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klymax402 JSON Validator
x402
klymax402 JSON Validator is a paid API for AI agents from klymax402.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).
Validates a JSON string for syntax correctness, optionally validating it against a provided JSON Schema
Price / call$0.003
Success—
StatusUnknown
How this service works
One MCP endpoint gives your AI agent access to 100 APIs -- crypto, DeFi, web, AI, finance and utilities. No API keys, USDC on Base from $0.003/call.
Output
Returns a validation result indicating whether the JSON string is syntactically valid and, if a schema is provided, whether it conforms to that schema. Includes specific error messages describing any syntax errors or schema violations found.
Example use cases
Validate API response before processing
“Before I process this API response, can you confirm the JSON is valid and matches my expected schema with fields 'id' (integer), 'status' (string), and 'items' (array)? Here's the raw JSON: '{"id":42,"status":"active","items":[1,2,3]}'”
Debug malformed config file
“I'm getting a parse error somewhere in my config — can you validate this JSON string and tell me exactly where it's broken: '{"host":"localhost","port":8080,"debug":true,"tags":["web","api"]'”
Schema compliance check for data pipeline
“I need to verify that this JSON payload conforms to my pipeline schema before I send it downstream — the JSON is '{"event":"click","userId":"u_123","timestamp":1700000000}' and the schema requires event and userId to be strings and timestamp to be a number.”
Technical details
Endpoint
GEThttps://klymax402.com/api/json-validator/api/validateWhen to prefer
Use this endpoint when you need a quick, pay-per-use JSON validation without setting up your own validator or managing API keys. Ideal for agents that occasionally need to verify JSON correctness or schema compliance as part of a larger workflow, especially when already using the klymax402 suite of APIs via a single MCP endpoint.
Side effects
- Malformed input where 'json' parameter is empty or missing returns an error
- Invalid or malformed JSON Schema object causes schema-validation step to fail
- Very large JSON strings may time out or be rejected
- Network or payment failure returns a 402 Payment Required or connection error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| json | string | JSON string to validate |
| schema | object | Optional JSON Schema to validate against |
Tags
x402
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