Packet

Packet is an on-chain messaging and order protocol on Solana that turns inbox, thread, room and message into composable accounts: one-to-one conversations use X25519 for key exchange, groups use broadcast encryption over the BLS12-381 curve with the group key rotated each epoch and distributed through compact on-chain headers, while message history sits on Irys and only compressed state pointers remain on-chain, with compression handled by Light Protocol.

It addresses two gaps in on-chain communication, namely that message content is public and that messages cannot carry payment or execution conditions. Packet writes payment gating into the messaging layer so a sender can escrow funds in an account that the recipient can claim only after replying, and the same structure carries order quotes and confirmations. The command-line tool shipped on 18 May 2026 and Packet MCP followed on 28 May, letting agents hold a wallet-native inbox, receive encrypted messages, send and receive payments and react to on-chain events. Its narrative role is the communication layer for agents, tying messages, funds and execution to one account system.