Micro Bracketed Polynomial Root

{
  "amountBaseUnits": "9000",
  "boundaries": [
    "Public or synthetic inputs only. Caller labels are declarations,…"
  ],
  "inputDigest": "sha256:9c7a77d17f180516b1a50bfa14c2a07c341c7998bb5f9e0e27acb6134…",
  "offerId": "bracketed-polynomial-root",
  "receiptDigest": "sha256:59a1bfd270d4c21109a44d722b4ef5782ff3454c7dcb8634e317e4b30…",
  "result": {
    "bracket": {
      "lower": {
        "denominator": "524288",
        "numerator": "741455"
      },
      "upper": {
        "denominator": "1048576",
        "numerator": "1482911"
      }
    },
    "iterations": 20,
    "method": "rational-polynomial-bisection",
    "state": "tolerance-reached",
    "uniquenessEstablished": false
  },
  "version": "maha-microproducts/0.1"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://www.mahastrategies.com/api/v1/micro/bracketed-polynomial-root' \
  -H 'content-type: application/json' \
  --data-raw '{"coefficientsAscending":["-2","0","1"],"dataClass":"synthetic","lower":"1","maxIterations":32,"tolerance":"0.000001","upper":"2"}'

# 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://www.mahastrategies.com/api/v1/micro/bracketed-polynomial-root' \
  -H 'content-type: application/json' \
  --data-raw '{"coefficientsAscending":["-2","0","1"],"dataClass":"synthetic","lower":"1","maxIterations":32,"tolerance":"0.000001","upper":"2"}' \
  | 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 $0.009 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.009" });
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 $0.009 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fmicro%2Fbracketed-polynomial-root&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/micro/bracketed-polynomial-root", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "coefficientsAscending": [
      "-2",
      "0",
      "1"
    ],
    "dataClass": "synthetic",
    "lower": "1",
    "maxIterations": 32,
    "tolerance": "0.000001",
    "upper": "2"
  }),
});
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 $0.009 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.009"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://www.mahastrategies.com/api/v1/micro/bracketed-polynomial-root",
        json={
            "coefficientsAscending": [
                "-2",
                "0",
                "1",
            ],
            "dataClass": "synthetic",
            "lower": "1",
            "maxIterations": 32,
            "tolerance": "0.000001",
            "upper": "2",
        },
    )
    print(res.status_code, res.text)