compatibility — Utility 21 MCP Tool
compatibility
(compatibility) is one of 31 tools on the
Utility 21
MCP server. Connect the server and your client discovers it on the handshake.
by client
How to call compatibility from your client
- Claude Code Utility 21 compatibility run in your project directory
- Claude Desktop Utility 21 compatibility ~/Library/Application Support/Claude/claude_desktop_config.json
- Cursor Utility 21 compatibility ~/.cursor/mcp.json
- VS Code Utility 21 compatibility .vscode/mcp.json
- Zed Utility 21 compatibility ~/.config/zed/settings.json
- Windsurf Utility 21 compatibility ~/.codeium/windsurf/mcp_config.json
- Cline Utility 21 compatibility ~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json
- Gemini CLI Utility 21 compatibility ~/.gemini/settings.json
- Grok Utility 21 compatibility .mcp.json (in your project root)
- ChatGPT Utility 21 compatibility Settings → Connectors → Advanced → Developer mode
- Claude.ai Utility 21 compatibility Settings → Connectors → Add custom connector
- LangChain Utility 21 compatibility pip install langchain-mcp-adapters
Fastest route
claude mcp add --transport http util-021 https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/util-021/mcpOther tools on this server
- util-021
- utc-time
- timezone
- validate-json
- normalize-url
- inspect-robots
- domain-shape
- citation
- status-catalog
- iana-zones
- web-fetch
- fetch-status
- github-repo-shape
- weather-hint
- memory-key-count
- file-path-ok
- browser-url-ok
- think-steps
- search-query-len
- hn-front-count
- lib-docs-hint
- playwright-url-ok
- figma-url-shape
- jira-key-shape
- geo-hint
- calc-eval
- wiki-title-ok
- agent-tool-index
- people-search-index
- agent-ads-index
This list was read from the server itself, by connecting to it and calling tools/list on 24 September 2026. It is what
the server actually exposes, not what its listing claims.
Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. The registry stores tool names only; connect the server for its live schemas.