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JSON Schema Infer
x402
JSON Schema Infer 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).
Infers a JSON Schema from a provided JSON data sample, returning a typed schema with required fields and property types.
Price / call$0.001
Success—
StatusUnknown
How this service works
Infer a basic JSON Schema (types, object properties, array item type) from an example document.
Output
Returns a JSON Schema object describing the inferred structure of the provided data, including property types (string, integer, boolean, etc.) and a list of required fields.
Example use cases
Auto-generate API contract from example
“I have a sample JSON response from an API I'm integrating with — {"id": 42, "username": "bob", "verified": false} — can you infer the JSON Schema so I can use it for validation?”
Validate data pipeline output structure
“Our pipeline produces records like {"product_id": "ABC123", "price": 9.99, "in_stock": true}. Can you derive a JSON Schema from that so I can use it to validate future records?”
Document unknown data format
“I received this JSON from a third-party service: {"event": "click", "timestamp": 1712345678, "user_id": "u_99"}. What JSON Schema does it follow — what are the types and required fields?”
Technical details
Endpoint
GEThttps://x402.agentindex.world/json/schema-infer?utm_source=zero.xyzWhen to prefer
Use this endpoint when you have a sample JSON object and need a machine-readable schema definition automatically — particularly useful for building validators, documenting APIs, or bootstrapping data contracts without manually writing schemas.
Side effects
- Missing or empty 'data' parameter returns an error or empty schema
- Malformed/non-JSON input may produce an incorrect or partial schema
- Deeply nested or polymorphic data may result in simplified or overly generic schema
- Payment failure (x402) if USDC balance on Base is insufficient
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| data | — |
Output
Schema · Response
{
"type": "json",
"example": {
"schema": {
"type": "object",
"required": [
"name",
"age",
"active"
],
"properties": {
"age": {
"type": "integer"
},
"name": {
"type": "string"
},
"active": {
"type": "boolean"
}
}
}
}
}Tags
x402
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