ToolVet
80trust / 100

Distance

by SiteCheck in Weather & location

x402 APIPassing, checked 1 h ago

The great-circle distance between two points in km and miles, the initial bearing and the midpoint. Each point is a lat,lon pair or a place name (geocoded with OpenStreetMap data, ODbL). Straight-line distance only, not a route.

GET
https://api.sitecheck-api.workers.dev/api/distance
Price
$0.001
per call in USDC
Uptime
100%
last 30 days
Response time
51 ms
712 ms slowest 5%
Last check
Passed
1 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed

How to call it

GET https://api.sitecheck-api.workers.dev/api/distance

Each call costs $0.001 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.

GET https://api.sitecheck-api.workers.dev/api/distance?from=Berlin&to=Istanbul

Parameters

ParameterTypeRequiredDescription
fromstringYeslat,lon or a place name
tostringYeslat,lon or a place name

Example response

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

{
  "checkedAt": "2026-10-14T07:00:47.494Z",
  "distanceKm": 1738.21,
  "distanceMiles": 1080.07,
  "from": {
    "label": "Berlin, Deutschland",
    "lat": 52.5173885,
    "lon": 13.3951309
  },
  "initialBearingDeg": 131.2,
  "midpoint": {
    "lat": 47.02386,
    "lon": 22.02567
  },
  "source": "haversine on a 6371 km sphere; place names from OpenStreetMap (Nominatim, ODbL)",
  "to": {
    "label": "İstanbul, Fatih, İstanbul, Marmara Bölgesi, 34122, Türkiye",
    "lat": 41.006381,
    "lon": 28.9758715
  }
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.001.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.sitecheck-api.workers.dev/api/distance?from=Berlin&to=Istanbul'

# 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://api.sitecheck-api.workers.dev/api/distance?from=Berlin&to=Istanbul' \
  | 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 $0.001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.001" });
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 $0.001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.sitecheck-api.workers.dev%2Fapi%2Fdistance
const res = await pay("https://api.sitecheck-api.workers.dev/api/distance?from=Berlin&to=Istanbul");
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 $0.001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.001"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://api.sitecheck-api.workers.dev/api/distance?from=Berlin&to=Istanbul")
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

WhenResultHTTPTimePrice
1 h agoPassed40265 ms$0.001
6 h agoPassed402712 ms$0.001
10 h agoPassed40259 ms$0.001
14 h agoPassed40250 ms$0.001
19 h agoPassed40248 ms$0.001
Show 1 older checks
23 h agoPassed40251 ms$0.001