mantis-browser
Advanced tools
Lets AI agents browse the web as short, numbered text instead of screenshots.
perzian.dev/mantis · by Perzian
It works with Claude Code, Codex, Cursor or your own agent as an MCP server. Install in two commands.
Early numbers, and they come from Mantis's own test pages: 25 local tasks graded by code, one model (deepseek-v4.1-flash), 3 runs each.
| Mantis | Accessibility tree | Screenshots | |
|---|---|---|---|
| Correct | 74/75 | 75/75 | 71/75 |
| Median tool calls | 4 | 6 | 10 |
| Median input tokens | 10.9k | 22.8k | 18.3k |
| Median time | 16.5s | 31.9s | 39.6s |
All three mostly succeed, so the difference is cost and speed: Mantis used about half the median input tokens of the tree and about a sixth of the screenshots' total cost. Real-site accuracy is not yet measured on a reviewed set. Method and caveats: bench/RESULTS.md.
MIT
FAQs
A lean browser interface for AI agents: web pages as short numbered text.
The npm package mantis-browser receives a total of 955 weekly downloads. As such, mantis-browser popularity was classified as not popular.
We found that mantis-browser demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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