DLBrowser MCP server

DLBrowser

Your AI agent is blind to the half of the web that fights back.

Cloudflare, captchas, and JavaScript walls block the tools agents use to browse — silently. DLBrowser is the one that gets through. One line. Self-healing. Metered to the credit.

npx dlbrowser connect --key dlb_xxx

Wires DLBrowser into Claude Code, Cursor, Windsurf, Cline & Codex in one command. Your agent gets 11 web tools that actually reach the page.

The 60-second try

pip install dlbrowser
dlbrowser fetch https://example.com

Every fetch tells you which backend got through and how long it took — because the engine picks the cheapest one that works and only escalates when a site fights back:

{ "success": true, "backend": "curl_cffi", "load_time": 0.03, "blocked": false }

And every run is metered against a plan, in the open — no surprise invoice:

{ "plan": "scout", "remaining_daily": 497, "remaining_monthly": 2497,
  "upgrade_url": "https://dekryptlabs.github.io/dlbrowser/pricing.html" }

That's a real response from the live gateway. Start free — 2,500 credits, no card.

Why your agent needs this

You wire web access into an agent. It works in the demo. Then it meets the real web:

• One site loads with a 50ms HTTP request. The next is an empty React shell until JS runs.
• Cloudflare and DataDome quietly serve your headless browser a challenge page.
• Your agent's built-in fetch returns "" — not an error, an empty string — and keeps going.
• You have no idea which sites failed, which backend would've worked, or what any of it cost.

DLBrowser is the capability layer that fixes this. Not a scraper. Not a crawler. Acquisition infrastructure for AI agents — reliable, observable, billable.

The engine: start cheap, escalate only when blocked

curl_cffi  →  tls_client  →  playwright  →  nodriver (CDP)  →  firecrawl
  ~50ms         ~200ms        full JS        max stealth       last resort
  HTTP-level, no browser       │            browser-level, real Chromium
                               └── auto-escalates when a block is detected

~70% of real fetches never need a browser. Starting with a 50ms request and climbing the ladder only on a detected block keeps you fast and cheap — while still getting through the sites that stop everything else. Five backends. Firecrawl has two. Crawl4AI has one.

What resets your expectations

Shortened. The full README is on GitHub.