scrapy-stealth

Stealthy Crawling. Maximum Results.

A pluggable anti-bot and stealth framework for Scrapy.

scrapy-stealth extends Scrapy with browser impersonation, proxy rotation, fingerprint cycling, and intelligent retry strategies — designed for large-scale, production-grade crawling.

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🧠 Why scrapy-stealth?

Scrapy is fast and powerful, but modern websites use advanced anti-bot protections such as:

• TLS fingerprinting
• Browser behavior detection
• Rate limiting and IP blocking

scrapy-stealth helps by adding:

• 🧬 Browser-level impersonation (TLS + HTTP/2 fingerprints)
• 🔁 Smarter retry strategies
• 🌐 Proxy and fingerprint rotation
• 🛡️ Anti-bot detection

Result

• Higher success rate
• Lower proxy cost
• More stable crawls

📊 Comparison

⚠️ scrapy-playwright passes real browser TLS but does not spoof fingerprint profiles like scrapy-stealth does. scrapy-impersonate provides TLS/HTTP2 impersonation via curl_cffi but lacks built-in rotation, detection, or per-request engine switching. JavaScript rendering is available via the optional browser driver — use it selectively for pages that require a full browser.

✨ Features

• 🔌 Pluggable engine system (scrapy, stealth)
• 🧠 Per-request engine selection via request.meta
• 🌐 Proxy support and rotation
• 🧬 Browser fingerprint rotation
• 🔁 Smart retry logic
• 🛡️ Anti-bot detection (status + content-based, Cloudflare, Akamai)
• 🧠 Smart browser selection — start with fast basic / turbo, auto-retry once with visible Chrome when a JS challenge or ban is detected
• ⚡ Thread-safe async integration
• 🖥️ Real-browser engine (CDP) for JS-heavy pages
• 🔄 Intelligent session recycle — after consecutive bans, browser restarts Chrome; basic/turbo clear HTTP sessions
• 🚫 Static asset blocking — skip images, fonts, CSS, and media for faster, lighter browser fetches
• 🎯 Proxy bypass list — send chosen domains straight to the origin instead of through the proxy (--proxy-bypass-list)
• 🧭 Custom DNS overrides — pin hosts to fixed IPs (connect via IP, keep hostname for TLS/SNI/Host) to dodge poisoned or geo-shifted public DNS
• 📸 Built-in snapshot decorator (scrapy_stealth.decorators.snapshot)

📦 Installation

pip install scrapy-stealth

Requires Python 3.11+ and Scrapy 2.12–2.x

⚙️ Setup

Option 1 — Global (settings.py)

# 1. Enable the middleware
DOWNLOADER_MIDDLEWARES = {
    "scrapy_stealth.middlewares.StealthDownloaderMiddleware": 950,
}

# 2. (Optional) Route ALL requests through stealth automatically — no meta needed per request
STEALTH_ENABLED = True
STEALTH_DRIVER = "turbo"  # "basic" (default), "turbo", "browser", or "auto"
STEALTH_AUTO_FALLBACK = True  # retry basic/turbo JS challenges once with browser (headless=False)

# 3. (Optional) Proxy list — seeded as engine default; rotated on ban-streak session recycle
#    Supported schemes: http, https, socks4, socks5
STEALTH_PROXIES = [
    "http://proxy1:8080",
    "http://proxy2:8080",
    "http://user:pass@proxy3:8080",  # with authentication
    "socks5://proxy4:1080",
]

# 4. (Optional) Pin hosts to fixed origin IPs (bypass public DNS)
#    Connects to the IP while keeping the hostname for TLS SNI / Host / certs
STEALTH_DNS_OVERRIDES = {
    "example.com": "203.0.113.10",
    "www.example.com": "203.0.113.10",
}

Option 2 — Per-spider (custom_settings)

Configure the middleware and all stealth settings directly on the spider — no changes to settings.py required.

class MySpider(scrapy.Spider):
    name = "example"

    custom_settings = {
        "DOWNLOADER_MIDDLEWARES": {
            "scrapy_stealth.middlewares.StealthDownloaderMiddleware": 950,
        },
        "STEALTH_ENABLED": True,
        "STEALTH_DRIVER": "turbo",
        "STEALTH_AUTO_FALLBACK": True,
        "STEALTH_PROXIES": [
            "http://proxy1:8080",
            "http://user:pass@proxy2:8080",
            "socks5://proxy3:1080",
        ],
        "STEALTH_DNS_OVERRIDES": {
            "example.com": "203.0.113.10",
        },
    }

Proxies are validated at startup — invalid format or unsupported scheme raises ValueError immediately. DNS overrides are validated the same way — invalid IPs raise ValueError immediately.

🚀 Quick Start

Option A — Per-request (stealth only on specific requests):

yield scrapy.Request(
    url="https://example.com",
    meta={"stealth": {}},
)

Option B — Global mode (stealth on every request automatically):

# settings.py or custom_settings
STEALTH_ENABLED = True
STEALTH_DRIVER = "turbo"
STEALTH_AUTO_FALLBACK = True  # optional: basic/turbo -> browser on JS challenge

# No meta needed — all requests go through stealth
yield scrapy.Request(url="https://example.com")

# Opt out for a specific request
yield scrapy.Request(url="https://api.internal/health", meta={"stealth": False})

Option C — Smart browser selection (fast HTTP first, Chrome only when needed):

# settings.py or custom_settings — enable fallback for all stealth requests
STEALTH_ENABLED = True
STEALTH_DRIVER = "turbo"  # primary: fast HTTP driver
STEALTH_AUTO_FALLBACK = True  # retry once with browser (headless=False) on JS challenge / ban

# Or per-request — same behaviour without a global setting
yield scrapy.Request(
    url="https://example.com",
    meta={"stealth": {"driver": "auto"}},
)

See Smart browser selection for full details.

🔧 Global Configuration

Customise package-wide defaults via the shared config instance. All settings must be applied at module level, before the spider class — the engine client is created at middleware initialisation, so changes inside start_requests or parse will have no effect.

# myspider.py
import scrapy
from scrapy_stealth.config import config

config.DEFAULT_ENGINE = "stealth"  # "scrapy" (native) or "stealth" (browser impersonation)
config.DEFAULT_PROFILE = "chrome_147"  # browser profile when meta["stealth"]["profile"] is not set
config.DEFAULT_TIMEOUT = 30  # stealth request timeout in seconds
config.STEALTH_DRIVER = "turbo"  # "basic" (default), "turbo", "browser", or "auto"
config.STEALTH_AUTO_FALLBACK = True  # basic/turbo -> browser on JS challenge (headless=False)
config.HTTP2 = True  # False for servers that only support HTTP/1.1
config.BLOCK_CODES |= {407}  # extend blocked status codes (|= keeps defaults)
config.BLOCK_KEYWORDS.append("banned")  # extend blocked body-text patterns
config.BROWSER_HEADLESS = True  # browser driver: headless mode (False = visible window, more stealthy)
config.BROWSER_SETTLE_S = 4.0  # browser driver: seconds to wait after navigation for JS to finish
config.BROWSER_EXECUTABLE_PATH = "/usr/bin/brave-browser"  # custom browser binary (default: auto-detect Chrome)
config.STEALTH_RECYCLE_AFTER_BANS = 5  # recycle Chrome / HTTP sessions after 5 consecutive bans
config.BROWSER_STATIC_ASSETS_BLOCK = True  # block images/fonts/CSS/media (skipped when snapshot=True)
config.BROWSER_PROXY_BYPASS_LIST = ["example.com", "*.internal"]  # these bypass the proxy
config.STEALTH_DNS_OVERRIDES = {"example.com": "203.0.113.10"}  # pin host → origin IP


class MySpider(scrapy.Spider):
    name = "example"
    ...

# ❌ wrong — too late, the engine client is already created
class MySpider(scrapy.Spider):
    def start_requests(self):
        config.HTTP2 = False  # has no effect
        ...

You can also read any value programmatically:

config.get("DEFAULT_ENGINE")  # "scrapy"
config.get("MISSING_KEY", "default")  # "default"

For one-off overrides on a single request, set meta["stealth"]["driver"] or meta["stealth"]["http2"] (see Per-Request Configuration below).

⚙️ Per-Request Configuration

All options are passed via request.meta["stealth"].

The presence of meta["stealth"] (a dict) activates the stealth engine. Omit the key to use the default Scrapy engine. When STEALTH_ENABLED = True, all requests are stealth by default — pass meta={"stealth": False} to opt out for a specific request.

yield scrapy.Request(
    url,
    meta={
        "stealth": {
            "driver": "turbo",
            # optional overrides — otherwise profile/proxy come from defaults and
            # rotate automatically when the session recycles after consecutive bans
            "profile": "chrome_147",
            "proxy": "http://user:pass@proxy:8080",
            "stealth_timeout": 60,
            "http2": True,
            "dns": "203.0.113.10",  # or {"example.com": "203.0.113.10"}
        }
    },
)

🧭 Custom DNS Overrides

Pin a hostname to a fixed origin IP so the package dials that address directly instead of trusting public DNS. The request URL stays as https://example.com/... — TLS SNI, the Host header, and certificate verification still use the hostname.

Global (settings.py / custom_settings / config):

STEALTH_DNS_OVERRIDES = {
    "shop.example.com": "203.0.113.10",
    "cdn.example.com": "203.0.113.11",
}

Per-request (overrides or extends the global map):

yield scrapy.Request(
    "https://shop.example.com/item/1",
    meta={"stealth": {"driver": "turbo", "dns": "203.0.113.10"}},
)

# Or a full mapping:
meta = {"stealth": {"dns": {"shop.example.com": "203.0.113.10"}}}

Supported on basic and turbo per-request. The browser driver applies the effective map (config + meta["stealth"]["dns"]) via a local CONNECT relay that dials the pinned IP (Chrome's --host-resolver-rules is not used — it is unreliable). Chrome is pointed at the relay with --proxy-server; when the DNS map changes, the browser restarts so the relay is rebuilt. Do not put DNS-pinned hosts on BROWSER_PROXY_BYPASS_LIST or they will skip the relay. With an HTTP proxy on basic/turbo, DNS is often resolved by the proxy — prefer direct connections or SOCKS when using overrides.

🧠 Smart browser selection

Pick the right driver automatically: stay on fast HTTP impersonation (basic / turbo) for normal pages, and escalate to real Chrome only when the response looks like a JS challenge or session ban (403/429/503, Cloudflare “Just a moment”, Akamai, DataDome, and similar signals).

The fallback always opens a visible Chrome window (headless=False) for better evasion — regardless of BROWSER_HEADLESS or any prior meta["stealth"]["headless"] value.

Global (settings.py / custom_settings):

STEALTH_ENABLED = True
STEALTH_DRIVER = "turbo"  # or "basic" — primary HTTP driver
STEALTH_AUTO_FALLBACK = True  # off by default; set True to enable smart selection globally

Per-request (no global setting — equivalent to enabling fallback for that URL only):

yield scrapy.Request(
    url,
    meta={"stealth": {"driver": "auto"}},  # primary = STEALTH_DRIVER, else basic
)

Always use browser (skip phase 1):

meta={"stealth": {"driver": "browser"}}

Opt out for one request:

meta={"stealth": {"driver": "auto", "fallback": False}}
# or globally: STEALTH_AUTO_FALLBACK = False

Each request is retried at most once. If the browser fetch fails, the original basic / turbo response is returned. Console output and stats (stealth/fallbacks, stealth/requests/browser) show when escalation happened.

🖥️ Browser Engine

For sites protected by Cloudflare JS challenges or heavy JavaScript rendering, use the browser driver. It runs a real Chrome instance via the DevTools Protocol (no WebDriver), keeping one persistent browser and opening a new tab per request.

Per-request (most common):

yield scrapy.Request(
    url,
    meta={
        "stealth": {
            "driver": "browser",
            "headless": False,  # visible window — harder to detect (default: True)
            "settle": 4.0,  # seconds to wait for JS after page load
        }
    },
)

Heavy Cloudflare sites — increase settle time:

meta = {"stealth": {"driver": "browser", "headless": False, "settle": 12}}

Global default (all stealth requests use browser engine):

from scrapy_stealth.config import config

config.STEALTH_DRIVER = "browser"
config.BROWSER_HEADLESS = False  # more stealthy
config.BROWSER_SETTLE_S = 6.0  # longer wait for JS

Custom browser binary (Brave, Chromium, or a non-default Chrome install):

from scrapy_stealth.config import config

config.BROWSER_EXECUTABLE_PATH = "/usr/bin/brave-browser"  # Linux
# config.BROWSER_EXECUTABLE_PATH = r"C:\Program Files\BraveSoftware\Brave-Browser\Application\brave.exe"  # Windows

Or via settings.py / custom_settings:

BROWSER_EXECUTABLE_PATH = "/usr/bin/brave-browser"

When BROWSER_EXECUTABLE_PATH is None (the default), scrapy-stealth auto-detects Google Chrome or Chromium from standard system paths. Set it explicitly when using Brave or a non-standard Chrome installation — a clear error is raised if the path does not exist.

Intelligent restart / session recycle:

After STEALTH_RECYCLE_AFTER_BANS consecutive banned/challenged responses (as classified by Anti-Bot Detection), scrapy-stealth recycles the driver session:

• browser — restarts Chrome (fresh fingerprint, cookies, CDP session)
• basic / turbo — clears cached HTTP clients/sessions and rotates default fingerprint profile + proxy from STEALTH_PROXIES (no per-request rotate_* needed)

A single clean response resets the streak, so a healthy crawl is never recycled just because it has served a lot of requests.

from scrapy_stealth.config import config

config.STEALTH_RECYCLE_AFTER_BANS = 5  # recycle after 5 consecutive bans (default)

Static asset blocking:

scrapy-stealth can block static assets (images, fonts, CSS, and media) in the browser to speed up page loads and cut bandwidth, via the CDP Fetch domain. It's off by default — enable it globally with BROWSER_STATIC_ASSETS_BLOCK = True in settings.py, or per-request via meta["stealth"]["static_assets_block"]. Blocking is always skipped when snapshot=True, since a snapshot needs the fully rendered page.

# settings.py
BROWSER_STATIC_ASSETS_BLOCK = True

# per-request
meta = {"stealth": {"driver": "browser", "static_assets_block": True}}

# snapshot always wins — assets are never blocked here, even with the global default on
meta = {"stealth": {"driver": "browser", "snapshot": True}}

Proxy bypass list:

When a proxy is configured, you can send specific domains straight to the origin instead of through the proxy. The list is passed to Chrome's --proxy-bypass-list launch flag, so it supports the full Chrome bypass syntax — bare hostnames, wildcards (*.example.com), IP/CIDR ranges, ports, and the special <local> token.

# settings.py
STEALTH_DRIVER = "browser"
STEALTH_PROXIES = ["http://user:pass@proxy:8080"]
BROWSER_PROXY_BYPASS_LIST = [
    "example.com",  # exact host
    "*.internal.net",  # wildcard subdomains
    "127.0.0.1",  # IP
    "<local>",  # any plain hostname without dots
]

# or via config
from scrapy_stealth.config import config

config.BROWSER_PROXY_BYPASS_LIST = ["example.com", "*.internal.net"]

The bypass list is a Chrome launch flag, so it's read once when the browser starts and applies to the whole browser lifetime — it's configured globally (config/settings), not per-request. It has no effect unless a proxy is in use.

Docker (running as root):

Chrome requires --no-sandbox when the process runs as root. scrapy-stealth detects this automatically, but you can also set it explicitly in settings.py:

BROWSER_NO_SANDBOX = True  # force no-sandbox (Docker, any root environment)
BROWSER_EXECUTABLE_PATH = "/usr/bin/chromium"  # use Chromium instead of Chrome in Docker

Or via config:

config.BROWSER_NO_SANDBOX = True
config.BROWSER_EXECUTABLE_PATH = "/usr/bin/chromium"

Performance note: the browser engine is slower than basic/turbo (~5-15s per page vs <2s). Use it selectively — route only JS-protected URLs to "browser" and keep everything else on "turbo".

📸 Screenshots

Capture a PNG screenshot of any page rendered by the browser driver and save it to disk.

Enable on the request

yield scrapy.Request(
    url,
    meta={
        "stealth": {
            "driver": "browser",
            "snapshot": True,
        }
    },
    callback=self.parse,
)

The raw PNG bytes are available at response.meta["snapshot_content"] inside your callback.

Auto-save with snapshot decorator

from scrapy_stealth.decorators import snapshot


class MySpider(scrapy.Spider):

    @snapshot
    def parse(self, response): ...

    @snapshot(path="stealth_shots/page.png")
    def parse(self, response): ...

    @snapshot(path=lambda r: r.url.split("/")[-1] + ".png")
    def parse(self, response): ...

Note: Requires driver="browser" and snapshot=True in the request meta. Logs an error if no snapshot data is found in the response.

Custom handling (without the built-in helper)

The screenshot is just bytes in response.meta["snapshot_content"] — do anything you like with it:

def parse(self, response):
    shot: bytes | None = response.meta.get("snapshot_content")
    if shot is None:
        return  # screenshot was not requested or capture failed

    # Save manually
    with open("page.png", "wb") as f:
        f.write(shot)

    # Pass to a pipeline via item
    yield {"url": response.url, "screenshot": shot}

🔁 Automatic Rotation

Profile + proxy stay stable for speed (session reuse). After STEALTH_RECYCLE_AFTER_BANS consecutive bans, the session recycles and a new default profile + proxy (from STEALTH_PROXIES) are chosen automatically.

# settings.py
STEALTH_PROXIES = ["http://proxy1:8080", "http://proxy2:8080"]
STEALTH_RECYCLE_AFTER_BANS = 5  # default

# spider
yield scrapy.Request(url, meta={"stealth": {}})

Scrapy stats: after the crawl (or mid-run via crawler.stats), inspect:

# e.g. in spider_closed
stats = spider.crawler.stats.get_stats()
print(stats.get("stealth/bans"), stats.get("stealth/recycles"))

🧩 Strategies

Proxy Rotation

from scrapy_stealth.strategies.proxy import ProxyRotator

proxy_rotator = ProxyRotator([
    "http://proxy1:8080",
    "http://proxy2:8080",
])

yield scrapy.Request(
    url,
    meta={
        "stealth": {
            "proxy": proxy_rotator.get(),
        }
    },
)

Fingerprint Rotation

from scrapy_stealth.strategies.fingerprint import ProfileRotator

fp = ProfileRotator()

yield scrapy.Request(
    url,
    meta={
        "stealth": {
            "profile": fp.get(),
        }
    },
)

Intelligent Retry

from scrapy_stealth.strategies.retry import RetryHandler

retry = RetryHandler()


def parse(self, response):
    if retry.should_retry(response):
        yield retry.build(response.request)
        return

🛡️ Anti-Bot Detection

from scrapy_stealth.detectors.antibot import AntiBotDetector

detector = AntiBotDetector()

if detector.is_blocked(response):
    print("Blocked!")

📊 Full spider example

Keep the README short — the complete working spider lives in examples/full_spider.py.

It shows:

• middleware + STEALTH_ENABLED via custom_settings
• default turbo driver
• per-request basic / browser overrides
• optional snapshot with @snapshot
• ban detection and stealth stats on close

# from a Scrapy project
scrapy crawl stealth_demo

# or one-off
scrapy runspider examples/full_spider.py

Minimal version:

import scrapy


class ExampleSpider(scrapy.Spider):
    name = "example"
    custom_settings = {
        "DOWNLOADER_MIDDLEWARES": {
            "scrapy_stealth.middlewares.StealthDownloaderMiddleware": 950,
        },
        "STEALTH_ENABLED": True,
        "STEALTH_DRIVER": "turbo",
    }

    def start_requests(self):
        yield scrapy.Request("https://example.com")

    def parse(self, response):
        yield {"title": response.css("title::text").get(), "url": response.url}

⚡ Performance Insight

Using stealth selectively:

• ⚡ Faster crawling (Scrapy for simple pages)
• 💰 Lower proxy cost
• 🛡️ Better success rate on protected pages

📜 Changelog

See CHANGELOG.md for a full history of changes, or browse GitHub Releases.

🤝 Contributing

See CONTRIBUTING.md for guidelines on how to contribute.

📄 License

This project is licensed under the MIT License — free to use, modify, and distribute. See LICENSE for the full text.