CAPTCHA & Block Rates

Even with residential IPs, target websites sometimes show a CAPTCHA or block a request. This page explains why that happens and how to reduce it.

How detection works

Anti-bot systems look at much more than your IP address. They typically weigh:

IP reputation. Whether the IP is residential, and whether it has a history of abuse or proxy use.
Request rate. How many requests come from one IP, and how quickly.
Request fingerprint. Headers, TLS fingerprint, and HTTP version — whether your client looks like a real browser.
Behavior. Whether navigation, timing, and interaction look human.

Residential proxies solve the first point. The rest depends on how your client behaves.

What proxies can and can’t fix

FlameProxies gives you IPs that look like real users. It doesn’t change what your client sends. If your scraper sends requests with a default library user agent, no cookies, and no JavaScript support, a well-protected site can still flag it — whatever the IP. For HTTPS targets, the proxy only sees an encrypted tunnel. It can’t see the target’s responses, so detecting a CAPTCHA or block page is your application’s job.

How to improve success rates

Use the right proxy type

Premium residential proxies come from a curated pool of clean IPs with no proxy-detection history. If you see elevated CAPTCHA rates on standard residential, switching the same workload to package-premium is usually the fastest fix.

Rotate IPs appropriately

For independent page loads, rotate on every request so no single IP makes too many.
For logins and multi-step flows, use a sticky session. An IP that changes mid-session is a strong bot signal.

Pace your requests

FlameProxies has no limits on requests per second or concurrency, but target websites do. Spread requests out, and add small random delays rather than firing requests at a fixed interval.

Look like a real browser

Send realistic, consistent headers, including User-Agent, Accept, and Accept-Language.
Match Accept-Language and time zone to the country you’re exiting from.
For JavaScript-heavy sites, use a real browser through Playwright, Puppeteer, or Selenium.

Target broader locations

Narrow city targeting shrinks the pool, so the same IPs get reused more often. Target a country unless you really need a city.

Handle blocks in your application

Detect blocks and retry on a fresh IP. With sticky sessions, a new session ID gets a new IP:

import uuid
import requests

def fetch(url, max_attempts=3):
    for _ in range(max_attempts):
        session_id = uuid.uuid4().hex[:8]
        proxy_url = (
            f"http://USERNAME-package-standard-country-us-session-{session_id}-time-10"
            ":PASSWORD@proxy.flameproxies.com:8989"
        )
        resp = requests.get(url, proxies={"http": proxy_url, "https": proxy_url}, timeout=30)
        blocked = resp.status_code in (403, 429) or "captcha" in resp.text.lower()
        if not blocked:
            return resp
    raise RuntimeError(f"Still blocked after {max_attempts} attempts: {url}")

When to contact support

Contact support if you see consistently high block rates on a target after trying premium residential proxies, realistic headers, and slower pacing. Include the target domain, the proxy type and parameters you used, and roughly how many requests are blocked.

Getting Started

Proxies

Dashboard

API Reference

Code Examples

Troubleshooting

How detection works

What proxies can and can’t fix

How to improve success rates

Use the right proxy type

Rotate IPs appropriately

Pace your requests

Look like a real browser

Target broader locations

Handle blocks in your application

When to contact support

Next steps

Premium residential proxies

Connection debugging

​How detection works

​What proxies can and can’t fix

​How to improve success rates

​Use the right proxy type

​Rotate IPs appropriately

​Pace your requests

​Look like a real browser

​Target broader locations

​Handle blocks in your application

​When to contact support

​Next steps

Premium residential proxies

Connection debugging

How detection works

What proxies can and can’t fix

How to improve success rates

Use the right proxy type

Rotate IPs appropriately

Pace your requests

Look like a real browser

Target broader locations

Handle blocks in your application

When to contact support

Next steps