Silhouette is an authentication library for Play Framework applications that supports several authentication methods, including OAuth1, OAuth2, OpenID, CAS, Credentials, Basic Authentication, Two Factor Authentication or custom authentication schemes.
Choosing a proxy for AI agents and browser automation is a different problem than choosing one for manual browsing or simple scraping. Agents run at volume, retry on failure, hold sessions across multi-step tasks, and often hit pages that actively detect automation. The requirements that fall out of that are specific: low block rates on JavaScript-heavy targets, stable session management for stateful workflows, cost that doesn't compound on retries, and protocol support that fits into headless browser stacks.
Here is what actually matters and how to evaluate it.
Residential vs. datacenter proxies
For AI agents hitting commercial targets — e-commerce, social platforms, search engines, financial data sites — residential proxies are close to mandatory. Datacenter IPs are fast and cheap, but large-scale anti-bot systems have fingerprinted most datacenter ranges. A Playwright or Puppeteer agent running through a datacenter proxy will hit CAPTCHAs or soft blocks at rates that make the cost savings irrelevant once you factor in retries and failed runs. Residential IPs route traffic through real consumer devices on ISP networks, which means they pass the basic IP-reputation checks that datacenter ranges fail.
The tradeoff is cost. Residential bandwidth is priced per GB because the underlying supply is perishable — devices go offline, sessions expire. Datacenter bandwidth is effectively unlimited at a fixed rate. For agents that pull small payloads per request, residential per-GB pricing is manageable. For agents that stream large responses or download files, it needs to be budgeted explicitly.
Session control for stateful agents
This is where most residential proxy providers fall short for agent use cases. An agent that logs in, navigates a multi-step form, and then submits data needs the same IP across all those requests — or the target site will see a session from three different countries in thirty seconds and kill it.
Good residential proxy infrastructure supports sticky sessions: a session ID embedded in the proxy credential that pins requests to the same IP for a defined window. The useful range is anywhere from five minutes for quick stateful tasks to thirty minutes for longer workflows. Per-request rotation is the right default for stateless scraping, but for browser automation you need to be