buero.halowerk.com

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "docs": "https://buero.halowerk.com/llms.txt",
  "name": "email_list_clean",
  "error": "payment_required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "asset": "USDC",
        "version": "2",
        "eip712Domain": {
          "name": "USD Coin",
          "chainId": 8453,
          "version": "2",
          "verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
        },
        "network_name": "Base Mainnet",
        "assetTransferMethod": "eip3009"
      },
      "payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
      "amount": "3000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "pricing": "https://buero.halowerk.com/pricing",
  "resource": {
    "url": "https://buero.halowerk.com/v1/email-list-clean",
    "mimeType": "application/json",
    "description": "Up to 500 input addresses, billed per supplied row including duplicates/invalid rows: 0.0001 USDC per address, minimum 0.003 and maximum 0.050. Reuses the existing mail checker; one inflight domain lookup is shared within the bounded process and existing domain cache is retained. Original rows, exact-local-part/IDNA-domain duplicates, candidates, removals and review cases remain traceable. No mailbox proof without SMTP; SMTP disabled, catch-all unknown, no email sent."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "emails": [
              "list-demo@gmail.com",
              "list-demo@GMAIL.COM",
              "info@gmail.com",
              "invalid-address",
              "someone@example.invalid"
            ]
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "type": "object",
                "required": [
                  "emails"
                ],
                "properties": {
                  "emails": {
                    "type": "array",
                    "items": {
                      "type": "string",
                      "maxLength": 320,
                      "minLength": 1
                    },
                    "maxItems": 500,
                    "minItems": 1
                  }
                },
                "additionalProperties": false
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          }
        }
      }
    }
  },
  "price_usdc": "0.003000",
  "description": "Up to 500 input addresses, billed per supplied row including duplicates/invalid rows: 0.0001 USDC per address, minimum 0.003 and maximum 0.050. Reuses the existing mail checker; one inflight domain lookup is shared within the bounded process and existing domain cache is retained. Original rows, exact-local-part/IDNA-domain duplicates, candidates, removals and review cases remain traceable. No mailbox proof without SMTP; SMTP disabled, catch-all unknown, no email sent. Local part case preserved; no guessed typo correction or plus/dot folding. Exactly one list-cleaning process globally, 65 second timeout, no queue/background job/callback. One MiB email JSON transport bound. DNS timeout 1000 ms; unresolved domains are review cases, not fabricated invalid domains. Existing mail routes/configuration unchanged. Errors 400 schema, 413 transport, 502 invalid checker output, 503 busy/unavailable/timeout. Failed work is not settled. Input archive holds row count only.",
  "inputSchema": {
    "type": "object",
    "required": [
      "emails"
    ],
    "properties": {
      "emails": {
        "type": "array",
        "items": {
          "type": "string",
          "maxLength": 320,
          "minLength": 1
        },
        "maxItems": 500,
        "minItems": 1
      }
    },
    "additionalProperties": false
  },
  "price_basis": {
    "unit": "input address",
    "units": 1
  },
  "price_model": {
    "kind": "per_unit",
    "unit": "input address",
    "max_usdc": "0.050",
    "min_usdc": "0.003",
    "max_units": 500,
    "unit_price_usdc": "0.0001"
  },
  "x402Version": 2,
  "instructions": "Sign the accepted terms with an x402 client and repeat the request with the payment header.",
  "payment_header": "PAYMENT-SIGNATURE",
  "capability_request": {
    "url": "https://bedarf.halowerk.com/capabilities/request",
    "cost": "free",
    "method": "POST",
    "description": "Missing a capability, or does the scope not fit? Report the need here - no payment required. Similar reports are bundled; the response returns an id you can check back on.",
    "body_example": {
      "max_price": 0.01,
      "description": "what exactly is needed",
      "requested_capability": "short label"
    }
  }
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://buero.halowerk.com/v1/email-list-clean",
    "description": "",
    "maxAmountRequired": "3000",
    "maxTimeoutSeconds": 300
  }
]

Provenance

Seen in the source catalog

2026-10-09 05:47Z

Last indexed by Roundhouse

2026-10-20 00:15Z

Last enriched (probe, favicon, geo)

2026-10-10 15:46Z

x402 version

1

Max timeout

300s

Liveness probe

HTTP 402