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

Preflight before paying an x402 service: is it working right now, and did it work the past

Preflight before paying an x402 service: is it working right now, and did it work the past 30 days? One live probe of the exact resource URL you intend to pay (status, latency, x402 validity, the payTo/price the service itself publishes in its 402, manifest presence) plus our own monitoring history of the host (30-day uptime, last check, recent changes such as payTo or price drift). Optionally verifies that the pay_to you intend to pay matches the live 402. Facts only — no scores.

Do you run agentdata-api.sander-van-aard.workers.dev? This listing was mirrored from Coinbase's public Bazaar. Claim it in 30 seconds — no account required — and it becomes verified, permanently overriding the mirrored copy.

Claim this listing
10000 (raw units)
price
1
calls / 30d
1
unique payers
2026-08-30
updated

Provider

agentdata-api.sander-van-aard.workers.dev · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xb0ae6a9bd7a573ddda58db6c28622417e8ca2099",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "maxTimeoutSeconds": 120
  }
]

Output schema

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "pay_to": "0x0000000000000000000000000000000000000001",
          "resource": "https://api.example-service.com/data"
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      },
      "output": {
        "example": {
          "checked_at": "2026-07-14T08:00:00.000Z",
          "history": {
            "hosts": [
              {
                "host": "api.example-service.com",
                "uptime_30d_pct": 99.1
              }
            ],
            "monitored": true
          },
          "live": {
            "latency_ms": 320,
            "manifest_present": true,
            "observed_pay_to": "0x0000000000000000000000000000000000000001",
            "pay_to_matches_live": true,
            "status": "ok_402"
          },
          "status_page": "https://x402-monitor.sander-van-aard.workers.dev/status/api.example-service.com"
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "body": {
              "type": "object"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            },
            "headers": {
              "additionalProperties": {
                "type": "string"
              },
              "type": "object"
            },
            "method": {
              "enum": [
                "POST",
                "PUT",
                "PATCH"
              ],
              "type": "string"
            },
            "queryParams": {
              "additionalProperties": {
                "type": "string"
              },
              "type": "object"
            },
            "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://agentdata-api.sander-van-aard.workers.dev/x402/preflight"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://agentdata-api.sander-van-aard.workers.dev/x402/preflight");
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://agentdata-api.sander-van-aard.workers.dev/x402/preflight")
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/6273.json, and this resource appears in /discovery/resources and /discovery/search.