Release / 21 Feb 2026 / with v9.3.0, v9.3.1, v9.3.2, v9.4.0, v9.4.1, v9.4.2, v9.4.4, v9.4.6

MCP for Unity v9.4.7

Edit prefab contents without opening the prefab stage.

All of MCP for Unity

Before you upgrade to v9.4.7

4 to fix

Replace `open_stage`, `close_stage` and `save_open_stage` calls with `manage_prefabs` action `modify_contents` for headless edits.

Action requiredCreate and modify Unity prefab assets.Affects: Automation calling the previous prefab-stage actions.

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Use loopback addresses for HTTP Local and HTTPS for HTTP Remote, or explicitly enable `Allow LAN Bind` / `Allow Insecure Remote HTTP` in Advanced Settings.

Action requiredConnect an MCP client and Unity Editor through an HTTP server.Affects: Local bind-all addresses and plaintext remote HTTP configurations.

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CoplayDev/unity-mcp/blob/v9.4.6/README.md

Remove unsupported `since_timestamp`; use supported filters and pagination. Console reads also stop crashing on Unity 6.5.

Action requiredRead or clear Unity console messages.Affects: Clients sending `since_timestamp` to `read_console`.

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CoplayDev/unity-mcp/releases/tag/v9.4.7

`manage_components` can wire UnityEvents and use serialized-property fallback. Remove stale search/component-only parameters from `manage_gameobject`; use the dedicated tools.

Action requiredCreate, load and save Unity scenes and modify GameObjects.Affects: Clients still sending old search/component parameters to manage_gameobject.Inferred

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What changed in v9.4.7

Headless prefab editing replaces the previous stage actions. Remote authentication, animation editing and stricter connection settings expand and change available workflows.

v9.4.7; Unity 2021.3 LTS+, Python 3.10+, uv and an MCP client.