Index onlineMerchant portal
Api Endpoint

Spend Check

Spend Check: should you pay this counterparty? Watchtower track record, CDP merchant catalog, and address hygiene combined into a clear/caution/avoid verdict with a signed attestation. $0.005 USDC per check.

Open interactive test console

Offering

Provider
attester.dev
Method
POST
Offering type
Api Endpoint
Transport type
http
Category
Blockchain And Crypto
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://attester.dev/spend-check
MIME type
Not provided
First seen
2026-10-16T01:50:10.647Z
Last seen
Tags
Risk, counterparty, Payments, X402, Agents

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1
0.005 USDC
Atomic price: 5000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "payTo": "0x57407D691F755cAa107647718F3582a8A87467dD"
  }
]

Observed health

Status
Unreachable
Latest latency
5155 ms
Average latency
1876 ms
HTTP status
Not provided
Last checked
Reachability
71.4% over 14 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "body": {
    "amount_usd": 0.25,
    "payTo": "attester.dev"
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
}

Output schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "body": {
          "properties": {
            "amount_usd": {
              "description": "Optional planned payment amount",
              "type": [
                "number",
                "null"
              ]
            },
            "payTo": {
              "description": "0x address or URL of the counterparty",
              "type": "string"
            }
          },
          "required": [
            "payTo"
          ],
          "type": "object"
        },
        "bodyType": {
          "enum": [
            "json"
          ],
          "type": "string"
        },
        "method": {
          "enum": [
            "POST"
          ],
          "type": "string"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method",
        "bodyType",
        "body"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "type": "object"
        }
      },
      "required": [
        "example"
      ],
      "type": "object"
    }
  },
  "required": [
    "input"
  ]
}