Saylor Innovations Agent Bazaar by Saylor Innovations
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mirrored listing x402 eip155:8453

Cheap agent-ready change check for one HTTPS page

Cheap agent-ready change check for one HTTPS page. Supply 1-5 watched field baselines; returns unchanged only when every enrolled baseline is still provably present, otherwise requires_fallback without falsely claiming a change.

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Claim this listing
2000 (raw units)
price
1
calls / 30d
1
unique payers
2026-09-10
updated

Provider

agentwholesale.vercel.app · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x07851F02F4b0e85f18f5EF06a4545B713eAA39Fe",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "2000",
    "maxTimeoutSeconds": 300
  }
]

Output schema

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "fields": [
            {
              "baselineText": "$20",
              "field": "price"
            }
          ],
          "url": "https://example.com/pricing"
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      },
      "output": {
        "example": {
          "data": {
            "checks": [
              {
                "baselineStillPresent": true,
                "field": "price"
              }
            ],
            "state": "unchanged",
            "url": "https://example.com/pricing"
          },
          "meta": {
            "product": "change-check",
            "retailUsd": 0.002
          }
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "body": {
              "properties": {
                "fields": {
                  "items": {
                    "properties": {
                      "baselineText": {
                        "type": "string"
                      },
                      "field": {
                        "type": "string"
                      }
                    },
                    "required": [
                      "field",
                      "baselineText"
                    ],
                    "type": "object"
                  },
                  "maxItems": 5,
                  "minItems": 1,
                  "type": "array"
                },
                "url": {
                  "description": "Public HTTPS page to check.",
                  "type": "string"
                }
              },
              "required": [
                "url",
                "fields"
              ]
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

Use it

curl

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

JavaScript

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

Python

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

Machine-readable

Everything on this page is also available as clean JSON at /resources/14615.json, and this resource appears in /discovery/resources and /discovery/search.