WebdriverIO MCP (official)
Capped at 70: no passing tool call yet; the tests add up to 100. Why scores are capped
Test points add up to 100; the score is capped at 70 until a tool call passes. Not a quality or security rating. Methodology
Test points before the cap (100/100)
- Install20/20
- Handshake30/30
- Maintenance25/25
- Docs15/15
- License10/10
Tested version: @wdio/mcp 3.14.0 (server reports 3.13.0). npm latest is 4.1.0 (published 2026-10-30), which requires Node >=22.23.4; our test box runs Node 20.19.2, so npm installed 3.14.0, the newest release compatible with it. 4.1.0 not tested.
Transport (tested 2026-10-30): stdio
Score 70/100 · Tools 37 · Token cost ~8,287 · Compare · Last tested 2026-10-30 · Version tested 3.14.0 · Package @wdio/mcp · Repo webdriverio/mcp
Summary: WebdriverIO MCP (official) completed an MCP handshake without credentials and exposed 37 tools.
Evidence summary
- Handshake
- pass
- Tools listed
- 37
- Context cost
- 8,287 model-visible tokens (name, description, inputSchema; tiktoken cl100k_base)
Extra payload (sent by the server, usually not read by the model): 965 tokens; raw tools/list total 9,252. Clients differ in what they forward. ranking · add up your servers' context cost - API key
- No key to connect (handshake passed)
- Tested
- 2026-10-30
Test results
| Test | Result | Points | Evidence |
|---|---|---|---|
| install | pass | 20 | npm install @wdio/mcp (Node 20, Linux) succeeded in 12s. |
| handshake | pass | 30 | MCP initialize + tools/list over stdio succeeded with no credentials; 37 tools listed in 7.1s. |
| maintenance | pass | 25 | Repo pushed 0 days before test; 44 GitHub stars. |
| docs | pass | 15 | README over 3,000 chars; install instructions present; mcpServers config example present. Automated check of the package's own README (README shipped in npm package). |
| license | pass | 10 | MIT (OSI-approved). |
Local-model readiness
Schema context cost: ~8,287 tokens for 37 tools (37,785 bytes) · about 101% of an 8k context. Method: tiktoken cl100k_base over compact JSON of name+description+inputSchema (approximate).
Small-model friendly (schema heuristic, not a model result): unknown.
Small-model task runs: Not yet tested.
What we tested and what we didn't
Tested on 2026-10-30
- Install from the registry
- We connected with no credentials and asked for its tool list: it listed 37 tools (Method details: MCP
initializethentools/list) - Maintenance signals (last push, archived/deprecated status)
- Docs (README length, install and config example)
- License (OSI-approved or not)
- Tool-schema token cost (estimate)
Not tested
- Security: not audited (no code review, no permission or data-flow analysis)
- Real tasks (no functional task runs yet)
- Behaviour with real credentials or a real account
- Performance, rate limits or load
- Correctness of results beyond the listed tasks
Methodology: how we test. A high score means it installs and responds, not that it is safe to give it access to your data.
Known security issues
Not yet checked.
Monthly roundup: MCP security issues, October 2026.
Tool list changes
Baseline recorded from the 2026-10-30 test run; changes appear after the next test.
Snapshot hash (fingerprint of the tool list)
5e4f04e3c633: SHA-256 of the canonical tool names, descriptions and input schemas. If it changes, the tool list changed.
Raw test record (JSON)
{
"name": "@wdio/mcp",
"version": "3.14.0",
"registry": "npm",
"status": "working",
"tested": "2026-10-30",
"tools_count": 37,
"tools_schema_tokens_est": 8287,
"deprecated": false,
"archived": false,
"tests": {
"install": [
"pass",
20,
"`npm install @wdio/mcp` (Node 20, Linux) succeeded in 12s."
],
"handshake": [
"pass",
30,
"MCP `initialize` + `tools/list` over stdio succeeded with no credentials; 37 tools listed in 7.1s."
],
"maintenance": [
"pass",
25,
"Repo pushed 0 days before test; 44 GitHub stars."
],
"docs": [
"pass",
15,
"README over 3,000 chars; install instructions present; `mcpServers` config example present. Automated check of the package's own README (README shipped in npm package)."
],
"license": [
"pass",
10,
"MIT (OSI-approved)."
]
}
}Install
npx -y @wdio/mcp
Tools listed
start_session, attach_session, close_session, launch_chrome, emulate_device, navigate, switch_tab, switch_frame, scroll, click_element, set_value, set_cookie, delete_cookies, tap_element, swipe, drag_and_drop, switch_context, rotate_device, hide_keyboard, set_geolocation, execute_script, execute_electron_script, mock, get_mock_calls, manage_mock, trigger_electron_deeplink, get_elements, open_web_extension, list_apps, upload_app, query_docs, get_screenshot, get_accessibility_tree, get_tabs, get_contexts, get_app_state, get_cookies
Quick config
{
"mcpServers": {
"webdriverio-mcp-official": {
"command": "npx",
"args": [
"-y",
"@wdio/mcp"
]
}
}
}Add to config Opens the config generator with this server selected.
Setup
- Install. Run
npm install @wdio/mcp(Node 20). This is the exact command we ran on 2026-10-30. - Configure. Add the mcpServers entry below to your MCP client config.
- Verify. Restart the client and check that tools/list returns tools (37 in our test).
{
"mcpServers": {
"webdriverio-mcp-official": {
"command": "npx",
"args": [
"-y",
"@wdio/mcp"
]
}
}
}Test history
No dated events yet.
FAQ
Is WebdriverIO MCP (official) deprecated?
No. @wdio/mcp was not deprecated or archived when we last tested it on 2026-10-30.
What replaces WebdriverIO MCP (official)?
Nothing; WebdriverIO MCP (official) is not deprecated as of 2026-10-30.
Does WebdriverIO MCP (official) need an API key?
No. It completed an MCP handshake with no credentials and listed 37 tools.
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