# OpenTools

> OpenTools (opentools.com) builds tools for the agentic web. Its main product is AUR, the Agent Usability Rating: a free 0–100 score of how well AI shopping agents (ChatGPT, Claude, Perplexity, Meta's Muse, Grok, and the agents built on them) can reach a store, read its catalog, and complete a purchase. It also hosts a registry of Model Context Protocol (MCP) servers.

## AUR — Agent Usability Rating

- [Scan a site](https://opentools.com/): enter a domain for a free passive scan (about 20 seconds, no signup) that runs 28 automated checks against the live site
- [Leaderboard](https://opentools.com/aur/leaderboard): every scored store ranked by AUR, filterable by platform and level. The curated list of major retailers on it is rescanned daily
- [Methodology](https://opentools.com/aur/methodology): the full rubric. Checks fall into four pillars (Access 35 points, Catalog legibility 25, Transactability 25, Trust & policy 15). Three gates cap the score, and a convex curve maps the total to five levels: Blocked (0–29), Visible (30–59), Legible (60–79), Shoppable (80–94), and Agent-Native (95–100)
- [Agent Walk](https://opentools.com/aur/agent-walk): a paid review in which a real AI agent in a real browser walks a store from search to checkout and records every point of friction
- Score reports live at https://opentools.com/aur/{domain} (for example https://opentools.com/aur/allbirds.com), with the score, level, pillar breakdown, per-check evidence, and fixes
- The latest stored scan for a domain is available as JSON from `GET https://opentools.com/api/aur/scan?domain={domain}` (404 if the domain has not been scanned)

## Registry

- [MCP Server Registry](https://opentools.com/registry): official MCP servers with tool lists, install commands, and changelogs
- [AI & LLM tools](https://opentools.com/registry/ai-tools): category hub
- [Databases](https://opentools.com/registry/databases): category hub
- [Development](https://opentools.com/registry/development): category hub
- [Productivity](https://opentools.com/registry/productivity): category hub
- [Communication](https://opentools.com/registry/communication): category hub
- Individual servers live at https://opentools.com/registry/{id}

## Optional

- [Sitemap](https://opentools.com/sitemap.xml)
- [Terms of Service](https://opentools.com/legal/terms)