Data Worldbank Snapshot

{
  "data": {
    "availableMetricCount": 6,
    "country": {
      "iso2Code": "GB",
      "iso3Code": "GBR",
      "name": "United Kingdom",
      "region": "Europe & Central Asia"
    },
    "license": {
      "attribution": "World Bank, World Development Indicators.",
      "id": "CC-BY-4.0",
      "termsUrl": "https://data.worldbank.org/summary-terms-of-use",
      "url": "https://creativecommons.org/licenses/by/4.0/"
    },
    "limitations": [
      "Latest years vary by indicator and country; inspect each ...",
      "Missing or revised observations are reported without inte...",
      "Official statistics only; not investment, legal, credit, ..."
    ],
    "metrics": {
      "gdpCurrentUsd": {
        "indicatorCode": "NY.GDP.MKTP.CD",
        "key": "gdpCurrentUsd",
        "name": "GDP (current US$)",
        "unit": "current USD"
      },
      "gdpGrowthAnnualPct": {
        "indicatorCode": "NY.GDP.MKTP.KD.ZG",
        "key": "gdpGrowthAnnualPct",
        "name": "GDP growth (annual %)",
        "unit": "percent"
      },
      "inflationAnnualPct": {
        "indicatorCode": "FP.CPI.TOTL.ZG",
        "key": "inflationAnnualPct",
        "name": "Inflation, consumer prices (annual %)",
        "unit": "percent"
      },
      "population": {
        "indicatorCode": "SP.POP.TOTL",
        "key": "population",
        "name": "Population, total",
        "unit": "people"
      }
    },
    "missingMetrics": [],
    "retrievedAt": "2026-08-12T00:33:37+00:00",
    "source": {
      "apiBaseUrl": "https://api.worldbank.org/v2",
      "countryUrl": "https://api.worldbank.org/v2/country/GBR?format=json",
      "dataset": "World Development Indicators",
      "provider": "World Bank"
    },
    "warnings": [],
    "window": {
      "endYear": 2026,
      "lookbackYears": 3,
      "startYear": 2024
    }
  },
  "meta": {
    "cached": false,
    "duration_ms": 42,
    "next_actions": [],
    "sources": [],
    "warnings": []
  },
  "request_id": "018f1f54-7f38-7ba2-8dc3-5f90272d9f1a",
  "service": "data.worldbank-snapshot",
  "version": "1"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://apiacre.com/v1/data/worldbank-snapshot' \
  -H 'content-type: application/json' \
  --data-raw '{"country_code":"GBR","lookback_years":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://apiacre.com/v1/data/worldbank-snapshot' \
  -H 'content-type: application/json' \
  --data-raw '{"country_code":"GBR","lookback_years":3}' \
  | 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 $0.005 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.005" });
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 $0.005 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapiacre.com%2Fv1%2Fdata%2Fworldbank-snapshot&method=POST
const res = await pay("https://apiacre.com/v1/data/worldbank-snapshot", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "country_code": "GBR",
    "lookback_years": 3
  }),
});
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 $0.005 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.005"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://apiacre.com/v1/data/worldbank-snapshot",
        json={
            "country_code": "GBR",
            "lookback_years": 3,
        },
    )
    print(res.status_code, res.text)