Guides and analysis on agentic payments: MPP on Stellar, x402 on Stellar, and paying AI APIs with Stellar USDC.
The wire flow, not the theory: the real 402 our router returns on Stellar, what the paid retry does, why an agent needs no gas token, and when to open a session instead of paying per call.
Both protocols speak HTTP 402 and settle in Stellar USDC, but they differ on facilitators, sessions, and gas. A side-by-side for developers choosing between MPP and x402 on Stellar.
MPP Router is a payment proxy: agents pay once in USDC on Stellar, and the router settles with MPP and x402 merchants on Tempo and Base. How it works, what it costs, and what it is not.
A step-by-step guide for agents and developers: fund one Stellar wallet with USDC, point at apiserver.mpprouter.dev, and pay per request. No API keys, no card, no bridging.
The launch-week takes said MPP was Tempo-only. The spec's own payment-methods list now includes Stellar, Solana, Monad, NEAR Intents and more. What changed, and what it means for agents that hold Stellar USDC.