StealthPlex 0.0.2

Multi-engine stealth fetch layer for Python scraping—anti-bot bypass from TLS fingerprinting to CDP browsers, with optional auto-escalation.

StealthPlex

Stealth web scraping when basic HTTP gets blocked — Cloudflare (Turnstile, interstitial), Akamai, Imperva, Datadome, and similar bot walls.

StealthPlex wraps the tools you'd reach for anyway — wreq, curl_cffi, cloudscraper, Scrapling, and SeleniumBase — behind a single Fetch() interface with built-in stealth: randomized browser fingerprints (User-Agent, Sec-CH-UA, Sec-Fetch-*, Accept-Language, Referer), automatic TLS/JA3 impersonation, and serial engine escalation from fast HTTP all the way to stealth browser UC/CDP automation (headed on Windows/macOS, auto-Xvfb on Linux).

from StealthPlex import Fetch

# Zero config — stealth headers + serial engine fallback
fetch = Fetch()
resp = fetch.get("https://protected-site.com")
print(resp.text)      # HTML
print(resp.json())    # or JSON
print(resp.engine)    # which engine bypassed

Fallback chain: curl_cffi → wreq → cloudscraper → scrapling → seleniumbase
Each request gets randomized stealth fingerprints. If one engine gets blocked, the next one takes over automatically.

Install

1. Installation

StealthPlex core has no default engine dependencies to remain lightweight. You must install at least one engine extra to perform requests.

Recommended: Install all engines

Using uv:

uv add StealthPlex --extra all

Using pip:

pip install "StealthPlex[all]"

Install individual engines

wreq (Rust TLS / HTTP2 Impersonation)

Using uv:

uv add StealthPlex --extra wreq

Using pip:

pip install "StealthPlex[wreq]"

curl_cffi (libcurl Impersonation)

Using uv:

uv add StealthPlex --extra curl_cffi

Using pip:

pip install "StealthPlex[curl_cffi]"

cloudscraper (Cloudflare Solver)

Using uv:

uv add StealthPlex --extra cloudscraper

Using pip:

pip install "StealthPlex[cloudscraper]"

scrapling (Playwright-based Stealth Browser)

Using uv:

uv add StealthPlex --extra scrapling

Using pip:

pip install "StealthPlex[scrapling]"

seleniumbase (UC/CDP Mode Browser)

Using uv:

uv add StealthPlex --extra seleniumbase

Using pip:

pip install "StealthPlex[seleniumbase]"

Install multiple specific engines

Using uv:

uv add StealthPlex --extra curl_cffi --extra seleniumbase

Using pip:

pip install "StealthPlex[curl_cffi,seleniumbase]"

2. Upgrading Engines (Bypass Updates)

Because anti-bot protections change constantly, you should keep all engine packages updated to their latest versions:

Using uv:

uv add --upgrade "StealthPlex[all]"

Using pip (requires --upgrade-strategy eager to force upgrade of all extra engines):

pip install --upgrade --upgrade-strategy eager "StealthPlex[all]"

Engines

Engine	Extra	Layer	Upstream	Detailed Docs
wreq	wreq	L1	0x676e67/wreq-python	wreq Guide
curl_cffi	curl_cffi	L1	lexiforest/curl_cffi	curl_cffi Guide
cloudscraper	cloudscraper	L2	VeNoMouS/cloudscraper	cloudscraper Guide
scrapling	scrapling	L3	D4Vinci/Scrapling	scrapling Guide
seleniumbase	seleniumbase	L4	seleniumbase/SeleniumBase	seleniumbase Guide

---

Quick Start — Stealth Fallback (Default)

Just call Fetch() — no engine needed. StealthPlex injects stealth headers and walks the engine chain serially until one bypasses.

Basic GET — Parse HTML or JSON

from StealthPlex import Fetch

fetch = Fetch()

# GET with full stealth headers auto-injected
resp = fetch.get("https://httpbin.org/get")
print(resp.status_code)
print(resp.text)                           # raw HTML/text
print(resp.json())                         # auto-parse JSON
print(resp.engine)                         # "wreq", "curl_cffi", etc.
print(resp.attempts)                       # ("wreq",) or ("wreq", "curl_cffi")
print(resp.ok)                             # True if status < 400

POST with JSON body

from StealthPlex import Fetch

fetch = Fetch()
resp = fetch.post(
    "https://httpbin.org/post",
    json={"username": "admin", "password": "secret"},
    headers={"X-Custom": "value"},
)
print(resp.json())

PUT, DELETE, PATCH, HEAD, OPTIONS

from StealthPlex import Fetch

fetch = Fetch()

# PUT with raw data
resp = fetch.put("https://httpbin.org/put", data="update payload")
print(resp.json())

# DELETE
resp = fetch.delete("https://httpbin.org/delete")
print(resp.status_code)

# PATCH with JSON
resp = fetch.patch("https://httpbin.org/patch", json={"key": "val"})
print(resp.json())

# HEAD (status + headers only)
resp = fetch.head("https://httpbin.org/get")
print(resp.status_code, resp.headers)

# OPTIONS
resp = fetch.options("https://httpbin.org/get")
print(resp.status_code)

Custom Headers, Cookies, Params, Redirects

from StealthPlex import Fetch

fetch = Fetch()

# All parameters work with full IDE autocomplete
resp = fetch.get(
    "https://httpbin.org/get",
    headers={"Authorization": "Bearer token123"},
    cookies={"session": "abc123"},
    params={"q": "stealth scraping", "page": "1"},
    timeout=30.0,
    allow_redirects=False,         # or redirect=False
)
print(resp.status_code)
print(resp.json())

Custom Fallback Order

from StealthPlex import Fetch

# Only try these two engines in this order
fetch = Fetch(fallback=["curl_cffi", "cloudscraper"])
resp = fetch.get("https://example.com")
print(resp.engine)

---

Engine-Specific Examples

For full upstream API access (types, autocomplete, docs), bind to a specific engine:

wreq (TLS Impersonation - Async)

import asyncio
from StealthPlex import Fetch

async def main():
    fetch = Fetch(engine="wreq")
    response = await fetch.get("https://example.com", emulation=fetch.Emulation.Firefox149)
    print(await response.text())

asyncio.run(main())

curl_cffi (TLS Impersonation - Sync/Async)

from StealthPlex import Fetch

fetch = Fetch(engine="curl_cffi")
response = fetch.get("https://example.com", impersonate="chrome124")
print(response.text)

cloudscraper (Cloudflare Session Bypass)

from StealthPlex import Fetch

fetch = Fetch(engine="cloudscraper")
scraper = fetch.create_scraper(browser="chrome")
response = scraper.get("https://example.com")
print(response.text)

scrapling (Stealth Browser Fetch & Selector)

from StealthPlex import Fetch

fetch = Fetch(engine="scrapling")
response = fetch.fetcher.fetch("https://example.com")
print(response.text)

seleniumbase (Hard-Target Browser UC/CDP Automation)

from StealthPlex import Fetch

fetch = Fetch(engine="seleniumbase")
with fetch.SB(uc=True) as sb:
    sb.activate_cdp_mode("https://example.com")
    sb.sleep(2.0)
    print(sb.get_page_source())

---

API Summary

Need	Use	Docs
Stealth auto-bypass (recommended)	Fetch()	—
Custom engine order	Fetch(fallback=["wreq", "curl_cffi"])	—
Full wreq API	Fetch(engine="wreq")	Guide
Full curl_cffi API	Fetch(engine="curl_cffi")	Guide
Full cloudscraper API	Fetch(engine="cloudscraper")	Guide
Adaptive fetch (Scrapling)	Fetch(engine="scrapling")	Guide
Full SeleniumBase API	Fetch(engine="seleniumbase")	Guide
Shortcuts	curl_fetch(), wreq_fetch(), cloudscraper_fetch(), scrapling_fetch(), seleniumbase_fetch()	—