Zero-shot text classification into caller-supplied labels; the result is validated back in

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x5253666c40432f009ebd99908b9cd2a7fd1019cb",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "2000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "FgcKNzsBXSEHGNZNWetPsjXiBZk1WFoU6sF2zVsnzXfa",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "2000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "labels": "billing,shipping,technical,other",
          "text": "My order never arrived and I want a refund"
        },
        "type": "http"
      },
      "output": {
        "example": {
          "confidence": 0.86,
          "input_chars": 42,
          "label": "shipping",
          "labels": [
            "billing",
            "shipping",
            "technical",
            "other"
          ],
          "model": "@cf/meta/llama-4-scout-17b-16e-instruct"
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "properties": {
                "labels": {
                  "description": "Comma-separated candidate labels (2-20)",
                  "type": "string"
                },
                "text": {
                  "description": "Text to classify",
                  "maxLength": 8000,
                  "type": "string"
                }
              },
              "required": [
                "text",
                "labels"
              ],
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

curl "https://quartermaster.surewhynot.app/v1/classify"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://quartermaster.surewhynot.app/v1/classify");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

import httpx
res = httpx.get("https://quartermaster.surewhynot.app/v1/classify")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header