Overview
Sardis is the Payment OS for the Agent Economy — infrastructure enabling AI agents to make real financial transactions safely.
What is Sardis?
Sardis is infrastructure that enables AI agents to make real financial transactions safely through non-custodial MPC wallets with natural language spending policies.
AI agents can reason, but they cannot be trusted with money. Sardis is how they earn that trust.
Key Capabilities
- Non-Custodial MPC Wallets — Agent wallets secured by Turnkey MPC. No private keys stored.
- Natural Language Policies — Define spending rules in plain English: "Max $100/day, only OpenAI and Anthropic"
- Spending Mandates — Machine-readable payment permissions with scoped, time-limited, revocable authority
- Multi-Rail Payments — Stablecoins (USDC/USDT/EURC), virtual cards, and bank transfers through a single API
- Policy Engine — Every transaction passes compliance and policy checks before execution
- Audit Trail — Append-only ledger for every transaction with full provenance
Supported Chains
| Chain | Tokens |
|---|---|
| Base | USDC, EURC |
| Polygon | USDC, USDT, EURC |
| Ethereum | USDC, USDT, PYUSD, EURC |
| Arbitrum | USDC, USDT |
| Optimism | USDC, USDT |
Architecture
AI Agent → MCP/SDK → Policy Engine → MPC Signing → Chain ExecutionEvery payment follows this flow:
- Agent requests payment via SDK, MCP, or API
- Policy Engine evaluates spending limits, merchant rules, compliance
- MPC wallet signs the transaction (non-custodial, no stored keys)
- Chain executor broadcasts to the target blockchain
- Audit trail records the full transaction provenance