Pubmed

{
  "articles": [
    {
      "authors": [
        "Mu SL",
        "Li X",
        "Wan YG"
      ],
      "date": "2026 Sep",
      "doi": "10.19540/j.cnki.cjcmm.20260603.701",
      "journal": "Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica",
      "link": "https://pubmed.ncbi.nlm.nih.gov/42869821/",
      "pmid": "42869821",
      "title": "[Effects and mechanisms of Shenqi Jiangtang Granules in improving sarcopenia in type 2 diabetes mellitus through multiple targets by regulating glucose and lipid metabolism disorder and mitophagy in skeletal muscle]."
    },
    {
      "authors": [
        "Puri R",
        "Mehta V",
        "Sahoo PK"
      ],
      "date": "2026 Sep 22",
      "doi": "10.1016/j.jacl.2026.09.010",
      "journal": "Journal of clinical lipidology",
      "link": "https://pubmed.ncbi.nlm.nih.gov/42869707/",
      "pmid": "42869707",
      "title": "Need for population-specific lipid guidelines for South Asians: Focus on the Indian population and its distinct cardiometabolic risk profile."
    }
  ],
  "attribution": "PubMed (NCBI)",
  "checkedAt": "2026-10-14T07:00:32.908Z",
  "disclaimer": "Information only, not medical advice.",
  "query": {
    "from": 2025,
    "q": "insulin"
  },
  "source": "https://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi + esummary.fcgi",
  "total": 35738
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.sitecheck-api.workers.dev/api/pubmed?from=2025&limit=2&q=insulin'

# 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://api.sitecheck-api.workers.dev/api/pubmed?from=2025&limit=2&q=insulin' \
  | 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 $0.001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.001" });
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 $0.001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.sitecheck-api.workers.dev%2Fapi%2Fpubmed
const res = await pay("https://api.sitecheck-api.workers.dev/api/pubmed?from=2025&limit=2&q=insulin");
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 $0.001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.001"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://api.sitecheck-api.workers.dev/api/pubmed?from=2025&limit=2&q=insulin")
    print(res.status_code, res.text)