harmonyos-dev-mcp 0.7.6

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HarmonyOS Dev MCP

harmonyos_dev_mcp is the current mainline HarmonyOS MCP service for device automation, app deployment, UI interaction, E2E support, and log-based validation.

What It Provides

This service exposes HarmonyOS automation capabilities as MCP tools so they can be called from:

• MCP clients
• AI agents
• test platforms
• custom automation scripts

Typical use cases:

• build and install a HarmonyOS app
• launch an app and verify the target window
• find, click, input, swipe, and capture screenshots
• wait for UI state changes
• inspect the UI tree
• query logs for errors or business markers

Requirements

• Python 3.12+
• DevEco Studio 5.0+
• hdc
• uv

Run

uv sync --all-packages
uv run harmonyos-dev-mcp

Tool Groups

• General: list_devices, query_package, logs_query
• Build: build_app, install_app, run_app, uninstall_app
• UI: screenshot, click_element, long_press_element, input_text, swipe, drag, press_key, find_element
• E2E: get_ui_tree, list_windows, wait_element

Parameter Docs

The detailed parameter reference is maintained here:

• Tool Reference

That document covers:

• parameter names and types
• defaults
• required and optional inputs
• mutual exclusion and dependency rules
• key result fields
• common error codes
• minimal call examples

Important Call Notes

• build_app is long-running. Set MCP tools/call timeout to at least 60s, and prefer 120s for cold builds.
• build_app defaults to build_mode="debug", target="hap", and product="default".
• build_app target="hnp" builds a normal HAP first, injects built HNP packages from the module hnp directory, and re-signs the output with SDK tools. It does not call project-local .bat, .ps1, or .sh scripts.
• HNP signing reads build-profile.json5. If DevEco stores encrypted passwords there, set HAP_SIGN_PASSWORD, or set HAP_KEY_PASSWORD and HAP_STORE_PASSWORD, so hap-sign-tool.jar can sign with plaintext credentials.
• If a project already defines hvigor signing in build-profile.json5, build_app returns the hvigor artifact directly.
• If hvigor only produces an unsigned HAP and the project uses a project-local MDM signing flow, build_app tries project_root/hapsigner/2-<build_mode>-sign.bat.
• query_package.info_type supports only list, abilities, main_ability, and permissions.
• input_text.element_handle must be an object returned by find_element or wait_element, not a JSON string.
• logs_query supports mode="errors" and mode="markers".
• logs_query defaults to realtime sampling and does not fall back to historical logs unless fallback_to_historical=true.

Examples

Query installed packages:

result = await client.call_tool("query_package", {
    "device_id": "3QC0124C11000711",
    "info_type": "list"
})

Click an element using a handle from find_element:

element = await client.call_tool("find_element", {
    "device_id": "3QC0124C11000711",
    "text": "Login"
})

await client.call_tool("click_element", {
    "device_id": "3QC0124C11000711",
    "element_handle": element["structuredContent"]["result"]["elements"][0]["element_handle"]
})

Fetch the UI tree:

ui_tree = await client.call_tool("get_ui_tree", {
    "device_id": "3QC0124C11000711"
})

Result Shape

All tools return a unified MCP envelope:

{
  "content": [{"type": "text", "text": "tool_name: ok"}],
  "structuredContent": {
    "tool": "tool_name",
    "ok": true,
    "result": {},
    "error": null,
    "meta": {
      "request_id": "uuid",
      "timestamp": "2026-03-19T00:00:00+00:00",
      "duration_ms": 123
    }
  },
  "isError": false
}

Development

Run tests:

uv run pytest services/harmonyos_dev_mcp/tests/unit -v

Release 0.7.6

• Added build_app target="hnp" for direct HNP HAP packaging and signing.
• Uses the SDK app_packing_tool.jar and hap-sign-tool.jar instead of project-local build scripts.
• Detects HNP packages under module hnp directories such as entry/hnp/arm64-v8a/*.hnp.
• Returns artifact_source="hnp_direct" and a signed *-signed-hnp.hap output.
• Added edge-case coverage for missing HNP packages, missing SDK packaging jars, missing hvigor packaging inputs, and ordinary target="hap" builds that should not trigger HNP repackaging.

Docs

• Tool Reference
• Logs Query Guide