Api Endpoint

HALOWERK kettenwerk

Checks one address on Ethereum, Base, Arbitrum, Optimism, Polygon or BNB Smart Chain against the open verification registry and against the chain itself. For a proxy the answer is deliberately split in two: whether the proxy is verified says almost nothing, whether the implementation it currently points to is verified is the real question, and both are reported separately with the implementation address read from the EIP-1967 storage slot, the EIP-1167 clone pattern or an implementation() call —

Open interactive test console

Offering

Provider: kette.halowerk.com
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://kette.halowerk.com/contract/verification
MIME type: application/json
First seen: 2026-10-16T01:52:52.778Z
Last seen: 2026-11-02T19:45:49.973Z
Tags: None supplied

Website

Payment pricing

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

Payment option 1: 0.004 USDC
Atomic price: 4000 · Network: eip155:8453 · Asset: USDC · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "4000",
    "payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E"
  }
]

Observed health

Status: Healthy
Latest latency: 316 ms
Average latency: 314 ms
HTTP status: 204
Last checked: 2026-11-03T13:47:55.668Z
Reachability: 100% over 8 checks

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

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "POST",
        "PUT",
        "PATCH"
      ]
    },
    "bodyType": {
      "type": "string",
      "enum": [
        "json",
        "form-data",
        "text"
      ]
    },
    "body": {
      "type": "object",
      "required": [
        "chain",
        "address"
      ],
      "additionalProperties": false,
      "properties": {
        "chain": {
          "type": "string",
          "enum": [
            "ethereum",
            "base",
            "arbitrum",
            "optimism",
            "polygon",
            "bsc"
          ],
          "description": "Chain the contract lives on."
        },
        "address": {
          "type": "string",
          "pattern": "^0x[0-9a-fA-F]{40}$",
          "description": "Contract address."
        }
      }
    }
  },
  "required": [
    "type",
    "method",
    "bodyType",
    "body"
  ],
  "additionalProperties": false
}

Output schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "input": {
      "type": "object",
      "properties": {
        "type": {
          "type": "string",
          "const": "http"
        },
        "method": {
          "type": "string",
          "enum": [
            "POST",
            "PUT",
            "PATCH"
          ]
        },
        "bodyType": {
          "type": "string",
          "enum": [
            "json",
            "form-data",
            "text"
          ]
        },
        "body": {
          "type": "object",
          "required": [
            "chain",
            "address"
          ],
          "additionalProperties": false,
          "properties": {
            "chain": {
              "type": "string",
              "enum": [
                "ethereum",
                "base",
                "arbitrum",
                "optimism",
                "polygon",
                "bsc"
              ],
              "description": "Chain the contract lives on."
            },
            "address": {
              "type": "string",
              "pattern": "^0x[0-9a-fA-F]{40}$",
              "description": "Contract address."
            }
          }
        }
      },
      "required": [
        "type",
        "method",
        "bodyType",
        "body"
      ],
      "additionalProperties": false
    }
  },
  "required": [
    "input"
  ]
}