NDBC Buoy Feed

Real-time marine observations from NOAA's National Data Buoy Center station 41001 (150 NM east of Cape Hatteras): wind, waves, pressure, and sea temperature as fixed-width text. Machine-payable per request.

Robinhood Chain

Offers

Offer	Endpoint	Price
Station 41001 realtime Latest 45 days of standard meteorological data for buoy 41001, newest first, in NDBC text format. No params needed.	`/m/ndbc-buoys/station-41001`	0.002 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/ndbc-buoys/station-41001', {
  headers: { 'payment-signature': signedPaymentPayload },
})

Or inspect the challenge yourself:

curl -i https://api.meshgateway.co/m/ndbc-buoys/station-41001
# HTTP/1.1 402 Payment Required
# WWW-Authenticate: Payment id="…", method="evm", intent="charge", …