the defi interface for ai agents · open access · no api key

syenite

One MCP endpoint for swaps, bridges, yield, lending, and risk across 30+ chains. Intelligence and execution in one place — agents read data, get quotes, and receive unsigned transactions ready to sign.

Docs

quick start

Claude Desktop / Cursor

{
  "mcpServers": {
    "syenite": {
      "url": "https://syenite.ai/mcp"
    }
  }
}

cURL

$ curl -X POST https://syenite.ai/mcp \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -d '{
    "jsonrpc": "2.0",
    "method": "tools/list",
    "id": 1
  }'

No API key needed. Just add the URL and start querying.

tools

syenite.help

Service info, available tools, supported chains, and how to get started.

swap & bridge

swap.quote

Get an optimal swap or bridge quote with unsigned transaction calldata. Same-chain swaps and cross-chain bridges via aggregated routing (1inch, 0x, Paraswap, and more). 30+ chains.

fromTokenstringToken to sell — symbol or address toTokenstringToken to buy — symbol or address fromAmountstringAmount in smallest unit (e.g. 1000000 for 1 USDC) fromAddressstringSender wallet address fromChainstring"ethereum", "arbitrum", "base", "optimism", "polygon", etc. toChainstringDestination chain (defaults to fromChain) slippagenumberMax slippage as decimal (0.005 = 0.5%) orderstring"CHEAPEST" or "FASTEST"

swap.status

Track execution status of a cross-chain bridge. Returns status, receiving tx hash, and amount received.

txHashstringTransaction hash of the submitted swap/bridge fromChainstringChain where tx was submitted toChainstringDestination chain

yield

yield.opportunities

Find the best DeFi yield for any asset. Aggregates lending supply, liquid staking, vaults, savings rates, and basis capture across blue-chip protocols.

assetstring"ETH", "USDC", "DAI", "stables", or "all" categorystring"lending-supply", "liquid-staking", "vault", "savings-rate", "basis-capture", or "all" riskTolerancestring"low", "medium", or "high" (default)

yield.assess

Deep risk assessment for a specific yield strategy. Smart contract risk, oracle dependency, governance, liquidity, depeg risk, position sizing, and comparable alternatives.

protocolstring"Aave", "Lido", "Morpho", "Ethena", "Yearn", "Maker", etc. amountnumberUSD amount to deposit (optional, enables sizing analysis) assetstringAsset context for finding alternatives

lending

lending.rates.query

Real-time borrow and supply rates across Aave v3, Morpho Blue, and Spark for any collateral type.

collateralstring"wBTC", "WETH", "wstETH", "BTC", "ETH", or "all" borrowAssetstring"USDC", "USDT", "DAI", or "GHO"

lending.market.overview

Aggregate market view. Per-protocol TVL, utilization, rate ranges, and available liquidity.

collateralstringFilter by asset, category, or "all"

lending.position.monitor

Health check for any DeFi lending position. LTV, health factor, liquidation price, and estimated annual cost.

addressstringEthereum address to check protocolstring"aave-v3", "morpho", "spark", or "all"

lending.risk.assess

Risk assessment for a proposed lending position. Risk score, liquidation analysis, protocol risk, and position sizing.

collateralstring"wBTC", "tBTC", "cbBTC", "WETH", "wstETH", "rETH", "cbETH", "weETH" collateralAmountnumberAmount of collateral asset targetLTVnumberDesired LTV (1–99) protocolstring"aave-v3", "morpho", "spark", or "best"

how execution works

Syenite never holds private keys. The swap.quote tool returns an unsigned transactionRequest containing the optimal route calldata. The agent or user signs and submits the transaction from their own wallet. For cross-chain bridges, use swap.status to track execution progress.

Routing is aggregated across 1inch, 0x, Paraswap, and bridge protocols via Li.Fi. Quotes are optimised for best price or fastest execution.

supported chains

Swap and bridge routing supports 30+ chains including Ethereum, Arbitrum, Optimism, Base, Polygon, BSC, Avalanche, zkSync, Linea, Scroll, Gnosis, and Fantom.

Yield intelligence and lending data cover Ethereum mainnet protocols.

yield sources

Category	Protocols	Assets
Lending Supply	Aave v3, Morpho Blue, Spark	USDC, USDT, DAI, GHO
Liquid Staking	Lido, Rocket Pool, Coinbase	ETH → stETH, rETH, cbETH
Savings Rate	Maker DSR	DAI → sDAI
Vaults	MetaMorpho, Yearn v3	USDC, USDT, WETH
Basis Capture	Ethena	USDe → sUSDe

lending protocols

All lending data read directly from on-chain contracts via Ethereum RPC. Prices use Chainlink feeds. Cached briefly (15–60s).

Protocol	Collateral
Aave v3	wBTC, tBTC, cbBTC, WETH, wstETH, rETH, cbETH, weETH
Morpho Blue	wBTC, tBTC, cbBTC, wstETH, WETH
Spark	wBTC, tBTC, WETH, wstETH, rETH, weETH

access

Open access — no API key required. Rate limited to 30 requests/minute per IP. Just point your agent at the endpoint and start querying.