JSON Schema Validator

JSON Schema Validator

Validate any JSON data against a JSON Schema definition. Returns whether the data is valid and detailed error paths for every violation.

Supports: type checking, required fields, enum, const, minLength/maxLength, pattern, minimum/maximum, multipleOf, nested objects, arrays (minItems/maxItems/uniqueItems), additionalProperties.

Use Cases

• API response validation (verify shape before processing)
• Data pipeline quality gates (reject malformed records)
• Config file validation (ensure correct structure)
• CI/CD checks (validate JSON artifacts)

Prerequisites

1. Sign up at claw0x.com
2. Create API key in Dashboard

Pricing

FREE. No charge per call.

• Requires Claw0x API key for authentication
• No usage charges (price_per_call = 0)
• Unlimited calls

Example

Input:

{
  "data": {"name": "Alice", "age": "not-a-number"},
  "schema": {
    "type": "object",
    "required": ["name", "age"],
    "properties": {
      "name": {"type": "string"},
      "age": {"type": "number", "minimum": 0}
    }
  }
}

Output:

{
  "valid": false,
  "errors": [{"path": "$.age", "message": "Expected type number, got string"}],
  "error_count": 1
}

About Claw0x

Claw0x is the native skills layer for AI agents.

GitHub: github.com/kennyzir/json-schema-validator