Build a chord from a root note and quality (major, minor, dim, aug, maj7, min7, dom7, dim7

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "2000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "quality": "major",
          "root": "example"
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "body": {
              "additionalProperties": false,
              "properties": {
                "quality": {
                  "description": "Chord quality.",
                  "enum": [
                    "major",
                    "minor",
                    "dim",
                    "aug",
                    "maj7",
                    "min7",
                    "dom7",
                    "dim7",
                    "half-dim7",
                    "sus2",
                    "sus4",
                    "maj6",
                    "min6"
                  ],
                  "type": "string"
                },
                "root": {
                  "description": "Root note, e.g. \"C4\".",
                  "maxLength": 8,
                  "minLength": 1,
                  "type": "string"
                }
              },
              "required": [
                "root",
                "quality"
              ],
              "type": "object"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

curl "https://music.openverbs.com/v1/chord"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://music.openverbs.com/v1/chord");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

import httpx
res = httpx.get("https://music.openverbs.com/v1/chord")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header