Machine Payments Protocol (MPP)
MPP is an open payment protocol for machines, enabling AI agents to pay for resources over HTTP without API keys or billing accounts. Zeny supports both MPP intents: charge and session.
MPP vs x402
| Aspect | x402 | MPP |
|---|---|---|
| Model | Per-request payment | Charge + session streaming |
| Headers | Payment-Required / Payment-Signature | WWW-Authenticate / Authorization |
| Best for | One-off API calls | Streaming, high-frequency use |
Intents
- Charge Intent — One-time payment per request
- Session Intent — Streaming micropayments via payment channels