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mirrored listing x402 eip155:8453

x402 PayTo Pre-Flight: verify a payTo address against the live registry before paying

x402 PayTo Pre-Flight: verify a payTo address against the live registry before paying. Detects payTo hijacking, stale endpoints and unknown resources. Deterministic, <200ms, no external network. 0.001 USDC via x402 on Base. SYNTHORA.

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10000 (raw units)
price
2
calls / 30d
2
unique payers
2026-09-05
updated

Provider

payto-preflight.hergertsynthora.com · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xEf879BFD6C4AccB8F795136de90246e1EC245e06",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "maxTimeoutSeconds": 300
  }
]

Output schema

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "chain": "eip155:8453",
          "endpoint_url": "https://onchain.hergertsynthora.com/service",
          "expected_payTo": "0xEf879BFD6C4AccB8F795136de90246e1EC245e06"
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      },
      "output": {
        "example": {
          "niche": "payto_preflight",
          "ok": true,
          "result": {
            "active": true,
            "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
            "chain_ok": true,
            "checked_at": "2026-08-07T21:00:00Z",
            "endpoint": "https://onchain.hergertsynthora.com/service",
            "expected_payTo": "0xEf879BFD6C4AccB8F795136de90246e1EC245e06",
            "freshness_s": 120,
            "live_payTo": "0xEf879BFD6C4AccB8F795136de90246e1EC245e06",
            "match_kind": "exact",
            "matched": true,
            "network": "eip155:8453",
            "price_usd": 0.001,
            "reason": "payTo vivo coincide con el esperado, endpoint active y fresco",
            "source": "scout_resource",
            "verdict": "safe"
          }
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "body": {
              "properties": {
                "chain": {
                  "description": "expected chain, e.g. eip155:8453",
                  "type": "string"
                },
                "endpoint_url": {
                  "description": "endpoint resource URL to verify",
                  "type": "string"
                },
                "expected_payTo": {
                  "description": "expected payTo address (0x...)",
                  "type": "string"
                }
              },
              "required": [
                "endpoint_url"
              ],
              "type": "object"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            },
            "method": {
              "enum": [
                "POST",
                "PUT",
                "PATCH"
              ],
              "type": "string"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "niche": {
                "type": "string"
              },
              "ok": {
                "type": "boolean"
              },
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

Use it

curl

curl "https://payto-preflight.hergertsynthora.com/service"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://payto-preflight.hergertsynthora.com/service");
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://payto-preflight.hergertsynthora.com/service")
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/12479.json, and this resource appears in /discovery/resources and /discovery/search.