API Acre

Search open Crossref bibliographic metadata by title, author, DOI fragment, or citation and return bounded normalized publication, author, citation, license, and update metadata without abstracts or full text.

Open endpoint ↗

Price per call: $0.008
Chain: Base
Method: POST
Paid calls · 30 days: 25

Call it from code

This API is run by its own provider and paid directly through x402. We list it so you can find it; we don't route or hold the payment.

import { x402Client, wrapFetchWithPayment } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";

const client = new x402Client();
registerExactEvmScheme(client, { signer: agentAccount });

const pay = wrapFetchWithPayment(fetch, client);
const res = await pay("https://apiacre.com/v1/research/crossref-work-search", { method: "POST" });
console.log(await res.json());

https://apiacre.com/v1/research/crossref-work-search