field mismatches open a conflict bucket (no partial writes).

## Request body

- object
  - `node_id` string, uuid, required
  - `device_id` string, uuid, required
  - `client_hlc` string
  - `field_updates` object[], required
    - `field` string, required
    - `value` unknown, required
    - `client_hlc` string, required

## Response `200`

Tool executed successfully

- ToolSuccessResponse: Successful tool invocation. `content` mirrors the MCP `tools/call` result shape: an array of content blocks (text and optionally a structured resource payload).
  - `content` object[]
    - `type` 'text' | 'resource'
    - `text` string

## Other responses

- `400`: Invalid arguments or business-rule violation
- `401`: Missing or invalid McpKey

---

[API](https://skmtc.dev/ainote/apis/ainote-mcp-openapi-mirror.md) · [All operations](https://skmtc.dev/ainote/apis/ainote-mcp-openapi-mirror/llms.txt) · [OpenAPI document](https://skmtc.dev/ainote/apis/ainote-mcp-openapi-mirror/revisions/f6c91d85e027?raw)