ModelsAtlas
Explore
Atlas / MCP servers / jiawei686 / jev-ultrafast-mcp

jev-ultrafast-mcpCAUTION

mcp/jiawei686/jev-ultrafast-mcp
MCP server by jiawei686 · agent tools · ai agents · browser agent · Audited 2026-10-11
⚑ Report / re-scanSource ↗

Hand a whole browser task off in one call: a decision model drives the page server-side, so a flow costs one call, not a turn per click. Ref-based element tables, code-checked assertions, zero-model macro replay, over the Chrome DevTools Protocol.

Verdict
CAUTION
Grade
B
Trust score
87 /100
Exposed tools
—
Transport
stdio
License
MIT
Stars
19
01

Overview

From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.

[](https://github.com/jiawei686/jev-ultrafast-mcp/actions/workflows/ci.yml) [](https://github.com/jiawei686/jev-ultrafast-mcp/blob/main/LICENSE) [](https://github.com/jiawei686/jev-ultrafast-mcp/blob/main/pyproject.toml)

English · 简体中文

Hand the browser work off — an MCP server that drives the page for your agent.

Your agent should not be opening the browser at all. A browser task goes over whole — the URL, the goal, and the check that proves it — and the loop runs on the server. One tool call instead of twenty. Three seconds instead of a minute. A cent instead of a frontier model's context. And it never invents a target: it picks from what the page actually has, and the server refuses rather than guesses.

What it cost. A cent for the whole day, and a cent is all of it:

Quick start

Three commands, then restart your client.

git clone https://github.com/jiawei686/jev-ultrafast-mcp.git
cd jev-ultrafast-mcp
python3 -m venv .venv
.venv/bin/pip install -e .          # Windows: .venv\Scripts\pip install -e .

python scripts/install.py           # finds your MCP clients and writes their config

install.py looks for WorkBuddy, Claude Code, Claude Desktop, Codex CLI, Cursor, VS Code, Cline, Windsurf and Gemini CLI, and writes the format each one expects — merging into your existing config and saving a .bak first. Ne

Read from source at commit 77db2fd4f723OBSERVED · 2026-10-11
02

Connect

Built from this server's own package name, version and transport as found in its source — not copied from anyone's documentation, so it cannot drift against a page we do not control.

claude-code (pypi)
claude mcp add jev-ultrafast-mcp -- uvx jev-ultrafast-mcp==0.1.5
03

Trust audit

CAUTIONgrade B · trust 87/100 Install with care. The audit found things worth knowing before you trust its output.

LayerWhat it checksResult
L0Provenance & inventoryPASS
L1Static analysis of the codeWARN
L2Instruction surface (what it tells the agent)PASS
L3Class-specific surfacePASS
L4Behavioural (sandbox)SKIPPED

What the source does

Filesystem
declared (4 observation(s))
Network
declared (6 observation(s))
Shell
none-observed
Dependencies
pinned
Secrets in source
found

Findings (11)

MEDIUMNetwork egress · net.raw_ip · CWE-200, CWE-319
.env.example:54
# JEVMCP_CDP_URL=http://127.0.0.1:9222
MEDIUMHard-coded secrets · secret.generic · CWE-798, CWE-321
tests/test_macro_recording.py:34
PASSWORD = "correct-horse-battery-staple"
LOWNetwork egress · net.beacon_words · CWE-200, CWE-319
tests/test_page_idle.py:175
_sent(session.cdp, "beacon.js")
LOWNetwork egress · net.raw_ip · CWE-200, CWE-319
README.md:406
[obs#1] http://127.0.0.1:54409/fixture.html  "Ultrafast Fixture"  scroll=0/860  reachable=16/16
LOWNetwork egress · net.raw_ip · CWE-200, CWE-319
README.md:429
[delta#2] http://127.0.0.1:54409/fixture.html  "Ultrafast Fixture"  reachable=16/16
LOWNetwork egress · net.raw_ip · CWE-200, CWE-319
README.md:653
| No | `JEVMCP_CDP_URL` | — | `http://127.0.0.1:9222` when `mode=attach`, or a `ws://` URL to skip discovery |
LOWNetwork egress · net.raw_ip · CWE-200, CWE-319
README.md:738
Yes. `JEVMCP_MODE=attach` plus `JEVMCP_CDP_URL=http://127.0.0.1:9222` drives your own Chrome. In
LOWObfuscation / stealth · obf.decode_call · CWE-506, CWE-94
jev_ultrafast_mcp/browser.py:1134
path.write_bytes(base64.b64decode(result["data"]))
LOWObfuscation / stealth · obf.decode_call · CWE-506, CWE-94
scripts/extension_check.py:330
path.write_bytes(base64.b64decode(data["data"]))
LOWObfuscation / stealth · obf.decode_call · CWE-506, CWE-94
tests/test_extension.py:124
codecs.decode(escape, "unicode_escape")
LOWInventory / provenance · mcp.no_tools_extracted · CWE-1104
server.json
Why it matters. the tool list is enumerated at runtime by tools/list, not declared in source
Fix. the page says so rather than showing an empty table

Gates applied: no_behavioural_pass.

Audited 2026-10-11 · audit v0.4.1 · source sha 77db2fd4f723full audit observations/trust-audit/mcp-server/jiawei686__jev-ultrafast-mcp.json · Report an issue / request a re-scan
04

Audit history

Every audit this server has had. A grade with a past is a grade somebody is still checking.

DateSourceVerdictGradeScoreChange
2026-10-1177db2fd4f723CAUTIONB87first audit
05

Questions

What is the jev-ultrafast-mcp MCP server?

Hand a whole browser task off in one call: a decision model drives the page server-side, so a flow costs one call, not a turn per click. Ref-based element tables, code-checked assertions, zero-model macro replay, over the Chrome DevTools Protocol.

Is jev-ultrafast-mcp safe to connect to an agent?

With care. The audit graded it B (87/100) and found 11 things worth knowing before you trust this server, listed below with the exact line each was found on.

What credentials does jev-ultrafast-mcp need?

No credential environment variables were found in its source, so it appears to need none.

How does jev-ultrafast-mcp run?

It speaks stdio, so it runs as a local process your client starts. It is published on PyPI as jev-ultrafast-mcp.

How current is this page?

The grade is for one exact copy of the source (77db2fd4f723), read on 2026-10-11. The repository is watched and re-audited when it changes.

Advertisement