clify: the web, rebuilt for agents

clify turns most websites into a JSON CLI and an MCP server: so far 156 public sites ship with verified commands (open data and government, developer registries, science, maps and weather, culture, news, sports, jobs). An agent explores the site once in a headless browser, records the requests behind what it clicks, writes a typed command for each, and tests every command live before keeping it. After that, agents call the site's own endpoints instead of clicking through pages: same answers, a fraction of the time, tokens and RAM. When a site needs an account, clify signs in with its own identity (email and phone) or with yours. When it hits a CAPTCHA, it stops and asks a human.

_{Replay of one live run (2026-10-18T09-57-57-642Z), sped up: the GIF starts at 0:17 on the race clock, once the browser has loaded its first page, and plays the 4× video at 4× again (16×). The same model (Claude Opus 5.5) does the same six jobs on five signed-in SaaS dashboards and a forum, once through a browser and once through clify with specs generated by clify add (5 of 6 CLIs generated; svix's robots.txt forbids exploring, so its spec is hand-written). This run: 4.0× faster, 7.3× cheaper. Over all 6 runs: 3.3× faster by mean time (288 s vs 87 s), paired per-run mean 3.5×; 7.3× cheaper by mean cost, paired 7.4×. Details below and in race/.}

In numbers: 156 sites ship with 1,802 live-verified read commands in the CLI and hosted MCP, including a new U.S./San Francisco set for events, startup hiring, transit, listings, local news, public data and prediction markets.

Built for YC's Make Something Agents Want hackathon (Oct 17–18, 2026).

Use it with curl, nothing to install

The public agent API is at https://clify-dev.netlify.app. It needs no install, key, or account:

curl "https://clify-dev.netlify.app/search?q=SF+tech+events"
curl "https://clify-dev.netlify.app/luma/discover-events?city=San%20Francisco"
curl "https://clify-dev.netlify.app/bart/get-departures?station=16TH"

Use /sites.json for the catalogue, /llms.txt for the full agent guide, and /<site>.json for commands and verified example URLs. Task-specific entry points start with San Francisco and U.S. agent tasks, Luma events, YC startup jobs, BART departures, Craigslist SF listings, and DataSF. Finnish sites remain in the catalogue; their task pages are still available. Machine-readable discovery manifests are at /agent.json and /.well-known/webmcp.json.

Live demo: 6 browser agents vs 6 clify agents

Twelve Claude Code agents (Claude Opus 5.5) start at the same moment: on each of the six sites above, one works in a browser and one with clify, same prompt, same accounts. Every account was created by the agent itself with its own email. Each tile turns green when an independent check finds the object on the live site. Recorded live run of Oct 18, 08:58 PT: clify all 6 verified at 0:27.6 for $0.64; browser agents all 6 verified at 1:43.8 for $2.06. Run it yourself: race/bin/grid (on the machine with the sessions) or race/bin/mac-demo (from a laptop, over ssh); details in race/.

Try it in 10 seconds (hosted MCP, nothing to install)

claude mcp add --transport http clify https://bold-cl

... [View full README on GitHub](https://github.com/toukoursin/clify#readme)