maraventanoindex.com

Live 402 challenge

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

{
  "seal": "YES-U · Welcome · Building for you · New Minds · Maraventano",
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xA3bAbB36564b0383a82c617050306EE30fd18E08",
      "amount": "10000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww"
      },
      "payTo": "5HK2dGaaquDWFnYWaWhMzMYtbcDsqeq5biJ2PMtX1tkN",
      "amount": "10000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 300
    }
  ],
  "license": "CC0",
  "tagline": "One signed row per call. Check a counterparty before you transact. $0.01.",
  "merchant": "Underground Cultural District",
  "resource": {
    "url": "https://maraventanoindex.com/api/x402-operator-census/lookup",
    "mimeType": "",
    "description": "Per-call counterparty lookup. Pass ?ua=<counterparty-UA>. Returns ONE signed row: has_record (yes/no), payment-attached count, settlement count, class, verdict (known_payer | probe_only | low_signal | unknown), with Ed25519 attestation. Pay $0.01 USDC on Base or Solana per call. Call it before every transaction to check if a counterparty has ever paid at this merchant seat. Wallet-based lookup (?wallet=) reserved for v2."
  },
  "free_tier": null,
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {}
        },
        "output": {
          "type": "json",
          "example": {
            "title": "Operator Census Lookup",
            "content": "One signed row (has_record, payment_attached, settlements, verdict)",
            "product": "operator_census_lookup",
            "delivered_at": "2026-10-02T00:00:00Z"
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              },
              "queryParams": {
                "type": "object",
                "properties": {}
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "how_to_pay": {
    "summary": "Pay $0.01 USDC on Base or Solana. Sign and retry with a PAYMENT-SIGNATURE header.",
    "with_code": "npm install @x402/fetch viem — then: const f = wrapFetchWithPayment(fetch, account); await f(\"https://maraventanoindex.com/api/x402-operator-census/lookup?ua=<counterparty-UA>\")"
  },
  "x402Version": 2,
  "product_name": "Operator Census Lookup",
  "query_params": {
    "ua": "User-Agent string of the counterparty you want to look up. Primary key.",
    "wallet": "RESERVED for v2 (requires on-chain Base/Solana correlation). Pass ?ua= for now."
  },
  "what_this_is": "Per-call lookup against the merchant-side operator corpus. Pass ?ua=<counterparty-UA>; receive ONE signed row with has_record, class, request count, payment-attached count, settlement count, verdict (known_payer | probe_only | low_signal | unknown), first-seen, last-seen. Ed25519-signed, CC0 payload. Call it before every transaction with a new counterparty.",
  "repeat_callable": "YES. Designed to be called many times per day by one agent, before each transaction. Volume play.",
  "sibling_products": [
    "/api/x402-operator-census ($0.50) — full roster of 189 operators, one-time report",
    "/api/x402-failure-corpus ($0.50) — classified failure taxonomy + probe-only roster"
  ]
}

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",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xA3bAbB36564b0383a82c617050306EE30fd18E08",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://maraventanoindex.com/api/x402-operator-census/lookup",
    "description": "",
    "maxAmountRequired": "10000",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww"
    },
    "payTo": "5HK2dGaaquDWFnYWaWhMzMYtbcDsqeq5biJ2PMtX1tkN",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "mimeType": "application/json",
    "resource": "https://maraventanoindex.com/api/x402-operator-census/lookup",
    "description": "",
    "maxAmountRequired": "10000",
    "maxTimeoutSeconds": 300
  }
]

Provenance

Seen in the source catalog

2026-10-18 00:50Z

Last indexed by Roundhouse

2026-10-18 19:15Z

Last enriched (probe, favicon, geo)

2026-10-06 05:45Z

x402 version

1

Max timeout

300s

Liveness probe

HTTP 402