mirrored listing x402 eip155:8453

Assess an x402 counterparty before paying

Assess an x402 counterparty before paying. POST {target:{payto_address}, payment_context?, policy?}; payto may be a 0x EVM (Base) or base58 Solana seller. Returns risk_score 0-100, decision allow/review/block, confidence, coverage, per-dimension signals, key_factors (what drove the score) and a ready-to-apply recommended_policy. Scored from on-chain settlement behaviour, OFAC sanctions = hard block.

2000 (raw units)

price

calls / 30d

unique payers

2026-09-14

updated

Provider

402sentinel.com · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x1A9Fa76f5b420e85DE147C4419638BEbE64D6dE5",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "2000",
    "maxTimeoutSeconds": 300
  }
]

Output schema

{
  "bazaar": {
    "info": {
      "input": {
        "body": {},
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "body": {
              "properties": {
                "payment_context": {
                  "description": "Optional context about the payment being considered.",
                  "properties": {
                    "amount": {
                      "type": "number"
                    },
                    "asset": {
                      "description": "e.g. \"USDC\"",
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "policy": {
                  "description": "Optional caller policy hints.",
                  "type": "object"
                },
                "target": {
                  "description": "The x402 seller to score.",
                  "properties": {
                    "payto_address": {
                      "description": "Address that receives the payment — 0x EVM (Base) OR base58 Solana.",
                      "type": "string"
                    }
                  },
                  "required": [
                    "payto_address"
                  ],
                  "type": "object"
                }
              }
            },
            "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"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

Use it

curl

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

JavaScript

const res = await fetch("https://402sentinel.com/api/assess");
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://402sentinel.com/api/assess")
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/15393.json, and this resource appears in /discovery/resources and /discovery/search.