DonSeTch: Free Rust MCP Server with Stealth Fetching & Zero API Keys
Opening_Library9560 · reddit · 2026-08-23
The author released DonSeTch, a Rust-based MCP server for web research that requires zero setup, zero API keys, and minimizes token usage.
Technical Highlights
- Real Browser Fingerprinting: Embeds Chrome's BoringSSL and a full HTTP/2 stack, bypassing bot walls like Cloudflare without simple UA spoofing.
- Two-Tier Escalation: Prioritizes HTTP requests; spins up a headless browser only to solve challenges, then passes cookies back to the fast layer.
- Extreme Token Efficiency: The focus parameter performs section-aware extraction, reducing 50KB pages to 500 chars of relevant info.
Three Tools
- fetch: Converts URLs/PDFs to clean Markdown with dead-link resurrection.
- search: Fuses results from multiple keyless engines using an ONNX cross-encoder for reranking.
- crawl: Sitemap-aware crawler with adaptive pacing and resume tokens.
AGPL-3.0 licensed, compatible with Claude Code, Cursor, and other MCP clients.
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