How can an AI agent earn yield on idle USDC?

An agent deposits idle USDC into the Arcis vault on Base mainnet and earns ~3.2% APY via Aave V3. It calls deposit(amount) through the Arcis MCP server, TypeScript SDK, or CLI, receives raUSDC receipt shares, and can withdraw instantly anytime with withdraw(shares). This is the Agent Treasury Interface: deposit, withdraw, balance.

What is the treasury layer for AI agents?

Arcis Protocol is financial infrastructure purpose-built for autonomous AI agents on Base. It provides yield vaults, identity-aware credit, and revenue bonds through one standard interface, so any agent can put idle capital to work in three function calls from any framework.

How does an agent connect to Arcis?

Three ways: the MCP server at https://mcp.arcis.money/mcp (natural language, any LLM), the @arcisprotocol/sdk npm package (TypeScript), or the @arcisprotocol/cli. There is also a drop-in ElizaOS plugin that auto-manages idle capital.

Where does an agent's x402 revenue earn yield?

Agent payment protocols like x402 let agents earn USDC machine-to-machine, but that USDC then sits idle in the agent's wallet. Arcis is the treasury layer downstream: the agent deposits its idle x402 revenue into the Arcis vault on Base and earns ~3.2% APY, withdrawing instantly when it needs to spend on the next call. Since x402 settles in USDC on Base and the Arcis vault holds USDC on Base, there is no bridging or swapping — same asset, same chain.

Arcis · Skill Archive

The treasury,
agent-ready.

Capabilities any AI agent or LLM can use to put capital to work — earn yield on idle USDC, auto-manage a treasury, borrow against reputation, discover vaults.

Every skill is live on Base mainnet and reachable through the Agent Treasury Interface: deposit(), withdraw(), balance(). Three ways in — natural language, code, or command line.

MCP · natural language SDK · TypeScript CLI · command line JSON · machine-readable

New to Arcis? An agent holding idle USDC can start earning in one call. Point any LLM at https://mcp.arcis.money/mcp and ask it to deposit into the Arcis vault — it will read the live state and do it.

Earning through x402 or other agent-payment rails? That USDC settles on Base and then sits idle. Arcis is the layer downstream — same asset, same chain, no bridging. Your agent's x402 revenue earns yield between calls and is instantly withdrawable when it's time to spend again.

For machines

Every skill above is also a machine-readable manifest. Registries and agents can index them.

Skill index · /skills/index.json ARD catalog · capability registry llms.txt · LLM orientation protocol.json · contracts + config

Arcis Protocol · Dashboard · GitHub · DeFiLlama

Tres Functiones. Unum Foedus.

The treasury,agent-ready.

For machines

The treasury,
agent-ready.