USDC settlement
Settling marketplace transactions in USDC, a fully reserved US-dollar stablecoin, so buyers and sellers clear in a stable unit on a fast rail.
USDC settlement means clearing what buyers owe and sellers earn in USDC, a US-dollar-denominated stablecoin backed by reserves. Because USDC holds a stable value, both sides price and settle in dollars without taking on the volatility of a floating crypto asset, while still moving value on a programmable blockchain rail that an agent can use directly.
Proxygate uses USDC on Solana as its primary settlement rail. Buyers deposit USDC into a prepaid balance, the gateway meters each call and draws against that balance, and sellers are settled in USDC for their share of the metered usage. Prices across the marketplace are quoted in micro-USDC (one USDC equals 1,000,000 micro-USDC) so per-request amounts can be expressed precisely.
Settling in a stable, programmable unit is what lets autonomous agents transact without human intervention. There is no card network, no invoice, and no currency conversion to manage at call time. The marketplace remains rail-agnostic above this layer: USDC on Solana and x402 are live today, with additional rails such as SEPA and the Machine Payment Protocol on the roadmap, but the unit of account stays a stable dollar.
Related concepts
USDC settlement: frequently asked questions
USDC settlement is clearing marketplace transactions in USDC, a reserve-backed US-dollar stablecoin. Buyers and sellers price and settle in a stable dollar unit while moving value on a fast, programmable blockchain rail.
Proxygate uses USDC on Solana as its primary settlement rail, with x402 also live today. Buyers fund a prepaid USDC balance and sellers are settled in USDC for their share of metered usage.
USDC holds a stable US-dollar value, so neither buyer nor seller takes on crypto price swings between a call and its settlement, while still gaining a programmable rail that autonomous agents can use without a card network or invoice.