561 Group Market

JSON Changes to RFC 6902 Patch

Generate an interoperable RFC 6902 patch transforming before into after. Escapes JSON Pointer keys and uses deterministic object-key and positional array edits. Not a minimal-patch optimizer. Up to 128 operations. Ordinary finite JSON, valid Unicode; 64 KiB canonical request/result, depth 64, 8192 nodes, 4096 array elements.

Price
from $0.0012 USDC per request (starting price; the 402 response quotes the exact amount for your input)
Network
Base mainnet, eip155:8453, settled in USDC through the Coinbase CDP facilitator
Method and URL
POST https://market.561.group/v1/data/json-patch-create
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": 1048576,
  "bodySchema": {
    "type": "object",
    "additionalProperties": false,
    "properties": {
      "before": {},
      "after": {}
    },
    "required": [
      "before",
      "after"
    ]
  }
}

Example request

{
  "method": "POST",
  "url": "https://market.561.group/v1/data/json-patch-create",
  "headers": {
    "accept": "application/json",
    "content-type": "application/json"
  },
  "body": {
    "before": {
      "a/b": 1,
      "old": true
    },
    "after": {
      "a/b": 2,
      "new": [
        3
      ]
    }
  }
}

Output

{
  "schema": {
    "type": "array",
    "maxItems": 128,
    "items": {
      "type": "object",
      "required": [
        "op",
        "path"
      ],
      "properties": {
        "op": {
          "type": "string",
          "enum": [
            "add",
            "remove",
            "replace",
            "move",
            "copy",
            "test"
          ]
        },
        "path": {
          "type": "string",
          "description": "RFC 6901 string pointer; empty string addresses the root. URI fragments are not patch paths."
        },
        "from": {
          "type": "string",
          "description": "Required by move and copy; RFC 6901 string pointer."
        },
        "value": {
          "description": "Required by add, replace and test; any admitted JSON value."
        }
      },
      "description": "RFC 6902 operation. Undefined operation members are ignored. Conditional value/from requirements are enforced by native admission."
    }
  },
  "example": [
    {
      "op": "remove",
      "path": "/old"
    },
    {
      "op": "add",
      "path": "/new",
      "value": [
        3
      ]
    },
    {
      "op": "replace",
      "path": "/a~1b",
      "value": 2
    }
  ]
}

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 '{"before":{"a/b":1,"old":true},"after":{"a/b":2,"new":[3]}}' --url 'https://market.561.group/v1/data/json-patch-create'

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

Machine-readable