Papers

{
  "data": {
    "cached": false,
    "license": "CC0 (OpenAlex data is public domain)",
    "papers": [
      {
        "authors": [
          "Gabriele Corso",
          "Hannes Stark",
          "Stefanie Jegelka",
          "Tommi Jaakkola",
          "Regina Barzilay"
        ],
        "authors_total": 5,
        "cited_by": 452,
        "doi": "10.1038/s43586-024-00294-7",
        "open_access": {
          "is_oa": false,
          "url": null
        },
        "openalex_id": "https://openalex.org/W4392553889",
        "title": "Graph neural networks",
        "type": "review",
        "venue": "Nature Reviews Methods Primers",
        "year": 2024
      },
      {
        "authors": [
          "Franco Scarselli",
          "Marco Gori",
          "Ah Chung Tsoi",
          "Markus Hagenbuchner",
          "Gabriele Monfardini"
        ],
        "authors_total": 5,
        "cited_by": 9461,
        "doi": "10.1109/tnn.2008.2005605",
        "open_access": {
          "is_oa": true,
          "url": "https://figshare.com/articles/journal_contribution/The_graph_neural_network_model/27757629"
        },
        "openalex_id": "https://openalex.org/W2116341502",
        "title": "The Graph Neural Network Model",
        "type": "article",
        "venue": "IEEE Transactions on Neural Networks",
        "year": 2008
      }
    ],
    "query": "graph neural networks",
    "returned": 10,
    "source": "OpenAlex (openalex.org)",
    "total_matches": 959235,
    "year_from": null
  },
  "paid": true,
  "tool": "get_papers"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://x402.ochinimus.app/api/papers?q=graph+neural+networks'

# 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://x402.ochinimus.app/api/papers?q=graph+neural+networks' \
  | 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 $0.0075 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.0075" });
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 $0.0075 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fx402.ochinimus.app%2Fapi%2Fpapers
const res = await pay("https://x402.ochinimus.app/api/papers?q=graph+neural+networks");
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 $0.0075 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.0075"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://x402.ochinimus.app/api/papers?q=graph+neural+networks")
    print(res.status_code, res.text)