ToolVet
16trust / 100

Doi Info

by Vextorium in Other

x402 APIFailing, checked 2 h ago

Metadata of a publication by DOI (Crossref): title, authors, journal or publisher, year, type, citation count, references, license, link and an APA-formatted citation.

POST https://api.vextorium.com/v1/doi-info

Last 30 days

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Status and outage history · Atom feed

Uptime
0.0%
Response time
- typical, - slowest 5%
Last check
2 h ago: Amount "0.002" is not in atomic token units
Next check
any minute now

How to call it

POST https://api.vextorium.com/v1/doi-info

Each call costs $0.002 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://api.vextorium.com/v1/doi-info
content-type: application/json

{
  "doi": "10.1038/nature14539"
}

Parameters

ParameterTypeRequiredDescription
doistringYes

Example response

The provider's example. We can't check it without paying.

{
  "apa_citation": "LeCun, Y., Bengio, Y., Hinton, G. (2015). Deep learning. Nature, 521(7553), 436-444. https://doi.org/10.1038/nature14539",
  "authors": [
    "Yann LeCun",
    "Yoshua Bengio"
  ],
  "citations": 77858,
  "doi": "10.1038/nature14539",
  "editorial": "Springer Science and Business Media LLC",
  "journal": "Nature",
  "license": [
    "https://www.springer.com/tdm",
    "https://www.springer.com/tdm"
  ],
  "link": "https://doi.org/10.1038/nature14539",
  "number": "7553",
  "pages": "436-444",
  "references": 103,
  "source": "Crossref (metadatos)",
  "title": "Deep learning",
  "type": "journal-article",
  "volume": "521",
  "year": 2015
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.002.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.vextorium.com/v1/doi-info' \
  -H 'content-type: application/json' \
  --data-raw '{"doi":"10.1038/nature14539"}'

# 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 - -X POST 'https://api.vextorium.com/v1/doi-info' \
  -H 'content-type: application/json' \
  --data-raw '{"doi":"10.1038/nature14539"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// 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 $0.002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.002" });
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 $0.002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.vextorium.com%2Fv1%2Fdoi-info&method=POST
const res = await pay("https://api.vextorium.com/v1/doi-info", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "doi": "10.1038/nature14539"
  }),
});
console.log(res.status, await res.text());
Python: pay and call
# 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 $0.002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.002"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://api.vextorium.com/v1/doi-info",
        json={
            "doi": "10.1038/nature14539",
        },
    )
    print(res.status_code, res.text)

Security scan

  • No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
2 h agoAmount "0.002" is not in atomic token units402232 ms$0.002
7 h agoAmount "0.002" is not in atomic token units402126 ms$0.002
11 h agoAmount "0.002" is not in atomic token units40279 ms$0.002
16 h agoAmount "0.002" is not in atomic token units40276 ms$0.002
20 h agoAmount "0.002" is not in atomic token units40281 ms$0.002
24 h agoAmount "0.002" is not in atomic token units40282 ms$0.002
29 h agoAmount "0.002" is not in atomic token units40282 ms$0.002
33 h agoAmount "0.002" is not in atomic token units402271 ms$0.002
37 h agoAmount "0.002" is not in atomic token units40291 ms$0.002
41 h agoAmount "0.002" is not in atomic token units40283 ms$0.002
45 h agoAmount "0.002" is not in atomic token units40295 ms$0.002
2 days agoAmount "0.002" is not in atomic token units402151 ms$0.002
2 days agoAmount "0.002" is not in atomic token units402239 ms$0.002
2 days agoAmount "0.002" is not in atomic token units402153 ms$0.002
3 days agoAmount "0.002" is not in atomic token units40277 ms$0.002