Browser (agent-infra)
Last tested 2026-10-22
Score 100/100 · Last tested 2026-10-22 · Version tested 1.2.29 · Package @agent-infra/mcp-server-browser · Repo bytedance/UI-TARS-desktop
Summary: Browser (agent-infra) completed an MCP handshake without credentials and exposed 21 tools.
Test results
| Test | Result | Points | Evidence |
|---|---|---|---|
| install | pass | 20 | npm install @agent-infra/mcp-server-browser (Node 20, Linux) succeeded in 4s. |
| handshake | pass | 30 | MCP initialize + tools/list over stdio succeeded with no credentials; 21 tools listed in 5.4s. |
| maintenance | pass | 25 | Repo pushed 13 days before test; 39,363 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: ~1,552 tokens for 21 tools (6,788 bytes) · about 19% 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): medium.
Small-model task runs: Not yet tested.
Functional tasks (1/2 passed, tested 2026-10-22)
| Task | Tool | Result | Evidence |
|---|---|---|---|
| navigate to https://example.com/ | browser_navigate | pass | [{"type":"text","text":"Navigated to https://example.com/No clickable elements found"}] |
| read page title (expect "Example Domain") | browser_get_text | fail | [{"type":"text","text":"This domain is for use in documentation examples without needing permission. This is not a service; avoid relying on it for testing and |
Not tested
We did not test behavior with real credentials, security, or performance under load. These are planned; see methodology.
Tools listed
browser_navigate, browser_go_back, browser_go_forward, browser_form_input_fill, browser_get_markdown, browser_get_text, browser_read_links, browser_new_tab, browser_tab_list, browser_switch_tab, browser_close_tab, browser_evaluate, browser_get_download_list, browser_screenshot, browser_click, browser_select, browser_hover, browser_get_clickable_elements, browser_scroll, browser_close, browser_press_key
Config used in our test
{
"mcpServers": {
"browser-agent-infra": {
"command": "npx",
"args": [
"-y",
"@agent-infra/mcp-server-browser"
]
}
}
}FAQ
Is Browser (agent-infra) deprecated?
No. @agent-infra/mcp-server-browser was not deprecated or archived when we last tested it on 2026-10-22.
What replaces Browser (agent-infra)?
Nothing; Browser (agent-infra) is not deprecated as of 2026-10-22.
Does Browser (agent-infra) need an API key?
No. It completed an MCP handshake with no credentials and listed 21 tools.
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