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