ToolVet
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Atmospheric Co2

by Vextorium in Other

x402 APIFailing, checked 3 h ago

Atmospheric CO2 concentration measured at Mauna Loa (NOAA): latest monthly ppm, yearly change, comparison with 10 years ago and with 1958, and the recent series.

POST https://api.vextorium.com/v1/atmospheric-co2

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 "0.002" is not in atomic token units
Next check
any minute now

How to call it

POST https://api.vextorium.com/v1/atmospheric-co2

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/atmospheric-co2
content-type: application/json

{
  "months": 3
}

Parameters

ParameterTypeRequiredDescription
monthsintegerNo

Example response

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

{
  "10_years_ago_ppm": 402.45,
  "annual_change_ppm": 2.07,
  "first_record": {
    "period": "1958-03",
    "ppm": 315.71
  },
  "last": {
    "period": "2026-08",
    "ppm": 427.55,
    "seasonally_adjusted_ppm": 429.51
  },
  "series": [
    {
      "period": "2026-06",
      "ppm": 431.43
    },
    {
      "period": "2026-07",
      "ppm": 429.13
    }
  ],
  "source": "NOAA Global Monitoring Laboratory, Mauna Loa (public domain)"
}

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/atmospheric-co2' \
  -H 'content-type: application/json' \
  --data-raw '{"months":3}'

# 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/atmospheric-co2' \
  -H 'content-type: application/json' \
  --data-raw '{"months":3}' \
  | 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%2Fatmospheric-co2&method=POST
const res = await pay("https://api.vextorium.com/v1/atmospheric-co2", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "months": 3
  }),
});
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/atmospheric-co2",
        json={
            "months": 3,
        },
    )
    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 "0.002" is not in atomic token units402110 ms$0.002
8 h agoAmount "0.002" is not in atomic token units40294 ms$0.002
12 h agoAmount "0.002" is not in atomic token units40279 ms$0.002
16 h agoAmount "0.002" is not in atomic token units402234 ms$0.002
21 h agoAmount "0.002" is not in atomic token units40289 ms$0.002
25 h agoAmount "0.002" is not in atomic token units402232 ms$0.002
29 h agoAmount "0.002" is not in atomic token units40285 ms$0.002
33 h agoAmount "0.002" is not in atomic token units40277 ms$0.002
37 h agoAmount "0.002" is not in atomic token units40275 ms$0.002
41 h agoAmount "0.002" is not in atomic token units40279 ms$0.002
45 h agoAmount "0.002" is not in atomic token units40278 ms$0.002
2 days agoAmount "0.002" is not in atomic token units40293 ms$0.002
2 days agoAmount "0.002" is not in atomic token units40286 ms$0.002
2 days agoAmount "0.002" is not in atomic token units40296 ms$0.002
3 days agoAmount "0.002" is not in atomic token units40278 ms$0.002