Json Schema Validator API

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

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.

Open the tool Try it

Request body

application/json

schema

string required

The JSON Schema (text).
data

string required

The JSON document to validate (text).

Example arguments

Verified

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

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\"}"
  }'

const response = await fetch('https://api.findutils.com/api/tools/json-schema-validator/execute', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({"schema":"{\"type\":\"object\",\"required\":[\"name\"],\"properties\":{\"name\":{\"type\":\"string\"}}}","data":"{\"name\":\"Ann\"}"}),
});
const data = await response.json();

import requests

response = requests.post(
    "https://api.findutils.com/api/tools/json-schema-validator/execute",
    json={"schema":"{\"type\":\"object\",\"required\":[\"name\"],\"properties\":{\"name\":{\"type\":\"string\"}}}","data":"{\"name\":\"Ann\"}"},
)
data = response.json()

$ch = curl_init('https://api.findutils.com/api/tools/json-schema-validator/execute');
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => ['Content-Type: application/json'],
    CURLOPT_POSTFIELDS => '{"schema":"{\"type\":\"object\",\"required\":[\"name\"],\"properties\":{\"name\":{\"type\":\"string\"}}}","data":"{\"name\":\"Ann\"}"}',
    CURLOPT_RETURNTRANSFER => true,
]);
$data = json_decode(curl_exec($ch), true);

Also an MCP tool

Call json_schema_validator from Claude, Cursor or any MCP client. Same arguments, same output.

https://mcp.findutils.com

MCP reference

Rate limit: 60 a minute, per IP
Auth: None
REST id: json-schema-validator
MCP name: json_schema_validator
Category: SEO
Machine-readable: openapi.json · markdown.md

Request body

Example arguments

More SEO tools

More to explore