validate-json — Whether current UTC year has Feb 29 MCP Tool
validate-json
(validate json) is one of 31 tools on the
Whether current UTC year has Feb 29
MCP server. Connect the server and your client discovers it on the handshake.
by client
How to call validate-json from your client
- Claude Code Whether current UTC year has Feb 29 validate-json run in your project directory
- Claude Desktop Whether current UTC year has Feb 29 validate-json ~/Library/Application Support/Claude/claude_desktop_config.json
- Cursor Whether current UTC year has Feb 29 validate-json ~/.cursor/mcp.json
- VS Code Whether current UTC year has Feb 29 validate-json .vscode/mcp.json
- Zed Whether current UTC year has Feb 29 validate-json ~/.config/zed/settings.json
- Windsurf Whether current UTC year has Feb 29 validate-json ~/.codeium/windsurf/mcp_config.json
- Cline Whether current UTC year has Feb 29 validate-json ~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json
- Gemini CLI Whether current UTC year has Feb 29 validate-json ~/.gemini/settings.json
- Grok Whether current UTC year has Feb 29 validate-json .mcp.json (in your project root)
- ChatGPT Whether current UTC year has Feb 29 validate-json Settings → Connectors → Advanced → Developer mode
- Claude.ai Whether current UTC year has Feb 29 validate-json Settings → Connectors → Add custom connector
- LangChain Whether current UTC year has Feb 29 validate-json pip install langchain-mcp-adapters
Fastest route
claude mcp add --transport http leap-day https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/leap-day/mcpOther tools on this server
- leap-day
- utc-time
- timezone
- normalize-url
- inspect-robots
- domain-shape
- citation
- compatibility
- 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.