Syenite

Syenite — DeFi MCP Server for AI Agents

Retired. The hosted endpoint at syenite.ai/mcp has been shut down, and the package is deprecated on npm. The source remains here, unmaintained, under MIT.

Syenite ran from March to August 2026. It can still be run locally — see Running It Yourself — but nothing is hosted and no support is offered.

A DeFi interface for AI agents via the Model Context Protocol (MCP). One endpoint covered lending rates across Aave, Morpho, Compound, and Spark; yield discovery; swap and bridge routing across 30+ chains; Polymarket and Kalshi prediction markets; position alerts; and a trust layer that verified and simulated calldata before signing.

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What It Does

Syenite is an MCP server that gives AI agents composable access to DeFi. Agents can query borrow and supply rates across every major lending protocol, find yield opportunities from lending and staking to Pendle fixed-rate markets, route swaps and bridges via LI.FI aggregation, read Polymarket prediction markets and signals, and set webhook alerts for health factor changes. All execution tools return unsigned calldata — the agent passes it to a connected wallet; Syenite never holds keys.

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Running It Yourself

The hosted endpoint is gone, but stdio mode is self-contained — it talks directly to Aave, Morpho, LI.FI, Polymarket, and Kalshi, with no dependency on syenite.ai. Build from source:

git clone https://github.com/syenite-ai/syenite.git
cd syenite/mcp && npm install && npm run build

Then point an MCP client at it:

{
  "mcpServers": {
    "syenite": {
      "command": "node",
      "args": ["/absolute/path/to/syenite/mcp/dist/stdio.js"]
    }
  }
}

The last version published to npm was 0.5.0; this repo is at 0.6.3, so building from source is the only way to get the Kalshi and cross-exchange prediction tools.

Two caveats: the four alerts.* tools need a Postgres instance (DATABASE_URL) and will fail without one, and some upstream APIs may have changed since this stopped being maintained. Call syenite.help for the tool catalogue.

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Tools

Lending Rates

Tool	What it does	Protocols / chains
lending.rates.query	Borrow and supply rates for any asset	Aave v3, Morpho Blue, Spark, Compound v3, Fluid — Ethereum, Arbitrum, Base
lending.market.overview	Aggregate TVL, utilisation, rate ranges per protocol	Same protocols
lending.position.monitor	Health factor, liquidation distance, and cost for any address	Aave v3, Morpho Blue, Spark
lending.risk.assess	Risk assessment for a proposed lending position	Same protocols
strategy.carry.screen	Screen all markets for positive carry (supply APY > borrow APY)	All lending protocols

Lending Execution

Tool	What it does	Protocols / chains
lending.supply	Unsigned calldata to supply collateral	Aave v3, Morpho Blue, Spark, Compound v3
lending.borrow	Unsigned calldata to borrow an asset	Same protocols
lending.withdraw	Unsigned calldata to withdraw supplied collateral	Same protocols
lending.repay	Unsigned calldata to repay a borrow	Same protocols

Yield

Tool	What it does	Protocols / chains
yield.opportunities	Best yield across lending, staking, vaults, Pendle, and savings rate	Aave, Morpho, Spark, Lido, Rocket Pool, Pendle, Yearn, Ethena, Maker DSR
yield.assess	Deep risk assessment for a specific yield strategy	All sources
find.strategy	Composable scan: yield, carry, gas, optional prediction signals	Cross-protocol

Carry Trade

Tool	What it does	Protocols / chains
strategy.carry.screen	Find assets where supply APY exceeds borrow APY across all markets	Aave v3, Morpho, Compound, Spark

Swap & Bridge

Tool	What it does	Protocols / chains
swap.quote	Optimal swap or bridge quote with unsigned tx calldata	LI.FI aggregation — 30+ chains
swap.multi	Batch up to 10 swap/bridge quotes in parallel	Same
swap.status	Track cross-chain bridge delivery	Same

Prediction Markets

Tool	What it does	Protocols / chains
prediction.trending	Top Polymarket events by volume — probabilities, liquidity, spread	Polymarket
prediction.search	Search prediction markets by topic	Polymarket
prediction.book	Order book depth and spread for an outcome token	Polymarket
prediction.signals	Actionable signals: extreme probabilities, volume, mispricing-style flags	Polymarket

Position Alerts

Tool	What it does	Protocols / chains
alerts.watch	Register an address for health factor monitoring; optional webhookUrl for push	Aave v3, Morpho Blue, Spark
alerts.check	Poll for active alerts on watched addresses	Same
alerts.list	List all active watches	—
alerts.remove	Remove a watch	—

Wallet & Gas

Tool	What it does	Protocols / chains
wallet.balances	Native and stablecoin balances	Ethereum, Arbitrum, Base, BNB Chain
gas.estimate	Live gas prices and per-operation cost estimates; finds the cheapest chain	Same

Trust Layer

Tool	What it does	Protocols / chains
tx.verify	Verify a contract via Etherscan, Sourcify, and Syenite protocol registry; surfaces risk flags	Any EVM chain
tx.simulate	eth_call simulation: revert detection, gas estimate, native value effects	Ethereum, Arbitrum, Base
tx.guard	Apply your own rules: value caps, allowlists, blocklists, registry requirement	—
tx.receipt	Post-signing confirmation: status, gas cost, decoded events, token transfers	Any EVM chain

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Supported Protocols

Protocol	Category	What Syenite provides
Aave v3	Lending	Supply/borrow rates, position monitoring, execution calldata
Morpho Blue	Lending	Supply/borrow rates, market overview, execution calldata
Compound v3	Lending	Supply/borrow rates, execution calldata
Spark	Lending	Supply/borrow rates, position monitoring, execution calldata
Pendle	Yield	Fixed-rate and yield-tokenisation opportunities via yield.opportunities
LI.FI	Swap/bridge	Aggregated routing across DEXs and bridges on 30+ chains
Polymarket	Prediction markets	Market data, order books, trending events, actionable signals

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Supported Chains

Swap and bridge (via LI.FI): Ethereum, Arbitrum, Base, Optimism, Polygon, BNB Chain, Avalanche, zkSync, Linea, Scroll, Gnosis, Fantom, and 20+ more.

Lending rates, execution, and position monitoring: Ethereum, Arbitrum, Base (per protocol availability).

Wallet, gas, and trust simulation: Ethereum, Arbitrum, Base, BNB Chain.

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How Execution Works

All execution tools (lending.supply, lending.borrow, lending.withdraw, lending.repay, swap.quote) return unsigned transactionRequest objects — calldata ready to sign. The recommended flow:

1. Get the calldata from the relevant tool.
2. Run tx.verify and tx.simulate to check the contract and preview effects.
3. Optionally run tx.guard to enforce value caps or allowlists.
4. Sign and submit from your own wallet.
5. Confirm with tx.receipt.

Syenite never holds private keys or custody of funds.

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Agent Integration

Syenite is designed for agent-native DeFi workflows. Every tool is an atomic primitive: agents compose them to achieve outcomes like "find the best lending rate for wBTC, supply collateral, and set a health factor alert."

The server included scaffolding for ERC-8004 on-chain agent registration (Ethereum, Arbitrum, Base, BNB Chain) via src/scripts/register-agent.ts, and served an x402-flagged .well-known/agent-registration.json. No agent IDs were ever configured in production, so the served registration list was always empty.

The server.json manifest includes a systemPrompt field that MCP clients can inject to orient the agent on Syenite's capabilities automatically.

Call syenite.help for the full capability overview including all tool parameters.

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Yield Sources

Source	Type
Aave v3, Morpho Blue, Spark, Compound v3	Lending supply APY
Lido (stETH/wstETH), Rocket Pool (rETH), Coinbase (cbETH)	Liquid staking
Maker DSR (sDAI)	Savings rate
MetaMorpho (Steakhouse, Gauntlet), Yearn v3	Vaults
Pendle	Fixed-rate / yield tokenisation
Ethena (sUSDe)	Basis capture

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Project Structure

syenite/
├── mcp/          # MCP DeFi server (live at syenite.ai/mcp)
├── docs/         # Architecture, planning, research, commercial
├── contracts/    # Solidity vault contracts (parallel build)
├── keeper/       # Keeper agent infrastructure
└── frontend/     # Minimal UI

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Status

Retired as of August 2026. The hosted endpoint, the docs site, and the usage dashboard are all offline. @syenite/mcp is deprecated on npm and the MCP Registry listing has been removed.

Final tally: 46 tools across 8 protocol families, ~20k lines of TypeScript, and 574 logged calls over five months — most of them from an automated registry health-check rather than real users.

Source: github.com/syenite-ai/syenite · MIT