sardis 0.3.1

Payment OS for the Agent Economy — non-custodial MPC wallets with natural language spending policies for AI agents

Sardis

The Payment OS for the Agent Economy

AI agents can reason, but they cannot be trusted with money. Sardis is how they earn that trust.

Sardis gives AI Agents (Claude, Cursor, Autonomous Bots) non-custodial MPC wallets with natural language spending policies. It's Stripe + IAM + Risk Engine for the Agent Economy.

The Problem We Solve: Financial Hallucination — agents accidentally spending $10k instead of $100 due to retry loops, decimal errors, or logic bugs. Sardis prevents this with a real-time policy firewall.

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Quick Start

Python

pip install sardis

from sardis import SardisClient

client = SardisClient(api_key="sk_...")
wallet = client.wallets.create(name="my-agent", chain="base", policy="Max $100/day")
tx = wallet.pay(to="0x...", amount="25.00", token="USDC")

TypeScript

npm install @sardis/sdk

import { Sardis } from '@sardis/sdk';

const client = new Sardis({ apiKey: 'sk_...' });
const wallet = await client.wallets.create({ name: 'my-agent', chain: 'base' });
const tx = await wallet.pay({ to: '0x...', amount: '25.00', token: 'USDC' });

MCP (Claude Desktop / Cursor)

npx @sardis/mcp-server start

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "sardis": {
      "command": "npx",
      "args": ["@sardis/mcp-server", "start"]
    }
  }
}

That's it. Your agent now has a wallet with spending limits.

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How It Works

User: "Buy OpenAI API credits for $20"

Agent: sardis.pay("OpenAI", $20, "API Credits")
       |
Sardis: Policy Check -> SaaS Category OK -> Amount < Limit OK
       |
       APPROVED
       Card: 4242 **** **** 9999

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User: "Buy me an Amazon gift card for $500"

Agent: sardis.pay("Amazon", $500, "Gift Card")
       |
Sardis: Policy Check -> Retail Category BLOCKED
       |
       BLOCKED - Financial Hallucination PREVENTED

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Architecture

                         AI AGENT
              (Claude, Cursor, LangChain)
                          |
                     MCP / SDK
                          |
                  SARDIS POLICY ENGINE
         Natural Language | Merchant    | Amount
         Rules            | Allowlist   | Limits
                          |
                     MPC SIGNING (Turnkey)
                    Non-custodial keys
                          |
               +----------+----------+
               |                     |
         On-Chain Rails         Fiat Rails
         USDC on Base          Virtual Cards
         Polygon, ETH           (Lithic)

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Packages

Python (PyPI)

Package	Description
sardis	Meta-package — installs SDK + Core + CLI
sardis-sdk	Production Python SDK
sardis-core	Domain models and config
sardis-chain	Multi-chain execution
sardis-compliance	KYC/AML/SAR
sardis-cards	Virtual cards (Lithic)
sardis-wallet	Wallet orchestration
sardis-ledger	Append-only audit trail
sardis-api	FastAPI gateway
sardis-protocol	AP2/TAP verification
sardis-a2a	Agent-to-Agent protocol
sardis-ucp	Universal Commerce Protocol
sardis-ramp	Fiat on/off-ramp
sardis-cli	Command-line interface
sardis-checkout	Merchant checkout flows

pip install sardis          # SDK + Core + CLI
pip install sardis[all]     # Everything
pip install sardis[cards]   # + virtual cards

TypeScript (npm)

Package	Description
@sardis/sdk	TypeScript SDK
@sardis/mcp-server	MCP server (46 tools)
@sardis/ai-sdk	Vercel AI SDK integration
@sardis/ramp	Fiat on/off-ramp

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Framework Integrations

Framework	Package	Status
Claude Desktop / Cursor	@sardis/mcp-server	Stable
LangChain	sardis-sdk	Stable
Vercel AI SDK	@sardis/ai-sdk	Stable
OpenAI Functions / Swarm	sardis-sdk	Stable
LlamaIndex	sardis-sdk	Beta
CrewAI	sardis-sdk	Beta
Mastra	@sardis/sdk	Beta

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Key Features

Feature	Description
Non-Custodial MPC	Keys secured via Turnkey threshold signatures
Natural Language Policies	"Allow $50/day for SaaS only"
Financial Firewall	Block hallucinations before they cost money
Virtual Cards	Instant card issuance for fiat payments (Lithic)
Multi-Chain	Base, Polygon, Ethereum, Arbitrum, Optimism
5 Protocols	AP2, TAP, UCP, A2A, x402
MCP Native	Zero-integration setup for Claude/Cursor
Compliance	KYC (Persona), AML (Elliptic), SAR reporting

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Project Status

Component	Status
Core Policy Engine	Live (150+ tests)
MPC Wallets (Turnkey)	Live
On-Chain Settlement	Live (5 chains)
KYC/AML Compliance	Integrated (Persona, Elliptic)
MCP Server	v0.2.5 (46 tools)
Python SDK (15 packages)	Live on PyPI
TypeScript SDK (4 packages)	Live on npm
Virtual Cards (Lithic)	Sandbox Ready
5 Protocols	AP2, TAP, UCP, A2A, x402

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Open Core Licensing

• MIT License — SDKs, MCP Server, Integration Adapters

  • sardis (Python meta-package)
  • @sardis/sdk, @sardis/mcp-server, @sardis/ai-sdk

• Proprietary — Core Banking Infrastructure, Policy Engine internals, MPC Node management

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Links

• Website: sardis.sh
• Documentation: sardis.sh/docs
• GitHub: github.com/EfeDurmaz16/sardis
• PyPI: pypi.org/project/sardis
• npm: npmjs.com/package/@sardis/mcp-server
• Context7: context7.com/efedurmaz16/sardis

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Sardis — The Payment OS for the Agent Economy
Non-Custodial | MCP Native | Financial Hallucination Prevention

© 2026 Efe Baran Durmaz