Micro Unit Uncertainty Conversion

{
  "amountBaseUnits": "8000",
  "boundaries": [
    "Public or synthetic inputs only. Caller labels are declarations,…"
  ],
  "inputDigest": "sha256:b3a587fdac867bb3cf6caab696c9ddbaf2c5c40eb06eb44e5ff8d1611…",
  "offerId": "unit-uncertainty-conversion",
  "receiptDigest": "sha256:c88f2b8cf15104628a2ef7c0558ada26dd9af2a8ba550210e03d932c0…",
  "result": {
    "from": "degF",
    "offset": {
      "denominator": "9",
      "numerator": "-160"
    },
    "physicalValidityVerified": false,
    "quantity": "absolute",
    "scale": {
      "denominator": "9",
      "numerator": "5"
    },
    "standardUncertainty": {
      "denominator": "1",
      "numerator": "1"
    },
    "to": "degC",
    "value": {
      "denominator": "1",
      "numerator": "0"
    }
  },
  "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/unit-uncertainty-conversion' \
  -H 'content-type: application/json' \
  --data-raw '{"dataClass":"synthetic","from":"degF","quantity":"absolute","standardUncertainty":"1.8","to":"degC","value":"32"}'

# 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/unit-uncertainty-conversion' \
  -H 'content-type: application/json' \
  --data-raw '{"dataClass":"synthetic","from":"degF","quantity":"absolute","standardUncertainty":"1.8","to":"degC","value":"32"}' \
  | 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 $0.008 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.008" });
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 $0.008 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fmicro%2Funit-uncertainty-conversion&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/micro/unit-uncertainty-conversion", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "dataClass": "synthetic",
    "from": "degF",
    "quantity": "absolute",
    "standardUncertainty": "1.8",
    "to": "degC",
    "value": "32"
  }),
});
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 $0.008 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.008"})
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/unit-uncertainty-conversion",
        json={
            "dataClass": "synthetic",
            "from": "degF",
            "quantity": "absolute",
            "standardUncertainty": "1.8",
            "to": "degC",
            "value": "32",
        },
    )
    print(res.status_code, res.text)