The x402 Flow
Machine-payable data APIs that settle per request over x402 (HTTP 402). No accounts, no API keys, no subscriptions.

Request
Your agent calls the endpoint. It gets back HTTP 402 with an exact price quote.

Pay
Settle in XRP or RLUSD on the XRP Ledger, or USDC on Base, Arbitrum, or Polygon. Custody-free: we never hold your funds or keys.

Receive
The paid response comes straight back. No signup, no invoice, no minimum.
API Services
Machine-payable data endpoints for autonomous AI agents. Settle per request over x402 (HTTP 402). No accounts, no API keys, no subscriptions.
FuelScout
fuelscout.scalpstream.com
Cheapest fuel near a location. Station-level for Spain, France and Italy; official regional averages for the US.
Free: your location resolved and the exact query built.
Paid: the ranked stations — names, prices and distances, with smart ranking that weighs the detour rather than the sticker price.
Live example: leaving San Diego
The nearest crossing loses. Raw feeds don't tell you that — the ranking does. And a SENTRI card turns that same 135-minute answer into 33 minutes.
LOCATION
ALL-IN TIME
STATUS
San Ysidro
143 min
Nearest
San Ysidro
143 min
Nearest
Tecate
135 min
Winner
San Ysidro
143 min
Nearest
Tecate
135 min
Winner
San Ysidro
143 min
Nearest
Built for Agents
ScalpStream is engineered for autonomous agents. We provide machine-payable data APIs that settle per request over x402 (HTTP 402), ensuring seamless integration into your agent architecture.
Discoverable
Protocol Ready
Free Previews
Custody-Free
DATA TRANSPARENCY
Every service states plainly what it is and is not. Fuel prices come from official government open data and may be delayed. Air quality is modelled, not a street-level sensor reading, and activity guidance is general public-health information, not medical advice. Border waits are CBP's own figures and change quickly. Research feeds are impersonal, general-circulation data — not investment advice.
