Check a Proxy for IP, DNS and WebRTC Leaks with ToDetect
Check a browser proxy for IP, DNS, WebRTC and time zone leaks with ToDetect's free tools, using measured results from a 4G mobile line as the worked example.
Blog topic23 posts
Proxy analysis and comparisons
Analysis of proxy types, performance and common connection failures. All posts.
Python 3.15 for Web Scraping: What Installs, What Breaks
pip install scrapy fails on Python 3.15 without a C compiler: brotli has no cp315 wheel. We tested 19 scraping packages with pip and uv to see what else breaks.
Japanese price parsing: yen, width and tax labels
Parse Japanese price fields without losing currency or tax basis. Run a tested Python fixture for fullwidth yen, mixed prices and deliberate review cases.
How Many GB of Proxies Do You Need? Pages per GB, Measured
We loaded 34 public pages three ways through a metering proxy. 1 GB fits about 44,000 HTML-only fetches, or about 900 full Playwright page loads.
SOCKS5 vs SOCKS5h: What 6 Clients Actually Send (Tested)
socks5:// does not mean local DNS in every client. We logged what curl, Requests, HTTPX, aiohttp, Playwright and Node send a SOCKS5 proxy for each scheme.
CONNECT tunnel failed, response 403: Why AI Agents Hit It
Your agent's curl fails with CONNECT tunnel failed, response 403 while other hosts work. The proxy refused the tunnel. How to tell who blocked it, and the fix.
Betting odds API vs scraping: a cost worksheet
Compare odds APIs and authorized scraping by coverage, freshness and modeled collection cost. Use an editable worksheet with clear workload assumptions.
Unlimited residential proxies: what they cost per GB
Turn Mbps- and thread-based unlimited residential proxy plans into cost per GB, find the break-even with your per-GB rate, and check terms before you pay.
NO_PROXY wildcard, leading dot and CIDR: a tested matrix
Which NO_PROXY entries mean the same thing in curl, Python, Node, Go and wget? A loopback test of *, leading dots, CIDR, IPv6 and ports, with raw data.
Multiple Meta Ad Accounts: An Agency Setup Checklist
Manage multiple Meta ad accounts with a client access record, clear team responsibilities and a checklist for access errors, security incidents and routing.
AI agent proxies and compute: choose by responsibility
Map an AI agent's retrieval, runtime and model requirements before choosing services, with a release-note monitoring example and editable worksheet.
MostLogin proxy setup guide: add, test and share proxies
Add a proxy to MostLogin profiles step by step: protocol, host and port, credentials, the IP check, team access, batch import and the mistakes that break it.
Amazon prices: your offer vs the Featured Offer
Compare your Amazon offer with the Featured Offer using matched context, known shipping and a tested offline model that preserves missing data.
Amazon listing updates: accepted is not live
Diagnose accepted Amazon listing updates by separating submitted attributes, live offers, inventory and buyability, with a practical reconciliation matrix.
Bookmaker odds feeds: validate before comparing
Compare bookmaker odds only after checking market identity, settlement rules, timestamps and status. Use a local validator to expose false comparisons.
Cloudflare AI Agent Blocks: What to Fix First
Diagnose Cloudflare failures in AI-agent jobs, configure a stable browser proxy, and reject challenges or invalid content before RAG ingestion.
Proxy retries: one lost response, two created jobs
A local proxy drops a response after a POST creates a job. See when retrying duplicates work, when an idempotency key helps, and when to reconcile.
ETag monitoring: a no-cache header changed our results
A live proxy test found that one request header changed 304 responses into full downloads. Inspect the measured bytes, request policies and reproducible data.
Price monitoring: a matching number hid a currency mismatch
A live storefront check found USD and EUR prices labelled GBP in product JSON-LD. Inspect the recordings and validate currency before accepting a price signal.
Proxy errors explained: 407, 429, 502 and 504
Identify which layer returned a proxy error, check authentication and rate limits, and decide when a bounded retry of a failed request is safe.
Residential vs datacenter proxies: how to choose
Compare residential and datacenter proxies by network, content success, latency, session needs and billing, with five checks to guide your own tests.
Amazon and Google: why HTTP 200 can still mean failure
Why an HTTP 200 from Amazon or Google can still be a failed scrape: challenge pages, empty shells, robots rules and the official data options to check first.
What to measure in a proxy benchmark
Compare proxies using content success, response times and session behaviour, with a curl-based Python harness that records failures and calculates results.