C# web scraping usually pairs HttpClient with an HTML parser such as AngleSharp. Reuse one client, set firm limits, validate every response, and stop pagination loops before saving records. Use Playwright for JavaScript-rendered pages, and add proxies only when a documented routing or location requirement exists.
Use curl's -H or --header option to send a Hypertext Transfer Protocol (HTTP) request header. Repeat the option for multiple fields, and use --json for JavaScript Object Notation (JSON) bodies. Inspect traffic with -v, -i, -I, or -D, keep credentials out of saved commands, and review custom fields before redirects.
To use a residential proxy with the OpenAI Agents SDK, put the proxy configuration in the HTTP client or browser that your agent calls as a tool. The SDK's Agent object decides when to call the tool, while the tool sends its website request through a Proxidize Residential Proxy.
The best residential proxies in the UK in 2026 are Proxidize, Bright Data, Oxylabs, IPRoyal, and DataImpulse. Proxidize is a strong option for managed residential proxies with 195+ countries, city and ISP targeting, rotating and sticky sessions, and pricing starting at $1/GB. Bright Data and Oxylabs are better suited to large-scale and enterprise workflows, while IPRoyal and DataImpulse offer flexible options for scraping, automation, and data collection.
To use a Proxidize residential proxy with Browser Use, pass the dashboard-generated endpoint and credentials to ProxySettings, attach that configuration to Browser, and give the same Browser to the Agent:
Cloudflare Error 1020: Access Denied means a request matched a website owner's Cloudflare Firewall Rule with a Block action. Visitors cannot remove that rule. Save the blocked URL, screenshot, time, and Cloudflare Ray ID, then send them to the website's official support team. Site owners should search Security > Analytics > Events—or the Analytics page's Events tab in the new dashboard—for the Ray ID or client IP and correct the narrowest false-positive condition.
Run each Browser Use agent in its own Browser instance and give that browser an independent residential proxy session. Cap the number of simultaneous browsers with a semaphore, verify the proxy IP before the task, and check it again afterward when a Sticky identity must remain stable.
Cloudflare Error 1015 means a website's rate-limit rule temporarily blocked requests; it is not a Hypertext Transfer Protocol (HTTP) status. There is no universal duration, so visitors should stop refreshing, follow retry guidance, and wait before one controlled attempt. Site owners should use the Ray ID and Security Events to find and tune the matching rule.
Bright Data does not have one price. Its public 2026 catalog uses four different billing units: bandwidth, allocated IPs, successful requests, and successful records.
Error code 407 means an HTTP proxy requires the client to authenticate before it will handle the request. The destination website is not asking for these credentials. The proxy is.
Squid is the strongest general-purpose choice for a self-hosted HTTP and HTTPS forward proxy with caching, access controls, authentication, and detailed logging. 3proxy is a better fit when a small deployment needs HTTP, HTTPS CONNECT, SOCKS4, SOCKS5, DNS, port mapping, and proxy chaining in one compact package. Dante is the specialist choice for a dedicated SOCKS4 or SOCKS5 server.