561 Group Market

JSON Schema Validate

Validate one JSON value against one JSON Schema document (2020-12), with an optional corpus of referenced schemas; reports every violation, not just the first.

Price
$0.005 USDC per request
Network
Base mainnet, eip155:8453, settled in USDC through the Coinbase CDP facilitator
Method and URL
POST https://market.561.group/v1/schema/validate
Response type
application/json
Seller
Causeway Services (561 Group)

Input contract

Input that fails this contract is refused with a 4xx status before any payment is requested.

{
  "maxBytes": 102400,
  "bodySchema": {
    "type": "object",
    "properties": {
      "schema": {
        "type": "object"
      },
      "value": {},
      "schemas": {
        "type": "array"
      }
    },
    "required": [
      "schema",
      "value"
    ]
  }
}

Example request

{
  "method": "POST",
  "url": "https://market.561.group/v1/schema/validate",
  "headers": {
    "accept": "application/json",
    "content-type": "application/json"
  },
  "body": {
    "schema": {
      "type": "object",
      "required": [
        "name"
      ],
      "properties": {
        "name": {
          "type": "string"
        }
      }
    },
    "value": {
      "name": 5
    }
  }
}

Output

{
  "schema": {
    "type": "object",
    "properties": {
      "valid": {
        "type": "boolean"
      },
      "errors": {
        "type": "array"
      }
    }
  },
  "example": {
    "valid": false,
    "errors": [
      {
        "kind": "instance",
        "path": "/name",
        "keyword": "type",
        "message": "must be string"
      }
    ]
  }
}

How to buy with x402

  1. Send the request without payment. The server answers 402 Payment Required with a base64 JSON PAYMENT-REQUIRED header holding the amount, asset, network and payee.
  2. Have your wallet sign an EIP-3009 transferWithAuthorization for exactly those terms (an x402 client library does this for you).
  3. Repeat the identical request with the signed payload in the PAYMENT-SIGNATURE header.
  4. The server verifies, runs the operation, settles, and returns 200 with the result and a PAYMENT-RESPONSE header carrying the settlement receipt.

Read the price without paying

curl --include --request POST --header 'accept: application/json' --header 'content-type: application/json' --data-raw '{"schema":{"type":"object","required":["name"],"properties":{"name":{"type":"string"}}},"value":{"name":5}}' --url 'https://market.561.group/v1/schema/validate'

This request authorizes nothing; it returns the live payment terms. Read the full explanation of x402.

Machine-readable