Smithery is now a part of Arcade.dev! Read more in our announcement here
Caniuse (caniuse.com) for agents: Search caniuse; Search caniuse.com — through Unbrowse's scoped MCP for caniuse.com (unofficial), which replays caniuse.com's own first-party API (no browser,...
Caniuse as tools for your agent. Unofficial: not affiliated with or endorsed by caniuse.com. Unbrowse compiled these from caniuse.com's own requests: each call replays the site's first-party API server-side and returns a verified result. No scraping of rendered pages, no browser on your side, no caniuse.com API key.
This server is a tool scope holding only caniuse.com: its compiled tools plus the Unbrowse tools that run them, so the agent's tool list stays small and every call stays on caniuse.com.
claude mcp add --transport http caniuse https://unbrowse.ai/mcp/caniuse.com
codex mcp add caniuse --url https://unbrowse.ai/mcp/caniuse.com && codex mcp login caniuse
{"mcpServers":{"caniuse":{"url":"https://unbrowse.ai/mcp/caniuse.com"}}}
The first connect signs in to Unbrowse with OAuth (free tier, only verified results count). For scripts, send Authorization: Bearer $UNBROWSE_API_KEY (key from https://unbrowse.ai/app/keys; keep it in a secret manager, never in config you commit).
If none of the tools below are in this session's tool list, the server is not connected or not signed in: say so and stop. Do not fetch caniuse.com some other way and present it as this skill's result.
caniuse_com__get_process_query — Search caniuseSearch caniuse. Inputs: query. Returns featureIds. Read-only on caniuse.com.
query (string, required) — query (typed during “fill Search”)select (array) — Keep only these parts of the result: dots walk keys, [] maps over a list, a final {a,b} keeps several keys (e.g. "results[].{title,url}"). Unmatched paths come back in selectMissing.{"query":"<query>"}
caniuse_com__get_search — Search caniuse.comSearch caniuse.com with its own search (published OpenSearch description) and read the results page as title, text and links. One first-party HTTP request, no browser. Inputs: query. Returns the page's title, readable text and links. Read-only on caniuse.com.
query (string, required) — query — what to search for on caniuse.comselect (array) — Keep only these parts of the result: dots walk keys, [] maps over a list, a final {a,b} keeps several keys (e.g. "results[].{title,url}"). Unmatched paths come back in selectMissing.{"query":"features"}
Always there too: unbrowse.run (a task on caniuse.com in plain words), unbrowse.inspect, unbrowse.resume, unbrowse.scrape and unbrowse.map (any page on caniuse.com), and the recorded cloud browser unbrowse.browse.open → unbrowse.browse.act → unbrowse.browse.finish. Hosts that reject dotted names show them with _ (unbrowse_run).
status. succeeded carries the verified result. input_required is not a failure: answer the open fields with unbrowse.resume {runId, answers} on the same run.unbrowse.run {task}. It fails with no_capability when nothing is compiled for that yet: do it once with unbrowse.browse.open on caniuse.com → unbrowse.browse.act → unbrowse.browse.finish, which compiles a new tool this server lists next time. Anything off caniuse.com is refused here (not_in_scope): use the general Unbrowse server for that.unbrowse.browse.act with action: "autofill" fills caniuse.com's login from their Unbrowse password manager.succeeded result says. outcome_unknown means a change may have happened: check before retrying. Posting, buying, sending or deleting needs the user's go-ahead.Every tool is also a REST call:
curl -s https://unbrowse.ai/api/v1/sites/caniuse.com/call/caniuse_com__get_process_query \
-H "authorization: Bearer $UNBROWSE_API_KEY" -H "content-type: application/json" \
-d '{"query":"<query>"}'
OpenAPI: https://unbrowse.ai/api/v1/sites/caniuse.com/openapi.json. Every other site: the general Unbrowse skill (https://github.com/unbrowse-ai/unbrowse) and https://unbrowse.ai/mcp.
