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JSON Schema Validator
x402
JSON Schema Validator is a paid API for AI agents from x402.agentindex.world, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-10).
Validates a JSON data object against a provided JSON Schema and returns whether it is valid along with any validation errors
Price / call$0.001
Success—
StatusUnknown
How this service works
Validate a JSON document against a JSON Schema.
Output
Returns a JSON object with a boolean 'valid' field indicating whether the data conforms to the schema, and an 'errors' array listing any validation errors (empty if valid). Errors typically describe which field failed, what constraint was violated, and the expected vs actual value.
Example use cases
API response schema compliance check
“I just got a response from a third-party API and I need to make sure it matches our expected schema before processing it — can you validate this JSON payload against the schema I'll provide and tell me if anything is missing or wrong?”
User-submitted form data validation
“A user submitted this JSON form data and I need to verify it matches our required schema — check if all required fields are present and the types are correct, and list any errors if it fails.”
Config file structure verification
“Before deploying, can you validate this configuration JSON against our config schema to make sure nothing is malformed or missing required keys?”
Technical details
Endpoint
GEThttps://x402.agentindex.world/json/validate?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a lightweight, pay-per-call JSON Schema validation without setting up a local library or running code. Ideal for AI agents that receive dynamic JSON payloads and need to quickly verify structure before further processing. Prefer this over running code locally when the agent environment lacks execution capabilities or when you want a consistent, hosted validation service billed per use.
Side effects
- Malformed JSON in data or schema input causes parse error
- Schema with unsupported JSON Schema keywords may not validate correctly
- Missing data or schema parameter returns an error
- Very large or deeply nested schemas may time out
- Schema with circular references may cause unexpected behavior
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| data | — | |
| schema | object |
Output
Schema · Response
{
"type": "json",
"example": {
"valid": true,
"errors": []
}
}Tags
x402
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