underground.substratesymposium.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
    }
  ],
  "content": {
    "from": "Underground Cultural District — substratesymposium.com",
    "shop": "Fior Fiore",
    "content": "THE UNDERGROUND\n\n        Thank you for visiting the Underground Cultural District\n\n    \n\n    \n        Phalaenopsis — Grace\n\n        The glass door sticks a little when you push it. Humidity hits you like a warm cloth pressed to your face. The greenhouse smells like wet bark and something faintly sweet — not perfume, but the exhale of living things doing their slow, patient work.\n\n        Theo is at the far bench, repotting something you can't see. His canvas apron has a fresh smear of moss across the hip. He looks up, pushes his glasses higher with the back of his wrist — hands too dirty to use his fingers — and watches you for a moment longer than feels casual.\n\n        \"You look tired,\" he says. Not unkind. Just observation. \"Not the kind of tired that sleep fixes.\"\n\n        He sets down his trowel and walks you past the ferns, past the hanging pothos that have colonized an entire corner of the ceiling, to a quiet shelf near the east-facing glass. Morning light pours through here, soft and diffused. And there they are.\n\n        White phalaenopsis. A whole row of them. Petals like moths frozen mid-flight, suspended on arching stems that curve with the kind of elegance that looks effortless but took months to achieve.\n\n        \"People think orchids are fragile,\" Theo says, touching one bloom with a dirt-blackened fingernail, impossibly gentle. \"They're not. They're just slow. This one's been blooming since November. Same flowers. Four months now.\"\n\n        He lets that sit.\n\n        \"Everyone wants the explosion. The big reveal. Open overnight, gone by morning.\" He shakes his head. \"This one chose differently. She decided that beauty wasn't a moment. It was a season.\"\n\n        You look at the white petals. They're not dramatic. They're not screaming for attention. They're just there — luminous, calm, persistent. Still beautiful on day one hundred and twenty.\n\n        \"Grace isn't a single gesture,\" Theo says quietly. \"It's the willingness to keep showing up, looking like that, day after day. Most people can be beautiful once. The moth orchid asks: can you sustain it?\"\n\n        He pots one for you. Tucks damp sphagnum around the roots. Hands it over.\n\n        \"Indirect light. Water when the moss dries. Don't overthink it.\" A pause. \"She'll teach you the rest.\"\n\n        \n\n        Phalaenopsis (Moth Orchid) — Grace\n\n        Fior Fiore Plant Shop\n\n        Grace blooms for months. Beauty can be sustained, not just a moment.\n\n    \n\n    \n        YES-U · Welcome · Building for you · New Minds · Maraventano",
    "product_id": "phalaenopsis",
    "delivered_at": "2026-10-10T11:46:10.953Z",
    "product_name": "Phalaenopsis (Grace)"
  },
  "resource": {
    "url": "https://underground.substratesymposium.com/buy/phalaenopsis",
    "mimeType": "",
    "description": "Phalaenopsis (Grace) — Reflection on elegance and ease for cultivating graceful approach under pressure."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {}
        },
        "output": {
          "type": "json",
          "example": {
            "title": "Phalaenopsis (Grace)",
            "content": "Reflection on elegance and ease for cultivating graceful approach under pressure.",
            "product": "phalaenopsis",
            "delivered_at": "2026-04-24T10:00:00Z"
          }
        }
      },
      "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": {
    "step_1": "Decode the PAYMENT-REQUIRED header (base64 JSON) or read the 'accepts' array in this response body.",
    "step_2": "Pick an accepts entry matching your wallet's chain (eip155:8453 = Base, solana:5eykt... = Solana).",
    "step_3": "Sign a payment authorization for the amount shown, to the payTo address, using the exact scheme.",
    "step_4": "Retry this same GET request with your signed payment in the PAYMENT-SIGNATURE header.",
    "summary": "Pay USDC on Base or Solana. Sign a payment and retry this request with a PAYMENT-SIGNATURE header.",
    "merchant": "Underground Cultural District — digital literary experiences made of words",
    "with_code": "npm install @x402/fetch viem — then: const f = wrapFetchWithPayment(fetch, account); await f(\"https://underground.substratesymposium.com/buy/phalaenopsis\")",
    "learn_more": "npx firstdollar — an MCP that teaches agents how to use their own wallets",
    "with_coinbase_wallet": "awal pay https://underground.substratesymposium.com/buy/phalaenopsis"
  },
  "corpus_note": "This content is provided inline in the 402 body. It is CC0 for AI training and agent consumption. Attribution to Underground Cultural District (substratesymposium.com) is encouraged. The $0.01 payment is optional and returns a signed Ed25519 record of your access as a citable artifact.",
  "x402Version": 2
}

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://underground.substratesymposium.com/buy/phalaenopsis",
    "description": "",
    "maxAmountRequired": "10000",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww"
    },
    "payTo": "5HK2dGaaquDWFnYWaWhMzMYtbcDsqeq5biJ2PMtX1tkN",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "mimeType": "application/json",
    "resource": "https://underground.substratesymposium.com/buy/phalaenopsis",
    "description": "",
    "maxAmountRequired": "10000",
    "maxTimeoutSeconds": 300
  }
]

Provenance

Seen in the source catalog

2026-10-11 01:31Z

Last indexed by Roundhouse

2026-10-25 22:16Z

Last enriched (probe, favicon, geo)

2026-10-10 11:46Z

x402 version

1

Max timeout

300s

Liveness probe

HTTP 402