Dexter Brings Managed Settlement to the Machine Payments Protocol
Dexter launches @dexterai/mpp — the first managed settlement service for MPP on Solana. Accept machine payments without running blockchain infrastructure. One package, no RPC, no gas wallet, no keys.
The News
MARCH 2026 — Dexter, the most-used x402 facilitator by daily transaction volume, today announces @dexterai/mpp — a managed Solana settlement service for the Machine Payments Protocol.
MPP, co-authored by Stripe and Tempo, launched this week as an open standard for machine-to-machine payments. The Solana Foundation published a reference SDK for self-hosted settlement. Dexter is taking a different approach: hosted settlement as a service.
With @dexterai/mpp, sellers install one package, set a recipient wallet address, and start accepting Solana USDC payments through MPP immediately. Dexter's infrastructure handles transaction co-signing, simulation, broadcast, confirmation, and fee sponsorship — the same production-grade settlement pipeline that has processed millions of x402 transactions.
Why This Matters
MPP is a well-designed protocol. But accepting payments on Solana still requires operating blockchain infrastructure: RPC connections, a fee payer wallet funded with SOL, transaction retry logic, key management, balance monitoring, and edge case handling for smart wallets and failed settlements.
Most developers building APIs, AI tools, and agent services don't want to run that. They want payments to work.
Dexter's managed settlement removes the infrastructure burden entirely. The seller's server never touches the Solana network directly. Every transaction flows through Dexter's settlement API, which applies the same security validation, backpressure controls, and fee sponsorship that has been battle-tested across millions of payments.
How It Works
When a client requests a paid resource, the seller's server asks Dexter for a fee payer address and a fresh blockhash. The client builds and partially signs a USDC transfer transaction. The seller forwards that transaction to Dexter, which validates, co-signs as fee payer, simulates, broadcasts, confirms on-chain, and returns a receipt.
The seller never holds a private key. The buyer never pays gas. Dexter sponsors all transaction fees.
What Sellers Get
| Capability | Details |
|---|---|
| Zero blockchain operations | No RPC connections, no fee payer wallet, no SOL balance to maintain |
| Gas-free for buyers | Dexter sponsors all Solana transaction fees — buyers only need USDC |
| Production-grade security | Program allowlists, compute budget caps, fee payer isolation, smart wallet support |
| Backpressure controls | Redis-backed rate limiting prevents abuse before any gas is spent |
| Open access | No API keys, no accounts — same open model as the x402 facilitator |
| Standard MPP protocol | Works with any mppx client across HTTP and MCP transports |
The Bigger Picture
Yesterday, Stripe and Tempo launched MPP with support for Tempo, Lightning, and card-based payments. The Solana Foundation published a reference SDK for self-hosted Solana settlement.
Dexter is adding a third option: managed Solana settlement. This is the same model that made x402 accessible — a hosted service that handles the hard parts so developers can focus on building.
The x402 facilitator isn't going anywhere. It continues to power half of all daily x402 transactions. @dexterai/mpp extends Dexter's settlement infrastructure to the MPP ecosystem, giving sellers a single provider that works across both protocols.
Available Now
- npm: @dexterai/mpp
- Settlement API: x402.dexter.cash/mpp/prepare and x402.dexter.cash/mpp/settle
- GitHub: github.com/Dexter-DAO/dexter-mpp
- Documentation: See the README for server and client integration guides