Deterministic, 10-K-cited cost-of-capital builds — CAPM cost of equity, tranche-level cost

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x73AcE32013985f715B5e00E5A341259cCE17D220",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "250000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {},
        "type": "http"
      },
      "output": {
        "example": {
          "capital_structure": {
            "D_V": 0,
            "D_m": 0,
            "E_V": 0,
            "E_m": 0,
            "P_V": 0,
            "P_m": 0
          },
          "coverage_pct": 0,
          "fye_date": "2025-09-27",
          "inputs": {
            "beta": 0,
            "beta_basis": "fye_computed",
            "erp": 0,
            "fye_price": 0,
            "kd_method": "weighted_coupon",
            "kd_pretax": 0,
            "rf": 0,
            "shares_m": 0,
            "tax": 0,
            "total_debt_m": 0
          },
          "notes": "",
          "results": {
            "kd_after_tax": 0,
            "ke": 0,
            "kp": 0,
            "wacc": 0
          },
          "servable": true,
          "ticker": "AAPL",
          "tranches": [
            {
              "basis": "<how the rate was resolved>",
              "coupon": 0,
              "floating": false,
              "name": "<tranche>",
              "principal": 0
            }
          ]
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "properties": {},
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

curl "https://alpha402x.com/wacc-build/AAPL/fye-2025-09-27"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://alpha402x.com/wacc-build/AAPL/fye-2025-09-27");
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://alpha402x.com/wacc-build/AAPL/fye-2025-09-27")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header