JSON Schema validate · Json Validate

by JSON Schema validate

POSTBaseSolanaArbitrumPolygonMonadAvalancheeip155:1329OptimismFraxtaleip155:42220stellar:pubnetalgorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=

$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-validate

4

Calls / 30d

1

Unique payers / 30d

Aug 31

Last called

exact

Payment scheme

Call this service

TypeScript · @x402/fetch
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
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

Pay to0xabf4fabd7c416fb67202e5f9002389fc75e2a9d0
AssetUSD Coin · 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913
NetworksBase, Solana, Arbitrum, Polygon, Monad, Avalanche, eip155:1329, Optimism, Fraxtal, eip155:42220, stellar:pubnet, algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=
Schemesexact, upto

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