Wiki Summary

{
  "asOf": "2026-10-08T16:30:00.000Z",
  "attribution": "From Wikipedia, the free encyclopedia — https://en.wikipedia.org/wiki/Riyadh",
  "coordinates": {
    "lat": 24.63333333,
    "lon": 46.71666667
  },
  "description": "Capital and largest city of Saudi Arabia",
  "extract": "Riyadh is the capital and largest city of Saudi Arabia. It is also the capital of the Riyadh Province and the centre of the Riyadh Governorate. Located on the eastern bank of Wadi Hanifa, the current form of the metropolis largely emerged in the 1950s as an expansion of the 18th-century walled town, following the dismantling of its defensive fortifications.",
  "lang": "en",
  "lastModified": "2026-10-04T19:10:02Z",
  "license": "CC BY-SA 4.0",
  "matchedBy": "exact title",
  "matchedTitle": null,
  "note": "The text is Wikipedia contributors', under CC BY-SA 4.0: keep the attribution and link beside any reuse.",
  "otherMatches": [
    "Riyadh Metro",
    "Riyadh Air",
    "Riyadh International Book Fair",
    "Riyadh Season"
  ],
  "query": "Riyadh",
  "source": "Wikipedia (en.wikipedia.org) — Wikimedia REST API: title/full-text search + page summary",
  "thumbnail": "https://thumb.wikimedia.org/wikipedia/commons/thumb/2/20/Riyadh_Skyline.jpg/330px-Riyadh_Skyline.jpg",
  "title": "Riyadh",
  "type": "standard",
  "url": "https://en.wikipedia.org/wiki/Riyadh",
  "wikidataId": "Q3692"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://fiatdock.com/v1/wiki/summary' \
  -H 'content-type: application/json' \
  --data-raw '{"lang":"en","query":"Riyadh"}'

# 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://fiatdock.com/v1/wiki/summary' \
  -H 'content-type: application/json' \
  --data-raw '{"lang":"en","query":"Riyadh"}' \
  | 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 $0.0018 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.0018" });
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 $0.0018 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ffiatdock.com%2Fv1%2Fwiki%2Fsummary&method=POST
const res = await pay("https://fiatdock.com/v1/wiki/summary", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "lang": "en",
    "query": "Riyadh"
  }),
});
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 $0.0018 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.0018"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://fiatdock.com/v1/wiki/summary",
        json={
            "lang": "en",
            "query": "Riyadh",
        },
    )
    print(res.status_code, res.text)