Can I Use MCP Server

by kaiv Your server? Claim it

answering

Can I Use is answering right now. Last checked 4 min ago. It exposes 3 tools.

Browser support for web features, live from caniuse. From which version, and is it safe to ship?

Uptime history 14 days of history

14 days agonow

100.0%

Uptime 24h

92 of 92 checks

Tools

read from the server

170 ms

Response time

average over 24h

open, no key

Access

streamable-http

Nothing serious here today

Today is the operative word: we check Can I Use every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 4 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add can-i-use --transport http https://api.kaiv.ai/api/bridge/mcp/can-i-use-5446c68b

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "can-i-use": {
      "url": "https://api.kaiv.ai/api/bridge/mcp/can-i-use-5446c68b"
    }
  }
}

~/.codex/config.toml

[mcp_servers.can-i-use]
url = "https://api.kaiv.ai/api/bridge/mcp/can-i-use-5446c68b"

.cursor/mcp.json

{
  "mcpServers": {
    "can-i-use": {
      "url": "https://api.kaiv.ai/api/bridge/mcp/can-i-use-5446c68b"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "can-i-use": {
      "url": "https://api.kaiv.ai/api/bridge/mcp/can-i-use-5446c68b"
    }
  }
}

Available tools 3

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

feature

check_feature_support

Can I use this feature, and from which browser version? Accepts a loose name (":has()", "container queries", "css-grid") and resolves it to a caniuse feature, then returns the earliest continuously-supported version per major browser, global usage percentage, and a conservative safe_to_use flag. Use this first; it answers the whole question in one call.

get_feature_by_id

Support table for an exact caniuse feature id. Use when the id is already known, for example from a previous search. No fuzzy matching is applied.

features

search_features

Find the caniuse feature id for a loose query. Use when a query is ambiguous and you want to choose between candidates before checking support.

Endpoints

URL	Transport	State	Latency	Checked
https://api.kaiv.ai/api/bridge/mcp/can-i-use-5446c68b	streamable-http	answering	196 ms	4 min ago

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Can I Use — questions

Answers built from our own checks of this server.

What can Can I Use do?

It exposes 3 tools, read directly from the server on our last check. Among them: check_feature_support, get_feature_by_id, search_features. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Can I Use working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 170 ms. The bar chart above shows every period we have measured.

How do I connect Can I Use?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Can I Use need an API key?

No. Can I Use completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 3 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Can I Use?

It answers our handshake in 170 ms on average, which is faster than 72% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.