Protocols
The gateway implements these open standard protocols across its surface types, federation transport, and payment layer. Not all are surface protocols. DIDComm is the encrypted transport used for gateway-to-gateway (G2G) federation. The x402 protocol is used for agent payment paywalls.
| Concept | Used in | What it explains |
|---|---|---|
| A2A | Surfaces | Google Agent-to-Agent protocol: structured task execution between agents. |
| MCP | Surfaces | Model Context Protocol: tool, resource, and prompt serving for AI models. |
| AP2 | Surfaces | Agent Payments Protocol: AI-driven payments with verifiable credential transformation. |
| DIDComm | Gateway federation (G2G) | End-to-end encrypted messaging transport used for gateway-to-gateway federation. |
| x402 | Surface policy | HTTP-native payment protocol enabling on-chain micropayments between agents. |
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