{
  "markdown": "# JSON Validator API\n\n[![MCP Server](https://img.shields.io/badge/MCP-server-blue)](https://json-validator.api.klymax402.com/mcp)\n[![x402](https://img.shields.io/badge/payments-x402-6E56CF)](https://x402.org)\n[![License: MIT](https://img.shields.io/badge/license-MIT-green)](LICENSE)\n\nJSON validator with optional JSON Schema validation and structure stats. Pay-per-call via [x402](https://x402.org) (USDC on Base L2) -- no API key, no signup, no rate-limit wall.\n\nPart of the [klymax402](https://klymax402.com) marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.\n\n## Quickstart -- MCP\n\nAdd to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):\n\n```json\n{\n  \"mcpServers\": {\n    \"json-validator\": {\n      \"url\": \"https://json-validator.api.klymax402.com/mcp\"\n    }\n  }\n}\n```\n\n## Quickstart -- HTTP (x402)\n\n```bash\ncurl -X POST \"https://json-validator.api.klymax402.com/api/validate\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"json\":\"...\"}'\n# -> 402 Payment Required, with an x402 payment challenge in the response body\n```\n\nAny x402-aware client ([`@x402/fetch`](https://www.npmjs.com/package/@x402/fetch), [`x402-agent-tools`](https://www.npmjs.com/package/x402-agent-tools), ATXP) handles the 402 -> sign -> retry cycle automatically.\n\n## Tools\n\n| Tool | Method | Path | Price | Description |\n|---|---|---|---|---|\n| `data_validate_json` | POST | `/api/validate` | $0.003 | Validate JSON and optionally check against a JSON Schema |\n\n### `data_validate_json`\n\nUse this when you need to validate JSON syntax or validate JSON data against a JSON Schema. Returns validity status, parse errors, formatted JSON, and structure stats (depth, key count, arrays, total size). Do NOT use for password checking — use security_check_password. Do NOT use for hash generation — use crypto_generate_hash. Do NOT use for cron expressions — use util_parse_cron.\n\n**Parameters**\n\n| Name | Type | Required | Description |\n|---|---|---|---|\n| `json` | string | yes | JSON string to validate |\n| `schema` | object | no | Optional JSON Schema to validate against |\n\n## Example agent prompts\n\n- \"Validate JSON syntax or validate JSON data against a JSON Schema\"\n\n## Payment\n\n- Protocol: [x402](https://x402.org) -- HTTP-native pay-per-call, no signup, no API key\n- Network: Base L2 (`eip155:8453`)\n- Asset: USDC\n- Facilitator: Coinbase CDP (primary), PayAI (fallback)\n\n## Part of klymax402\n\n100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.\n\n- Catalog: https://klymax402.com/llms.txt\n- Full API reference: https://klymax402.com/llms-full.txt\n- Live stats: https://klymax402.com/stats\n\n## License\n\nMIT\n",
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  "sha": "c08242329f9377cdde38448276881b16019d12aa71ac38e1aaabeea00bb6b25b",
  "repo_slug": "br0ski777/json-validator-x402",
  "fonte": "repo",
  "truncated": false,
  "api": "https://agentalog.com/api/listings/mcp_io_github_br0ski777_json_validator_be02dada/readme"
}