JSON Validator — Syntax Check & Schema Validation

JSON validation API for AI agents. Validate JSON syntax, check against JSON Schema, and get formatted output. Returns validity status, parse errors with line numbers, structure stats (depth, key count, size). Tools: data_validate_json. Use this for API response validation, config file checking, or data pipeline quality gates. Returns machine-readable error details for automated fixing. Returns: {valid, errors[], formatted, stats}. No API key required — x402 micropayment $0.001/call on Base L2.