validate_json — Payload Validator MCP Tool
validate_json
(validate json) is one of 5 tools on the
Payload Validator
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 Payload Validator validate_json run in your project directory
- Claude Desktop Payload Validator validate_json ~/Library/Application Support/Claude/claude_desktop_config.json
- Cursor Payload Validator validate_json ~/.cursor/mcp.json
- VS Code Payload Validator validate_json .vscode/mcp.json
- Zed Payload Validator validate_json ~/.config/zed/settings.json
- Windsurf Payload Validator validate_json ~/.codeium/windsurf/mcp_config.json
- Cline Payload Validator validate_json ~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json
- Gemini CLI Payload Validator validate_json ~/.gemini/settings.json
- Grok Payload Validator validate_json .mcp.json (in your project root)
- ChatGPT Payload Validator validate_json Settings → Connectors → Advanced → Developer mode
- Claude.ai Payload Validator validate_json Settings → Connectors → Add custom connector
- LangChain Payload Validator validate_json pip install langchain-mcp-adapters
Fastest route
claude mcp add --transport http payload-validator https://payload-validator.gumballtools.com/api/mcpOther tools on this server
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.