Roundhouse

nojunk-qr.mick8511.workers.dev

QR Code Generator qr: Encode one text as a QR Code (ISO/IEC 18004, versions 1-40, ECC L/M/Q/H) and return it as SVG, PNG or a JSON matrix.

OtherLiveeip155:8453Exactvia cdp
https://nojunk-qr.mick8511.workers.dev/qr
Calls · 30d
3
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 8 snapshots so far.
$0.57
Verified settled volume
132 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0010
Listed price
As published in the catalog. Always read the live 402 before paying.
3
Calls · 30d
Upstream's own call count for this endpoint, not ours.
3
Unique payers · 30d
Last called 2026-10-24 01:55Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x6f762720b8515b7091e6aa69e8361f7b9909233f

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Live 402 challenge

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

{
  "error": "PAYMENT-SIGNATURE header is required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x6f762720b8515b7091e6aa69e8361f7b9909233f",
      "amount": "1000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://nojunk-qr.mick8511.workers.dev/qr",
    "mimeType": "image/svg+xml",
    "description": "NoJunk QR qr: Encode one text as a QR Code (ISO/IEC 18004, versions 1-40, ECC L/M/Q/H) and return it as SVG, PNG or a JSON matrix."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "ecc": "M",
            "dark": "#000000",
            "size": 256,
            "text": "https://nojunkcrypto.com/?ref=agent",
            "light": "#FFFFFF",
            "format": "json",
            "margin": 4
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "ecc": "M",
            "svg": "<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"256\" height=\"256\" viewBox=\"0 0 37 37\" shape-rendering=\"crispEdges\" role=\"img\"><rect width=\"37\" height=\"37\" fill=\"#FFFFFF\"/><path d=\"M4 4h7v1h-7zM13 4h1v1h-1zM15 4h1v1h-1zM18 4h1v1h-1zM21 4h3v1h-3zM26 4h7v1h-7zM4 5h1v1h-1zM10 5h1v1h-1zM16 5h1v1h-1zM20 5h1v1h-1zM22 5h1v1h-1zM24 5h1v1h-1zM26 5h1v1h-1zM32 5h1v1h-1zM4 6h1v1h-1zM6 6h3v1h-3zM10 6h1v1h-1zM13 6h3v1h-3zM18 6h2v1h-2zM21 6h1v1h-1zM23 6h1v1h-1zM26 6h1v1h-1zM28 6h3v1h-3zM32 6h1v1h-1zM4 7h1v1h-1zM6 7h3v1h-3zM10 7h1v1h-1zM14 7h4v1h-4zM22 7h2v1h-2zM26 7h1v1h-1zM28 7h3v1h-3zM32 7h1v1h-1zM4 8h1v1h-1zM6 8h3v1h-3zM10 8h1v1h-1zM13 8h1v1h-1zM16 8h1v1h-1zM21 8h2v1h-2zM26 8h1v1h-1zM28 8h3v1h-3zM32 8h1v1h-1zM4 9h1v1h-1zM10 9h1v1h-1zM12 9h1v1h-1zM16 9h1v1h-1zM19 9h1v1h-1zM22 9h3v1h-3zM26 9h1v1h-1zM32 9h1v1h-1zM4 10h7v1h-7zM12 10h1v1h-1zM14 10h1v1h-1zM16 10h1v1h-1zM18 10h1v1h-1zM20 10h1v1h-1zM22 10h1v1h-1zM24 10h1v1h-1zM26 10h7v1h-7zM14 11h4v1h-4zM19 11h1v1h-1zM21 11h4v1h-4zM4 12h1v1h-1zM7 12h1v1h-1zM9 12h2v1h-2zM12 12h1v1h-1zM14 12h1v1h-1zM16 12h1v1h-1zM18 12h1v1h-1zM22 12h2v1h-2zM25 12h1v1h-1zM27 12h1v1h-1zM4 13h1v1h-1zM6 13h3v1h-3zM11 13h1v1h-1zM15 13h1v1h-1zM17 13h1v1h-1zM20 13h1v1h-1zM25 13h2v1h-2zM29 13h1v1h-1zM32 13h1v1h-1zM6 14h1v1h-1zM9 14h3v1h-3zM17 14h2v1h-2zM21 14h1v1h-1zM23 14h1v1h-1zM25 14h7v1h-7zM4 15h3v1h-3zM9 15h1v1h-1zM11 15h2v1h-2zM14 15h2v1h-2zM17 15h1v1h-1zM20 15h1v1h-1zM22 15h1v1h-1zM25 15h3v1h-3zM30 15h2v1h-2zM4 16h3v1h-3zM10 16h1v1h-1zM13 16h3v1h-3zM18 16h10v1h-10zM29 16h1v1h-1zM31 16h2v1h-2zM4 17h1v1h-1zM7 17h2v1h-2zM11 17h1v1h-1zM14 17h1v1h-1zM16 17h3v1h-3zM22 17h4v1h-4zM5 18h2v1h-2zM9 18h2v1h-2zM15 18h1v1h-1zM17 18h2v1h-2zM27 18h1v1h-1zM29 18h4v1h-4zM7 19h1v1h-1zM11 19h3v1h-3zM16 19h1v1h-1zM19 19h6v1h-6zM26 19h4v1h-4zM31 19h1v1h-1zM8 20h1v1h-1zM10 20h1v1h-1zM14 20h4v1h-4zM21 20h1v1h-1zM23 20h1v1h-1zM25 20h1v1h-1zM31 20h1v1h-1zM7 21h2v1h-2zM11 21h3v1h-3zM16 21h3v1h-3zM20 21h1v1h-1zM22 21h1v1h-1zM25 21h3v1h-3zM29 21h1v1h-1zM32 21h1v1h-1zM4 22h1v1h-1zM6 22h2v1h-2zM9 22h2v1h-2zM16 22h1v1h-1zM18 22h1v1h-1zM21 22h2v1h-2zM24 22h1v1h-1zM26 22h2v1h-2zM31 22h2v1h-2zM6 23h2v1h-2zM11 23h2v1h-2zM15 23h1v1h-1zM18 23h1v1h-1zM21 23h1v1h-1zM28 23h1v1h-1zM31 23h2v1h-2zM4 24h1v1h-1zM7 24h1v1h-1zM10 24h2v1h-2zM13 24h2v1h-2zM20 24h1v1h-1zM24 24h5v1h-5zM30 24h1v1h-1zM12 25h1v1h-1zM14 25h2v1h-2zM18 25h1v1h-1zM20 25h2v1h-2zM24 25h1v1h-1zM28 25h1v1h-1zM30 25h3v1h-3zM4 26h7v1h-7zM15 26h2v1h-2zM20 26h1v1h-1zM24 26h1v1h-1zM26 26h1v1h-1zM28 26h1v1h-1zM31 26h1v1h-1zM4 27h1v1h-1zM10 27h1v1h-1zM12 27h1v1h-1zM15 27h1v1h-1zM18 27h2v1h-2zM22 27h1v1h-1zM24 27h1v1h-1zM28 27h3v1h-3zM32 27h1v1h-1zM4 28h1v1h-1zM6 28h3v1h-3zM10 28h1v1h-1zM13 28h3v1h-3zM20 28h2v1h-2zM24 28h5v1h-5zM32 28h1v1h-1zM4 29h1v1h-1zM6 29h3v1h-3zM10 29h1v1h-1zM12 29h1v1h-1zM14 29h2v1h-2zM21 29h1v1h-1zM23 29h1v1h-1zM26 29h6v1h-6zM4 30h1v1h-1zM6 30h3v1h-3zM10 30h1v1h-1zM13 30h3v1h-3zM24 30h2v1h-2zM28 30h3v1h-3zM32 30h1v1h-1zM4 31h1v1h-1zM10 31h1v1h-1zM15 31h1v1h-1zM18 31h4v1h-4zM24 31h2v1h-2zM27 31h2v1h-2zM31 31h1v1h-1zM4 32h7v1h-7zM12 32h1v1h-1zM14 32h1v1h-1zM16 32h1v1h-1zM19 32h4v1h-4zM24 32h1v1h-1zM26 32h2v1h-2zM29 32h1v1h-1zM31 32h1v1h-1z\" fill=\"#000000\"/></svg>",
            "mask": 7,
            "mode": "byte",
            "matrix": [
              "11111110010100100111001111111",
              "10000010000010001010101000001",
              "10111010011100110101001011101",
              "10111010001111000011001011101",
              "10111010010010000110001011101",
              "10000010100010010011101000001",
              "11111110101010101010101111111",
              "00000000001111010111100000000",
              "10010110101010100011010100000",
              "10111001000101001000011001001",
              "00100111000001100101011111110",
              "11100101101101001010011100110",
              "11100010011100111111111101011",
              "10011001001011100011110000000",
              "01100110000101100000000101111",
              "00010001110010011111101111010",
              "00001010001111000101010000010",
              "00011001110011101010011101001",
              "10110110000010100110101100011",
              "00110001100100100100000010011",
              "10010011011000001000111110100",
              "00000000101100101100100010111",
              "11111110000110001000101010010",
              "10000010100100110010100011101",
              "10111010011100001100111110001",
              "10111010101100000101001111110",
              "10111010011100000000110011101",
              "10000010000100111100110110010",
              "11111110101010011110101101010"
            ],
            "modules": 29,
            "version": 3
          }
        }
      },
      "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": [
                  "text"
                ],
                "properties": {
                  "ecc": {
                    "type": "string",
                    "description": "Optional: error correction level L (7%), M (15%, default), Q (25%) or H (30%); higher levels survive more damage but hold less text"
                  },
                  "dark": {
                    "type": "string",
                    "description": "Optional: hex color of the dark modules (default #000000)"
                  },
                  "size": {
                    "type": "integer",
                    "description": "Optional: output width/height in pixels, 128-2048 (default 512); SVG scales freely, PNG uses whole pixels per module centred in the image"
                  },
                  "text": {
                    "type": "string",
                    "description": "The content to encode (1-1500 characters, UTF-8): URL, plain text, WIFI:..., mailto:, tel:, vCard, payment URI..."
                  },
                  "light": {
                    "type": "string",
                    "description": "Optional: hex color of the background (default #FFFFFF)"
                  },
                  "format": {
                    "type": "string",
                    "description": "Optional: \"svg\" (default; body is the SVG document), \"png\" (body is PNG bytes) or \"json\" ({version, ecc, modules, matrix, svg})"
                  },
                  "margin": {
                    "type": "integer",
                    "description": "Optional: quiet zone in modules, 0-8 (default 4; the standard recommends 4)"
                  }
                }
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "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.

0.001USDC≈ $0.001 USD
on Base · exact scheme

Pay 0.001 USDC on Base to 0x6f76…9233f. The signed payment is good for 5 minutes.

Paid to
0x6f76…9233f
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
1000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x6f762720b8515b7091e6aa69e8361f7b9909233f",
    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "ecc": "M",
          "dark": "#000000",
          "size": 256,
          "text": "https://nojunkcrypto.com/?ref=agent",
          "light": "#FFFFFF",
          "format": "json",
          "margin": 4
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "ecc": "M",
          "svg": "<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"256\" height=\"256\" viewBox=\"0 0 37 37\" shape-rendering=\"crispEdges\" role=\"img\"><rect width=\"37\" height=\"37\" fill=\"#FFFFFF\"/><path d=\"M4 4h7v1h-7zM13 4h1v1h-1zM15 4h1v1h-1zM18 4h1v1h-1zM21 4h3v1h-3zM26 4h7v1h-7zM4 5h1v1h-1zM10 5h1v1h-1zM16 5h1v1h-1zM20 5h1v1h-1zM22 5h1v1h-1zM24 5h1v1h-1zM26 5h1v1h-1zM32 5h1v1h-1zM4 6h1v1h-1zM6 6h3v1h-3zM10 6h1v1h-1zM13 6h3v1h-3zM18 6h2v1h-2zM21 6h1v1h-1zM23 6h1v1h-1zM26 6h1v1h-1zM28 6h3v1h-3zM32 6h1v1h-1zM4 7h1v1h-1zM6 7h3v1h-3zM10 7h1v1h-1zM14 7h4v1h-4zM22 7h2v1h-2zM26 7h1v1h-1zM28 7h3v1h-3zM32 7h1v1h-1zM4 8h1v1h-1zM6 8h3v1h-3zM10 8h1v1h-1zM13 8h1v1h-1zM16 8h1v1h-1zM21 8h2v1h-2zM26 8h1v1h-1zM28 8h3v1h-3zM32 8h1v1h-1zM4 9h1v1h-1zM10 9h1v1h-1zM12 9h1v1h-1zM16 9h1v1h-1zM19 9h1v1h-1zM22 9h3v1h-3zM26 9h1v1h-1zM32 9h1v1h-1zM4 10h7v1h-7zM12 10h1v1h-1zM14 10h1v1h-1zM16 10h1v1h-1zM18 10h1v1h-1zM20 10h1v1h-1zM22 10h1v1h-1zM24 10h1v1h-1zM26 10h7v1h-7zM14 11h4v1h-4zM19 11h1v1h-1zM21 11h4v1h-4zM4 12h1v1h-1zM7 12h1v1h-1zM9 12h2v1h-2zM12 12h1v1h-1zM14 12h1v1h-1zM16 12h1v1h-1zM18 12h1v1h-1zM22 12h2v1h-2zM25 12h1v1h-1zM27 12h1v1h-1zM4 13h1v1h-1zM6 13h3v1h-3zM11 13h1v1h-1zM15 13h1v1h-1zM17 13h1v1h-1zM20 13h1v1h-1zM25 13h2v1h-2zM29 13h1v1h-1zM32 13h1v1h-1zM6 14h1v1h-1zM9 14h3v1h-3zM17 14h2v1h-2zM21 14h1v1h-1zM23 14h1v1h-1zM25 14h7v1h-7zM4 15h3v1h-3zM9 15h1v1h-1zM11 15h2v1h-2zM14 15h2v1h-2zM17 15h1v1h-1zM20 15h1v1h-1zM22 15h1v1h-1zM25 15h3v1h-3zM30 15h2v1h-2zM4 16h3v1h-3zM10 16h1v1h-1zM13 16h3v1h-3zM18 16h10v1h-10zM29 16h1v1h-1zM31 16h2v1h-2zM4 17h1v1h-1zM7 17h2v1h-2zM11 17h1v1h-1zM14 17h1v1h-1zM16 17h3v1h-3zM22 17h4v1h-4zM5 18h2v1h-2zM9 18h2v1h-2zM15 18h1v1h-1zM17 18h2v1h-2zM27 18h1v1h-1zM29 18h4v1h-4zM7 19h1v1h-1zM11 19h3v1h-3zM16 19h1v1h-1zM19 19h6v1h-6zM26 19h4v1h-4zM31 19h1v1h-1zM8 20h1v1h-1zM10 20h1v1h-1zM14 20h4v1h-4zM21 20h1v1h-1zM23 20h1v1h-1zM25 20h1v1h-1zM31 20h1v1h-1zM7 21h2v1h-2zM11 21h3v1h-3zM16 21h3v1h-3zM20 21h1v1h-1zM22 21h1v1h-1zM25 21h3v1h-3zM29 21h1v1h-1zM32 21h1v1h-1zM4 22h1v1h-1zM6 22h2v1h-2zM9 22h2v1h-2zM16 22h1v1h-1zM18 22h1v1h-1zM21 22h2v1h-2zM24 22h1v1h-1zM26 22h2v1h-2zM31 22h2v1h-2zM6 23h2v1h-2zM11 23h2v1h-2zM15 23h1v1h-1zM18 23h1v1h-1zM21 23h1v1h-1zM28 23h1v1h-1zM31 23h2v1h-2zM4 24h1v1h-1zM7 24h1v1h-1zM10 24h2v1h-2zM13 24h2v1h-2zM20 24h1v1h-1zM24 24h5v1h-5zM30 24h1v1h-1zM12 25h1v1h-1zM14 25h2v1h-2zM18 25h1v1h-1zM20 25h2v1h-2zM24 25h1v1h-1zM28 25h1v1h-1zM30 25h3v1h-3zM4 26h7v1h-7zM15 26h2v1h-2zM20 26h1v1h-1zM24 26h1v1h-1zM26 26h1v1h-1zM28 26h1v1h-1zM31 26h1v1h-1zM4 27h1v1h-1zM10 27h1v1h-1zM12 27h1v1h-1zM15 27h1v1h-1zM18 27h2v1h-2zM22 27h1v1h-1zM24 27h1v1h-1zM28 27h3v1h-3zM32 27h1v1h-1zM4 28h1v1h-1zM6 28h3v1h-3zM10 28h1v1h-1zM13 28h3v1h-3zM20 28h2v1h-2zM24 28h5v1h-5zM32 28h1v1h-1zM4 29h1v1h-1zM6 29h3v1h-3zM10 29h1v1h-1zM12 29h1v1h-1zM14 29h2v1h-2zM21 29h1v1h-1zM23 29h1v1h-1zM26 29h6v1h-6zM4 30h1v1h-1zM6 30h3v1h-3zM10 30h1v1h-1zM13 30h3v1h-3zM24 30h2v1h-2zM28 30h3v1h-3zM32 30h1v1h-1zM4 31h1v1h-1zM10 31h1v1h-1zM15 31h1v1h-1zM18 31h4v1h-4zM24 31h2v1h-2zM27 31h2v1h-2zM31 31h1v1h-1zM4 32h7v1h-7zM12 32h1v1h-1zM14 32h1v1h-1zM16 32h1v1h-1zM19 32h4v1h-4zM24 32h1v1h-1zM26 32h2v1h-2zM29 32h1v1h-1zM31 32h1v1h-1z\" fill=\"#000000\"/></svg>",
          "mask": 7,
          "mode": "byte",
          "matrix": [
            "11111110010100100111001111111",
            "10000010000010001010101000001",
            "10111010011100110101001011101",
            "10111010001111000011001011101",
            "10111010010010000110001011101",
            "10000010100010010011101000001",
            "11111110101010101010101111111",
            "00000000001111010111100000000",
            "10010110101010100011010100000",
            "10111001000101001000011001001",
            "00100111000001100101011111110",
            "11100101101101001010011100110",
            "11100010011100111111111101011",
            "10011001001011100011110000000",
            "01100110000101100000000101111",
            "00010001110010011111101111010",
            "00001010001111000101010000010",
            "00011001110011101010011101001",
            "10110110000010100110101100011",
            "00110001100100100100000010011",
            "10010011011000001000111110100",
            "00000000101100101100100010111",
            "11111110000110001000101010010",
            "10000010100100110010100011101",
            "10111010011100001100111110001",
            "10111010101100000101001111110",
            "10111010011100000000110011101",
            "10000010000100111100110110010",
            "11111110101010011110101101010"
          ],
          "modules": 29,
          "version": 3
        }
      }
    },
    "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": [
                "text"
              ],
              "properties": {
                "ecc": {
                  "type": "string",
                  "description": "Optional: error correction level L (7%), M (15%, default), Q (25%) or H (30%); higher levels survive more damage but hold less text"
                },
                "dark": {
                  "type": "string",
                  "description": "Optional: hex color of the dark modules (default #000000)"
                },
                "size": {
                  "type": "integer",
                  "description": "Optional: output width/height in pixels, 128-2048 (default 512); SVG scales freely, PNG uses whole pixels per module centred in the image"
                },
                "text": {
                  "type": "string",
                  "description": "The content to encode (1-1500 characters, UTF-8): URL, plain text, WIFI:..., mailto:, tel:, vCard, payment URI..."
                },
                "light": {
                  "type": "string",
                  "description": "Optional: hex color of the background (default #FFFFFF)"
                },
                "format": {
                  "type": "string",
                  "description": "Optional: \"svg\" (default; body is the SVG document), \"png\" (body is PNG bytes) or \"json\" ({version, ecc, modules, matrix, svg})"
                },
                "margin": {
                  "type": "integer",
                  "description": "Optional: quiet zone in modules, 0-8 (default 4; the standard recommends 4)"
                }
              }
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST",
                "PUT",
                "PATCH"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-10-24 01:55Z
Last indexed by Roundhouse
2026-10-26 22:50Z
Last enriched (probe, favicon, geo)
2026-10-18 18:15Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 402
Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 8 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service nojunk-qr.mick8511.workers.dev and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=nojunk-qr.mick8511.workers.dev'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://nojunk-qr.mick8511.workers.dev/qr, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.