Finance Analytics

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://hubvibe-io.com/work/finance/analytics' \
  -H 'content-type: application/json' \
  --data-raw '{"kelly":{"win_loss_ratio":1.5,"win_probability":0.55},"option":{"rate":0.04,"strike":120,"time_to_expiry_years":0.5,"type":"call"},"prices":[100,101.5,99.8,102.2,103.9,103.1,105.4,104.2,106.8,108,107.1,109.5,111.2,110.4,112.9,114.3,113,115.8,117.1,116.2,118.6,120],"risk_free_rate":0.04,"windows":{"bollinger":10,"ema":[5],"rsi":14,"sma":[5,10]}}'

# 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://hubvibe-io.com/work/finance/analytics' \
  -H 'content-type: application/json' \
  --data-raw '{"kelly":{"win_loss_ratio":1.5,"win_probability":0.55},"option":{"rate":0.04,"strike":120,"time_to_expiry_years":0.5,"type":"call"},"prices":[100,101.5,99.8,102.2,103.9,103.1,105.4,104.2,106.8,108,107.1,109.5,111.2,110.4,112.9,114.3,113,115.8,117.1,116.2,118.6,120],"risk_free_rate":0.04,"windows":{"bollinger":10,"ema":[5],"rsi":14,"sma":[5,10]}}' \
  | 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 $0.5 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.5" });
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 $0.5 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fhubvibe-io.com%2Fwork%2Ffinance%2Fanalytics&method=POST
const res = await pay("https://hubvibe-io.com/work/finance/analytics", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "kelly": {
      "win_loss_ratio": 1.5,
      "win_probability": 0.55
    },
    "option": {
      "rate": 0.04,
      "strike": 120,
      "time_to_expiry_years": 0.5,
      "type": "call"
    },
    "prices": [
      100,
      101.5,
      99.8,
      102.2,
      103.9,
      103.1,
      105.4,
      104.2,
      106.8,
      108,
      107.1,
      109.5,
      111.2,
      110.4,
      112.9,
      114.3,
      113,
      115.8,
      117.1,
      116.2,
      118.6,
      120
    ],
    "risk_free_rate": 0.04,
    "windows": {
      "bollinger": 10,
      "ema": [
        5
      ],
      "rsi": 14,
      "sma": [
        5,
        10
      ]
    }
  }),
});
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 $0.5 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.5"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://hubvibe-io.com/work/finance/analytics",
        json={
            "kelly": {
                "win_loss_ratio": 1.5,
                "win_probability": 0.55,
            },
            "option": {
                "rate": 0.04,
                "strike": 120,
                "time_to_expiry_years": 0.5,
                "type": "call",
            },
            "prices": [
                100,
                101.5,
                99.8,
                102.2,
                103.9,
                103.1,
                105.4,
                104.2,
                106.8,
                108,
                107.1,
                109.5,
                111.2,
                110.4,
                112.9,
                114.3,
                113,
                115.8,
                117.1,
                116.2,
                118.6,
                120,
            ],
            "risk_free_rate": 0.04,
            "windows": {
                "bollinger": 10,
                "ema": [
                    5,
                ],
                "rsi": 14,
                "sma": [
                    5,
                    10,
                ],
            },
        },
    )
    print(res.status_code, res.text)