Superteam Frontier · Umbra Side Track
Private pay link plus the same bill for machines as an HTTP 402 resource until Umbra settlement, then 200 with structured content.
SDK call path
Real
Public USDC → receiver-claimable UTXO
Agent contract
x402
402 + accepts[] · 200 + content
REST routes
4
intents · resources · confirm · OpenAPI
Test layers
Vitest + Playwright
Unit + e2e on every PR