Industrial Acq Underwrite

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://financial-analyst.ai/industrial-acq/underwrite' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"8400 NW Industrial Blvd, Kansas City, MO","exit_cap_rate":0.06,"hold_years":7,"ltv":0.65,"purchase_price":18500000,"tenants":[{"annual_rent_bump":0.025,"label":"Tenant A","lease_term_years":7,"lease_type":"nnn","rent_per_sf":6.5,"rentable_sf":150000}],"total_sf":250000}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://financial-analyst.ai/industrial-acq/underwrite' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"8400 NW Industrial Blvd, Kansas City, MO","exit_cap_rate":0.06,"hold_years":7,"ltv":0.65,"purchase_price":18500000,"tenants":[{"annual_rent_bump":0.025,"label":"Tenant A","lease_term_years":7,"lease_type":"nnn","rent_per_sf":6.5,"rentable_sf":150000}],"total_sf":250000}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $2 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$2" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $2 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ffinancial-analyst.ai%2Findustrial-acq%2Funderwrite&method=POST
const res = await pay("https://financial-analyst.ai/industrial-acq/underwrite", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "address": "8400 NW Industrial Blvd, Kansas City, MO",
    "exit_cap_rate": 0.06,
    "hold_years": 7,
    "ltv": 0.65,
    "purchase_price": 18500000,
    "tenants": [
      {
        "annual_rent_bump": 0.025,
        "label": "Tenant A",
        "lease_term_years": 7,
        "lease_type": "nnn",
        "rent_per_sf": 6.5,
        "rentable_sf": 150000
      }
    ],
    "total_sf": 250000
  }),
});
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $2 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$2"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://financial-analyst.ai/industrial-acq/underwrite",
        json={
            "address": "8400 NW Industrial Blvd, Kansas City, MO",
            "exit_cap_rate": 0.06,
            "hold_years": 7,
            "ltv": 0.65,
            "purchase_price": 18500000,
            "tenants": [
                {
                    "annual_rent_bump": 0.025,
                    "label": "Tenant A",
                    "lease_term_years": 7,
                    "lease_type": "nnn",
                    "rent_per_sf": 6.5,
                    "rentable_sf": 150000,
                },
            ],
            "total_sf": 250000,
        },
    )
    print(res.status_code, res.text)