Sui Rolls Out Seal MPC on Mainnet for Autonomous AI Agents

June 19, the Sui Network announced the launch of its Seal Multi-Party Computation (Seal MPC) feature on the mainnet, which is a major step in developing secure infrastructure for autonomous AI agents.

Seal is described as a programmable access layer for data, AI, and digital assets that enables decentralized encryption and access controls.

By using MPC technology, the system is using distributed cryptographic control to access multiple independent parties, ensuring that no single entity, including an AI agent, can unilaterally move funds or access encrypted data. 

The first mainnet MPC committee operates with a 5-of-8 threshold, involving 8 node operators. Developers now have the flexibility to deploy independent major servers, MPC committees, or hybrid configurations, allowing for stronger and more tailored trust models. The platform also supports natural language spending rules through Move smart contracts, enabling users to define AI payment policies such as daily caps or counterparty restrictions. This launch builds on a decentralized key server prototype that was introduced on Sui’s testnet in March 2026.

How Seal MPC Works

Seal allows sensitive information, such as AI models, user preferences, or agent memory, to remain encrypted off-chain or in decentralized storage systems like Walrus. At the same time, access rights to this data are governed by smart contracts on the Sui blockchain. Developers can set these policies using the Move programming language, and decryption of the data can only happen if the programmable rules are satisfied.

With the addition of Seal MPC, trust is further decentralized. Instead of relying on a single key server, a committee of operators jointly protects key shares using threshold cryptography and distributed key generation. 

In its initial configuration, the committee uses a 5 of 8 setup, involving participants such as Mysten Labs and Triton One. No single party holds the full key. When a request is made, it goes through an aggregator that combines the partial responses from committee members, and the client decrypts the data locally. The master key never exists in one place. 

There are many major benefits of this approach. Committee members can be rotated without requiring re-encryption, meaning the public key and policies can stay stable even as the committee changes. Developers have flexible configuration options, as they can mix independent key servers, MPC committees, or hybrid setups with the same software development kit. The system integrates with the Sui AI  stack and pairs with Walrus for decentralized storage. This supports use cases such as secure agent memory, programmable wallets, and agentic commerce. 

Growth in AI Agent Payments 

The launch of Seal MPC comes at a time of explosive growth in what is being called the agentic economy. AI agents are moving beyond simply offering advice and suggestions. They are becoming autonomous actors that carry out transactions, manage assets, and coordinate economic activity on their own.

According to projections from McKinsey, the global agentic commerce market could reach between $3 and $5 trillion by 2030. In the United States alone, the business-to-consumer segment could generate up to $1 trillion in orchestrated revenue.

The agentic payments market is also expected to grow significantly, with forecasts suggesting it could increase to $93 billion by 2032. Estimates for the broader AI agent market in 2026 range from about $8 to $12 billion, with strong compound annual growth rates projected through 2030. In the crypto sector, AI agents need infrastructure that can handle micro-transactions, stablecoin payments, and settlements between agents.