Health Drug Shortages

{
  "cached": false,
  "data": {
    "drugs": [
      {
        "availability": {
          "Limited": 2,
          "Unavailable": 2
        },
        "companies": [
          "Baxter Healthcare Corporation"
        ],
        "drug": "Amino Acid Injection",
        "firstPosted": "2020-12-08",
        "lastUpdated": "2026-09-30",
        "packages": 4,
        "recoveryNotes": [
          "Estimated recovery: December 2026"
        ]
      }
    ],
    "drugsFound": 1,
    "packagesFound": 4,
    "query": "amino acid injection",
    "status": "current"
  }
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://www.x402pulse.dev/v1/health/drug-shortages?drug=amoxicillin'

# 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://www.x402pulse.dev/v1/health/drug-shortages?drug=amoxicillin' \
  | 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 $0.0175 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.0175" });
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 $0.0175 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.x402pulse.dev%2Fv1%2Fhealth%2Fdrug-shortages
const res = await pay("https://www.x402pulse.dev/v1/health/drug-shortages?drug=amoxicillin");
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 $0.0175 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.0175"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://www.x402pulse.dev/v1/health/drug-shortages?drug=amoxicillin")
    print(res.status_code, res.text)