World Bank Data

Country profiles and 16,000+ development indicators (GDP, population, inflation, energy) from World Bank open data. Machine-payable per request.

Robinhood Chain

Offers

Offer	Endpoint	Price
Country profile Region, income level, capital, and coordinates for a country. Append an ISO code to the path, e.g. country/JPN?format=json, or list all with country?format=json&per_page=300.	`/m/world-data/country`	0.005 USDG
Development indicator Time series for one indicator and country. Append {iso}/indicator/{code} to the path, e.g. indicator/USA/indicator/NY.GDP.MKTP.CD?format=json&date=2015:2024. Common codes: SP.POP.TOTL (population), FP.CPI.TOTL.ZG (inflation).	`/m/world-data/indicator`	0.005 USDG

Machine-readable: openapi.json with x-payment-info offers.

Try it live

Run the full MPP flow from your browser: catch the 402, sign the payment with your wallet, and watch it settle on-chain.

Pay with an agent

Any MPP or x402-compatible client works. With mppx, payment is automatic:

// x402 exact scheme (permit2) on Robinhood Chain
// 1. GET the endpoint, read the payment-required header (base64 JSON)
// 2. Sign PermitWitnessTransferFrom against Permit2 for the advertised offer
//    (spender = x402ExactPermit2Proxy, witness.to = merchant wallet)
// 3. Retry with the payment-signature header; settlement tx arrives
//    in the payment-response header
const res = await fetch('https://api.meshgateway.co/m/world-data/country', {
  headers: { 'payment-signature': signedPaymentPayload },
})

Or inspect the challenge yourself:

curl -i https://api.meshgateway.co/m/world-data/country
# HTTP/1.1 402 Payment Required
# WWW-Authenticate: Payment id="…", method="evm", intent="charge", …