realcite-citation · Verify Citation

import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";

const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPay = wrapFetchWithPayment(fetch, account);

const res = await fetchWithPay("https://goodsong.dev/verify/citation", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "doi": "10.1126/science.1260419",
    "title": "Tissue-based map of the human proteome"
  }),
});
const data = await res.json();

curl -X POST \
  "https://goodsong.dev/verify/citation" \
  -H "Content-Type: application/json" \
  -d '{"doi":"10.1126/science.1260419","title":"Tissue-based map of the human proteome"}' \
  -H "X-PAYMENT: <signed x402 payment>"

{
  "canonical": {
    "authors": [
      "Mathias Uhlén",
      "Linn Fagerberg"
    ],
    "doi": "10.1126/science.1260419",
    "journal": "Science",
    "title": "Tissue-based map of the human proteome",
    "year": 2015,
    "year_candidates": [
      2015
    ]
  },
  "checks": {
    "authors_match": true,
    "exists": true,
    "journal_match": null,
    "retracted": false,
    "title_match": true,
    "year_match": true
  },
  "cost": {
    "amount": "0.005",
    "currency": "USDC"
  },
  "evidence": [
    {
      "retrieved_at": "2026-08-30T12:00:00Z",
      "source": "crossref",
      "url": "https://api.crossref.org/works/10.1126/science.1260419"
    }
  ],
  "latency_ms": 312,
  "verdict": "confirmed"
}