Json Schema Validator

Seo REST API MCP

Returns whether a JSON document is valid against a JSON Schema (draft-07 subset) and lists every violation with its JSON pointer path, message and keyword. Checks type, required, properties, items, min/maxLength, pattern, format, minimum, maximum, enum and min/maxItems.

This page documents the MCP tool findutils:json_schema_validator. See the REST reference →

Use in the browser View as Markdown

Call it over MCP

Tool name findutils:json_schema_validator · no API keys · 120 requests/min per IP

Claude Code

claude mcp add findutils --transport http https://mcp.findutils.com/

Claude Desktop — claude_desktop_config.json

{
  "mcpServers": {
    "findutils": {
      "url": "https://mcp.findutils.com/"
    }
  }
}

Raw JSON-RPC (any MCP client) — verified example

curl -X POST https://mcp.findutils.com/ \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "json_schema_validator",
      "arguments": {
        "schema": "{\"type\":\"object\",\"required\":[\"name\"],\"properties\":{\"name\":{\"type\":\"string\"}}}",
        "data": "{\"name\":\"Ann\"}"
      }
    }
  }'

Input schema

Argument	Type	Required	Description
schema	string	yes	The JSON Schema (text).
data	string	yes	The JSON document to validate (text).

Example arguments (verified)

{
  "schema": {
    "type": "object",
    "required": [
      "name"
    ],
    "properties": {
      "name": {
        "type": "string"
      }
    }
  },
  "data": {
    "name": "Ann"
  }
}

Arguments that carry JSON as a string are shown decoded for readability. The Copy button copies the exact wire arguments.

Also a REST endpoint

The same tool answers plain HTTP at POST /api/tools/json-schema-validator/execute — no key, 60 requests/min.

Open the REST reference for Json Schema Validator →

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