561 Group Market

HTML Body Text Nodes

Extract body text nodes in parsed DOM order, retaining their boundaries and original UTF-16 source spans, plus their direct concatenation without invented separators. Native HTML rules decode references and normalize source line endings. Head, script, style, template and noscript content is excluded. This is text-node extraction, not CSS-visible text, layout or Markdown. Limits65536 input UTF-8 bytes,8192 nodes/attributes,depth64,1048576 result JSON bytes. No scripts or fetching.

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/html-body-text
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",
    "required": [
      "html"
    ],
    "properties": {
      "html": {
        "type": "string",
        "maxLength": 65536,
        "description": "Maximum65536decoded UTF-8 bytes; full JSON escaping fits the request envelope."
      }
    },
    "additionalProperties": false
  }
}

Example request

{
  "method": "POST",
  "url": "https://market.561.group/v1/data/html-body-text",
  "headers": {
    "accept": "application/json",
    "content-type": "application/json"
  },
  "body": {
    "html": "<title>Head</title><p>A &amp; B<br>next<script>ignored()</script><template><a href=\"/inert\">hidden</a></template><a href=\"/post?x=&amp;amp;\">link</a>"
  }
}

Output

{
  "schema": {
    "type": "object",
    "required": [
      "text",
      "nodes",
      "byteLength",
      "sourceByteLength",
      "offsetUnit"
    ],
    "properties": {
      "text": {
        "type": "string"
      },
      "nodes": {
        "type": "array",
        "items": {
          "type": "object",
          "required": [
            "text",
            "source"
          ],
          "properties": {
            "text": {
              "type": "string"
            },
            "source": {
              "type": [
                "object",
                "null"
              ],
              "properties": {
                "start": {
                  "type": "integer"
                },
                "end": {
                  "type": "integer"
                }
              }
            }
          }
        }
      },
      "byteLength": {
        "type": "integer",
        "minimum": 0
      },
      "sourceByteLength": {
        "type": "integer",
        "minimum": 0
      },
      "offsetUnit": {
        "const": "UTF-16 code units"
      }
    }
  },
  "example": {
    "text": "A & Bnextlink",
    "nodes": [
      {
        "text": "A & B",
        "source": {
          "start": 22,
          "end": 31
        }
      },
      {
        "text": "next",
        "source": {
          "start": 35,
          "end": 39
        }
      },
      {
        "text": "link",
        "source": {
          "start": 141,
          "end": 145
        }
      }
    ],
    "byteLength": 13,
    "sourceByteLength": 149,
    "offsetUnit": "UTF-16 code units"
  }
}

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 '{"html":"<title>Head</title><p>A &amp; B<br>next<script>ignored()</script><template><a href=\"/inert\">hidden</a></template><a href=\"/post?x=&amp;amp;\">link</a>"}' --url 'https://market.561.group/v1/data/html-body-text'

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

Machine-readable