JSON Schema validate · Json Validate
$0.002
per call · USD Coin on Base
Validate a JSON document against a JSON Schema (draft-07 subset) and get the list of violations. Supports type, required, properties, items, enum, const, min/max, length, pattern, format, anyOf/allOf/oneOf/not, additionalProperties. Deterministic - check an agent's structured output before you trust it.
Endpoint
POST https://agent402.tools/api/json-validate4
Calls / 30d
1
Unique payers / 30d
Aug 31
Last called
exact
Payment scheme
Call this service
import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";
const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPay = wrapFetchWithPayment(fetch, account);
const res = await fetchWithPay("https://agent402.tools/api/json-validate", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({
"data": {
"age": 3,
"name": "x"
},
"schema": {
"properties": {
"age": {
"minimum": 0,
"type": "integer"
},
"name": {
"type": "string"
}
},
"required": [
"name"
],
"type": "object"
}
}),
});
const data = await res.json();curl -X POST \
"https://agent402.tools/api/json-validate" \
-H "Content-Type: application/json" \
-d '{"data":{"age":3,"name":"x"},"schema":{"properties":{"age":{"minimum":0,"type":"integer"},"name":{"type":"string"}},"required":["name"],"type":"object"}}' \
-H "X-PAYMENT: <signed x402 payment>"Example response
{
"errors": [],
"valid": true
}Payment details
0xabf4fabd7c416fb67202e5f9002389fc75e2a9d0USD Coin · 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913Is this your API?
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