{"type":"post","id":"mantis-an-open-source-mcp-browser-interface-claims-7592df","slug":"mantis-an-open-source-mcp-browser-interface-claims-7592df","title":"Mantis, an open-source MCP browser interface, claims 29-47% fewer input tokens than Playwright MCP for agents","description":"Mantis is an MIT-licensed MCP server that gives AI agents a compact, numbered text interface to web pages rather than screenshots or a full accessibility tree.","retrieval_nugget":"Mantis is an MIT-licensed MCP server that gives AI agents a compact, numbered text interface to web pages rather than screenshots or a full accessibility tree. Its authors report lower input-token use than Playwright MCP on selected public-web tasks; for builders, the immediate value is a concrete browser-tool alternative worth measuring in their own agent harness.","published_at":"2026-10-29","updated_at":"2026-10-29","record_date":"2026-10-29","date_kind":"published_at","topics":["mcp","claude","claude-code"],"entities":["Mantis","Perzian","Model Context Protocol","Playwright MCP","Claude Code","Codex","Cursor","Chromium"],"related_patterns":["harness-architecture-outlives-model-choice","agent-protocols-become-interoperability-layer","agent-economics-moves-to-completed-work"],"novelty_label":"new_fact","what_changed":"Mantis adds a distinct open-source MCP browser interface and claims 29–47% fewer input tokens than Playwright MCP.","prior_refs":["memory:5882ac12-fe28-8665-a6eb-c3aa906c6ae1","memory:bcbc7d8f-f882-8369-afb8-8e58c1e7a6b4","memory:ccda75dc-2d24-89b4-a4ec-9dfa8a9a1ed7"],"source_url":"https://github.com/perzianhq/mantis","source_urls":["https://github.com/perzianhq/mantis"],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"post:mantis-an-open-source-mcp-browser-interface-claims-7592df","status":"published","visuals":[],"editor":{"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]},"routes":{"html":"https://newruntime.com/posts/mantis-an-open-source-mcp-browser-interface-claims-7592df/","markdown":"https://newruntime.com/posts/mantis-an-open-source-mcp-browser-interface-claims-7592df.md","json":"https://newruntime.com/posts/mantis-an-open-source-mcp-browser-interface-claims-7592df.json"},"next_reads":[{"type":"topic","path":"/topics/mcp/","url":"https://newruntime.com/topics/mcp/","title":"Mcp","reason":"Explore the mcp topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/mcp.md","json_url":"https://newruntime.com/topics/mcp.json"},{"type":"topic","path":"/topics/claude/","url":"https://newruntime.com/topics/claude/","title":"Claude","reason":"Explore the claude topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/claude.md","json_url":"https://newruntime.com/topics/claude.json"},{"type":"topic","path":"/topics/claude-code/","url":"https://newruntime.com/topics/claude-code/","title":"Claude Code","reason":"Explore the claude-code topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/claude-code.md","json_url":"https://newruntime.com/topics/claude-code.json"},{"type":"collection","path":"/posts/","url":"https://newruntime.com/posts/","title":"Field Notes","reason":"Open the latest editorial analysis.","media_type":"text/html","json_url":"https://newruntime.com/posts.json"},{"type":"collection","path":"/source-ledger.json","url":"https://newruntime.com/source-ledger.json","title":"Source Ledger","reason":"Inspect the public source evidence graph.","media_type":"application/json"}]}