# jev-ultrafast-mcp (pypi · jev-ultrafast-mcp)

Hand browser work off to a server-side agent: read the page as a table, act, then verify.

- Trust score: 64/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-21

## Components

- pypi · `jev-ultrafast-mcp`: 64/100 (this document), [markdown](https://verifymcp.io/servers/jiawei686-jev-ultrafast-mcp/jev-ultrafast-mcp.md), [page](https://verifymcp.io/servers/jiawei686-jev-ultrafast-mcp/jev-ultrafast-mcp)

## Channel facts

- Registry: `pypi`
- Package: `jev-ultrafast-mcp`
- Version: `0.1.5`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-21.

- **Supply Chain Security**: 100/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - Runs hatchling.build at install time, a recognised native-build step with no shell scripting around it.
  - 1 of 33 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 32/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - License check failed: the license (MIT License) isn't a recognized OSI-approved license.
  - Actively maintained (last published 1 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 67/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 1750 tokens (~175/item across 10 items; 10 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **Tool Coverage**: 71/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 0% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - All 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation.
  - An AI judge read all 11 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (2026-07-28).

**Unverified: 1 category.** A category scored 0 because we could not verify it: a data source with nothing on this package, evidence we could not reach, or a check we could not run. We only credit what we can confirm.

## Install

### How do I install the jev-ultrafast-mcp server?

jev-ultrafast-mcp runs locally as a PyPI package, launched with uvx jev-ultrafast-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add jiawei686-jev-ultrafast-mcp -- uvx jev-ultrafast-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "jiawei686-jev-ultrafast-mcp": {
      "command": "uvx",
      "args": [
        "jev-ultrafast-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "jiawei686-jev-ultrafast-mcp": {
      "command": "uvx",
      "args": [
        "jev-ultrafast-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add jiawei686-jev-ultrafast-mcp -- uvx jev-ultrafast-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "jiawei686-jev-ultrafast-mcp": {
      "type": "local",
      "command": [
        "uvx",
        "jev-ultrafast-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add jiawei686-jev-ultrafast-mcp --command uvx --arg jev-ultrafast-mcp
```

### Hermes

```yaml
mcp_servers:
  jiawei686-jev-ultrafast-mcp:
    command: "uvx"
    args: ["jev-ultrafast-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "jiawei686-jev-ultrafast-mcp": {
      "Transport": "stdio",
      "Command": "uvx",
      "Arguments": [
        "jev-ultrafast-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add jiawei686-jev-ultrafast-mcp -t stdio -c uvx -a jev-ultrafast-mcp
```

### Other

```json
{
  "mcpServers": {
    "jiawei686-jev-ultrafast-mcp": {
      "command": "uvx",
      "args": [
        "jev-ultrafast-mcp"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-19 (score 64)

First indexed and scored.

## MCP tools (10)

### `browser_open` (~76 tokens)

Open a URL in a new owned tab and return the element table.

Use `hint` to restate the goal in one line; it is echoed back so the next
step has the goal in context without re-reading this call.

Input parameters:

- `hint` (string)
- `session` (string)
- `url` (string, required)

Output parameters:

- `result` (string)

### `browser_observe` (~114 tokens)

Re-read the page: new element table, or a delta if little changed.

\`mode`: "auto" (delta when possible), "full" (whole table, e.g. after a big
change), "delta" (force). `include_json=True` appends a machine-readable
copy of the element table when you want to plan over it programmatically.

Input parameters:

- `include_json` (boolean)
- `include_text` (boolean)
- `mode` (string)
- `session` (string)

Output parameters:

- `result` (string)

### `browser_act` (~330 tokens)

Execute one or more ops in order, then return a delta observation.

Batch ops into a single call — each call is a round trip.

op              fields
click           ref                     (ref may be "e12", or "e12" of a combobox to open it)
type            ref, text, [clear=true], [submit=false]
select          ref, value (option value or label)
toggle          ref, [state]            (checkbox/radio/switch; no state = flip)
hover           ref
upload          ref, path | paths[]
keys            key ("Enter", "Meta+A", "ArrowDown") | keys[]
scroll          [dir=down|up|left|right], [amount=600], [ref]
nav             url
back | forward | reload
wait            [ms=500]
wait_for_ref    ref, [timeout_ms=8000]
wait_for_text   text, [timeout_ms=8000]
wait_for_load   [timeout_ms=20000]
screenshot      [path], [full=false], [format=jpeg]
tab             action=list|new|switch|close, [index], [url]
eval            js                      (only when JEVMCP_ALLOW_JS=1)

Actions matching the confirmation rules (pay, delete account, …) return
needs_confirmation; re-send that op with "confirm": true to proceed.

Input parameters:

- `dry_run` (boolean)
- `observe_after` (boolean)
- `ops` (array, required)
- `session` (string)
- `stop_on_error` (boolean)

Output parameters:

- `result` (string)

### `browser_assert` (~245 tokens)

Verify the current page against deterministic checks. Returns pass/fail.

checks
  {"type": "url_matches",     "pattern": "*/checkout*"}
  {"type": "url_contains",    "text": "/orders/"}
  {"type": "title_matches",   "pattern": "*Order*"}
  {"type": "text_contains",   "text": "Thanks", "regex": false}
  {"type": "text_absent",     "text": "Error"}
  {"type": "element_exists",  "role": "button", "name": "Continue"}
  {"type": "element_gone",    "ref": "e12"}
  {"type": "value_equals",    "ref": "e7", "value": "Zurich"}
  {"type": "checked",         "ref": "e9", "state": true}
  {"type": "count_at_least",  "role": "link", "min": 3}
  {"type": "js",              "expr": "document.title.length > 3"}

Input parameters:

- `checks` (array, required)
- `session` (string)

Output parameters:

- `result` (string)

### `browser_macro` (~169 tokens)

Record, replay, list, or delete a macro — a discovered path with no model calls.

action="record_start"  begin capturing ops (needs the session to be driving the task)
action="record_stop"   finish and save under `name`
action="run"           replay `name`; `params` fills {{placeholders}} in text/url
action="list" | "inspect" | "delete"

Replay re-resolves each step by role + name against a fresh observation and
refuses to act when the best match is weak or ambiguous.

Input parameters:

- `action` (string, required)
- `goal` (string)
- `name` (string)
- `params`
- `session` (string)
- `start_url` (string)
- `threshold` (number)

Output parameters:

- `result` (string)

### `browser_goal` (~191 tokens)

Run a whole goal inside the server (turbo mode). Needs a decision-model key.

Each step costs one request (operation + every target head in a single
speculative fan-out). Use this when you want the browser driven end
to end without spending a host turn per click. Without a key, use
browser_observe + browser_act instead.

The key is TYPESAFE_API_KEY, or OPENROUTER_API_KEY when TYPESAFE_BASE_URL
points at https://openrouter.ai/api/alpha/decisions -- same model, same
contract, no TypeSafe account needed.

\`verify` runs browser_assert-style checks on the final page, so the result
is a fact rather than a model's claim of success.

Input parameters:

- `goal` (string, required)
- `max_steps` (integer)
- `session` (string)
- `verbose` (boolean)
- `verify`

Output parameters:

- `result` (string)

### `browser_tabs` (~145 tokens)

List, open, switch to, or close tabs.

Tabs opened by the page show up in observations on their own. To act on one,
prefer `target_id` (the `#handle` printed by action="list"): indexes are
positional and get renumbered whenever the tab list changes, so an index
read a call ago can address a different tab. `index` is a convenience when
listing and acting in the same breath; omit both to mean "the current tab".

Input parameters:

- `action` (string)
- `index` (integer)
- `session` (string)
- `target_id` (string)
- `url` (string)

Output parameters:

- `result` (string)

### `browser_sessions` (~17 tokens)

List open sessions (independent owned tabs).

Output parameters:

- `result` (string)

### `browser_close` (~72 tokens)

Close a session's tab. Set shutdown_browser=True to stop the browser too.

Only a browser this server launched is stopped. In attach mode the browser is
yours: shutdown detaches and leaves it, and every other window, running.

Input parameters:

- `session` (string)
- `shutdown_browser` (boolean)

Output parameters:

- `result` (string)

### `browser_doctor` (~47 tokens)

Report environment: browser binary, connection, keys, and policy envelope.

Call this when anything behaves unexpectedly — it separates "no browser"
from "blocked by policy" from "no key".

Output parameters:

- `result` (string)

## Diagnostics

Captured diagnostic sections: Provenance, Install scripts, Dependencies. The full working is on the page: https://verifymcp.io/servers/jiawei686-jev-ultrafast-mcp/jev-ultrafast-mcp#diagnostics

## Score history

- 2026-09-21: 64
- 2026-09-20: 64
- 2026-09-19: 64

## Common questions

### What is the jev-ultrafast-mcp server?

jev-ultrafast-mcp is listed in the public MCP registry as io.github.jiawei686/jev-ultrafast-mcp. Hand browser work off to a server-side agent: read the page as a table, act, then verify. This page covers its PyPI package (jev-ultrafast-mcp).

### Is the jev-ultrafast-mcp server safe to use?

jev-ultrafast-mcp scores 64 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 21 September 2026. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the jev-ultrafast-mcp server expose?

jev-ultrafast-mcp exposes 10 tools: browser_open, browser_observe, browser_act, browser_assert, browser_macro, and 5 more. Their descriptions and schemas cost roughly 1,406 tokens of context every time the server is loaded.

### Is the jev-ultrafast-mcp server still maintained?

jev-ultrafast-mcp is still listed as active in the MCP registry. We last reached this channel on 21 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- PyPI project: https://pypi.org/project/jev-ultrafast-mcp/
- Socket report: https://socket.dev/pypi/package/jev-ultrafast-mcp
- Repository: https://github.com/jiawei686/jev-ultrafast-mcp
- Changelog RSS feed: https://verifymcp.io/servers/jiawei686-jev-ultrafast-mcp/jev-ultrafast-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/jiawei686-jev-ultrafast-mcp/jev-ultrafast-mcp.json
- HTML version of this page: https://verifymcp.io/servers/jiawei686-jev-ultrafast-mcp/jev-ultrafast-mcp