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 HTTP endpoint POST /api/tools/json-schema-validator/execute. See the MCP reference →

Use in the browser View as Markdown

Call it over REST

POST https://api.findutils.com/api/tools/json-schema-validator/execute · no API keys · 60 requests/min per IP

Execute — verified arguments

curl -X POST https://api.findutils.com/api/tools/json-schema-validator/execute \
  -H "Content-Type: application/json" \
  -d '{
    "schema": "{\"type\":\"object\",\"required\":[\"name\"],\"properties\":{\"name\":{\"type\":\"string\"}}}",
    "data": "{\"name\":\"Ann\"}"
  }'

Parameter schema for this endpoint

curl https://api.findutils.com/api/tools/json-schema-validator

Interactive docs · OpenAPI 3.1 spec · All REST tools

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 an MCP tool

Claude, Cursor, and any MCP client can call this tool as findutils:json_schema_validator after one connect command.

Connect once

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

Open the MCP reference for Json Schema Validator →

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