# JSON Schema Validator

> Validate JSON data against a JSON Schema. Use when agents need to verify API responses, validate pipeline data, check CI quality gates, or ensure config files match expected structure. Returns detailed error paths.

- Skill: `kennyzir/json-schema-validator` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add kennyzir/json-schema-validator`
- Raw SKILL.md: https://api.skillmd.com/api/skills/kennyzir/json-schema-validator/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: DevOps & Infra
- Author: kennyzir (https://skillmd.com/u/kennyzir)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/kennyzir/json-schema-validator

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# 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](https://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**:
```json
{
  "data": {"name": "Alice", "age": "not-a-number"},
  "schema": {
    "type": "object",
    "required": ["name", "age"],
    "properties": {
      "name": {"type": "string"},
      "age": {"type": "number", "minimum": 0}
    }
  }
}
```

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

## About Claw0x

[Claw0x](https://claw0x.com) is the native skills layer for AI agents.

**GitHub**: [github.com/kennyzir/json-schema-validator](https://github.com/kennyzir/json-schema-validator)