Health Who

{
  "change_vs_5y_earlier": -0.1,
  "country": "USA",
  "history": [
    {
      "value": 78.5,
      "year": 2023
    },
    {
      "value": 77.5,
      "year": 2022
    },
    {
      "value": 76.4,
      "year": 2021
    },
    {
      "value": 76.9,
      "year": 2020
    },
    {
      "value": 78.8,
      "year": 2019
    },
    {
      "value": 78.6,
      "year": 2018
    }
  ],
  "indicator": "WHOSIS_000001",
  "latest": [
    {
      "breakdown": "both",
      "display": "78.5 [78.4-78.6]",
      "high": 78.6,
      "low": 78.4,
      "value": 78.5
    },
    {
      "breakdown": "female",
      "display": "80.9 [80.8-80.9]",
      "high": 80.9,
      "low": 80.8,
      "value": 80.9
    },
    {
      "breakdown": "male",
      "display": "76.2 [76.2-76.3]",
      "high": 76.3,
      "low": 76.2,
      "value": 76.2
    }
  ],
  "latest_year": 2023,
  "name": "Life expectancy at birth (years)",
  "source": "WHO Global Health Observatory"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://saylorinnovations.com/api/health/who?country=USA&indicator=WHOSIS_000001'

# 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 - 'https://saylorinnovations.com/api/health/who?country=USA&indicator=WHOSIS_000001' \
  | 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 $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
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 $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fsaylorinnovations.com%2Fapi%2Fhealth%2Fwho
const res = await pay("https://saylorinnovations.com/api/health/who?country=USA&indicator=WHOSIS_000001");
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 $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://saylorinnovations.com/api/health/who?country=USA&indicator=WHOSIS_000001")
    print(res.status_code, res.text)