Open-Source Tool Mantis Released: Speeds Up AI Agent Web Browsing by 36% via Text-Based Pages

Perzian has open-sourced Mantis, a web browsing MCP server that converts webpages into concise, numbered text for AI agents to process, serving as an alternative to screenshots and accessibility trees. Benchmarks show that on long-horizon tasks, its end-to-end latency is reduced by roughly one-third compared to Playwright MCP, with input tokens cut by 29% to 47% and tool calls reduced by 29% to 37%.