Eunomia is a non-custodial treasury for AI-agent spending on Stellar. Owners create and fund a treasury with XLM or USDC, set payment limits and approved payees, then connect an agent through an MCP server using a time-limited, capped credential called a Leash. The treasury contract checks payments on-chain and can reject out-of-policy transactions; owners can pause spending, revoke agent authority, or withdraw funds. Passkey and Stellar-wallet setup are supported. The product also documents escrow and x402 payment flows; confidential-compliance proofs are described as not deployed in the beta.