validate-json — Port 21 MCP Tool
validate-json
(validate json) is one of 31 tools on the
Port 21
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 Port 21 validate-json run in your project directory
- Claude Desktop Port 21 validate-json ~/Library/Application Support/Claude/claude_desktop_config.json
- Cursor Port 21 validate-json ~/.cursor/mcp.json
- VS Code Port 21 validate-json .vscode/mcp.json
- Zed Port 21 validate-json ~/.config/zed/settings.json
- Windsurf Port 21 validate-json ~/.codeium/windsurf/mcp_config.json
- Cline Port 21 validate-json ~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json
- Gemini CLI Port 21 validate-json ~/.gemini/settings.json
- Grok Port 21 validate-json .mcp.json (in your project root)
- ChatGPT Port 21 validate-json Settings → Connectors → Advanced → Developer mode
- Claude.ai Port 21 validate-json Settings → Connectors → Add custom connector
- LangChain Port 21 validate-json pip install langchain-mcp-adapters
Fastest route
claude mcp add --transport http port-21 https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/port-21/mcpOther tools on this server
- port-21
- 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.