can-i-use MCP: what works in Claude, ChatGPT, Cursor, and Grok Bot
Browser support for web features, live from caniuse. From which version, and is it safe to ship?
Registry name: ai.kaiv/can-i-use (v1.0.0)
Status grid
| App | Status | Date tested |
|---|---|---|
| Claude | Untested | Not yet tested |
| ChatGPT | Untested | Not yet tested |
| Cursor | Untested | Not yet tested |
| Grok Bot | Untested | Not yet tested |
| MCP Inspector (reference client) | Untested | Not yet tested |
| MCP TypeScript SDK (reference client) | Works | Sat Oct 17 2026 |
Hands-on test results
| App | Task | Result | Time | Detail | Date tested |
|---|---|---|---|---|---|
| MCP TypeScript SDK (reference client) | connect (no auth) | Works | 368 ms | Connected without sign-in in 368 ms. | Oct 17, 2026, 2:10 AM CT |
| MCP TypeScript SDK (reference client) | list tools | Works | 232 ms | 3 tools: check_feature_support, get_feature_by_id, search_features. | Oct 17, 2026, 2:10 AM CT |
| MCP TypeScript SDK (reference client) | search_features ("model context protocol") | Works | 205 ms | search_features: 57 characters returned. "{"query":"model context protocol","count":0,"matches":[]}" | Oct 17, 2026, 2:10 AM CT |
| MCP TypeScript SDK (reference client) | search with nonsense query | Works | 189 ms | search_features: 55 characters returned. "{"query":"zqxjvflurbo938 qpwmz","count":0,"matches":[]}" | Oct 17, 2026, 2:10 AM CT |
| MCP TypeScript SDK (reference client) | error handling (missing required input) | Works | 143 ms | search_features: tool error, 153 characters returned. "{"error":"invalid_arguments","message":"search_features was called with invalid arguments: q is required. Call tools/list for this tool's in" | Oct 17, 2026, 2:10 AM CT |
Oct 17, 2026, 2:10 AM CT, MCP TypeScript SDK (reference client): Scripted client using the official MCP TypeScript SDK against https://api.kaiv.ai/api/bridge/mcp/can-i-use-5446c68b (Streamable HTTP, protocol 2025-11-25). No sign-in needed. Server Can I Use v1.0.0. Read-only tasks only, chosen from the server's own tool list. 5 of 5 tasks passed.
Automated handshake
Works HTTP 200, 1414 ms, checked Fri, 16 Oct 2026 17:08:21 GMT
Gotchas
None recorded yet. Gotchas come only from hands-on tests.
FAQ
Does the can-i-use MCP server work?
In our hands-on test on Oct 17, 2026, 5 of 5 tasks passed.
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