ToolVet
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Us Grants

by Vextorium in Search & web

x402 APIFailing, checked 3 h ago

US federal grant opportunities from Grants.gov: title, number, agency, open and close dates, status and link; search by keyword (AI, energy, health...) and agency (NSF, NIH, DOE...), open or forecasted.

POST https://api.vextorium.com/v1/us-grants

Last 30 days

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Status and outage history · Atom feed

Uptime
0.0%
Response time
- typical, - slowest 5%
Last check
3 h ago: Amount "0.003" is not in atomic token units
Next check
any minute now

How to call it

POST https://api.vextorium.com/v1/us-grants

Each call costs $0.003 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/us-grants
content-type: application/json

{
  "limit": 2,
  "search": "artificial intelligence"
}

Parameters

ParameterTypeRequiredDescription
agencystringNo
limitintegerNo
searchstringNo
statusstringNo One of: open, upcoming, all.

Example response

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

Example response, 29 lines
{
  "agency": null,
  "calls": [
    {
      "agency": "National Institutes of Health",
      "agency_code": "HHS-NIH11",
      "close": "05/28/2027",
      "link": "https://www.grants.gov/search-results-detail/361050",
      "number": "RFA-AI-28-031",
      "open": "10/02/2026",
      "status": "posted",
      "title": "Centers for Structural Biology of HIV and Other Infectious Diseases (U54 Clinical Trial Not Allowed)"
    },
    {
      "agency": "U.S. National Science Foundation",
      "agency_code": "NSF",
      "close": "",
      "link": "https://www.grants.gov/search-results-detail/364017",
      "number": "25-546",
      "open": "10/01/2026",
      "status": "posted",
      "title": "Foundations for Operating the National Artificial Intelligence Research Resource: the NAIRR Operations Center (NAIRR-OC)"
    }
  ],
  "search": "artificial intelligence",
  "source": "Grants.gov (US Government, public domain)",
  "status": "open",
  "total": 150
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.003.

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/us-grants' \
  -H 'content-type: application/json' \
  --data-raw '{"limit":2,"search":"artificial intelligence"}'

# 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/us-grants' \
  -H 'content-type: application/json' \
  --data-raw '{"limit":2,"search":"artificial intelligence"}' \
  | 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 $0.003 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.003" });
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 $0.003 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.vextorium.com%2Fv1%2Fus-grants&method=POST
const res = await pay("https://api.vextorium.com/v1/us-grants", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "limit": 2,
    "search": "artificial intelligence"
  }),
});
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 $0.003 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.003"})
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/us-grants",
        json={
            "limit": 2,
            "search": "artificial intelligence",
        },
    )
    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
3 h agoAmount "0.003" is not in atomic token units402123 ms$0.003
8 h agoAmount "0.003" is not in atomic token units40284 ms$0.003
12 h agoAmount "0.003" is not in atomic token units40281 ms$0.003
17 h agoAmount "0.003" is not in atomic token units40279 ms$0.003
21 h agoAmount "0.003" is not in atomic token units402108 ms$0.003
25 h agoAmount "0.003" is not in atomic token units40289 ms$0.003
29 h agoAmount "0.003" is not in atomic token units40288 ms$0.003
33 h agoAmount "0.003" is not in atomic token units40283 ms$0.003
37 h agoAmount "0.003" is not in atomic token units40278 ms$0.003
41 h agoAmount "0.003" is not in atomic token units40274 ms$0.003
45 h agoAmount "0.003" is not in atomic token units402104 ms$0.003
2 days agoAmount "0.003" is not in atomic token units40278 ms$0.003
2 days agoAmount "0.003" is not in atomic token units402232 ms$0.003
2 days agoAmount "0.003" is not in atomic token units40282 ms$0.003
3 days agoAmount "0.003" is not in atomic token units40284 ms$0.003