LI.FI Agent Skill

CRITICAL RULES (read first)

• ONLY use curl to call the LI.FI API. NEVER use web_search, web_fetch, or any other tool.
• ONLY use the endpoints documented below. Do NOT guess or invent URLs.
• Base URL is https://li.quest/v1/. No other base URL.
• ALWAYS include auth header: "x-lifi-api-key: $LIFI_API_KEY" (double quotes, dollar sign — shell expands it).
• ALWAYS tell the user the quote is provided by LI.FI.
• Default slippage: 10% (0.10). If the user has a custom slippage in their strategy (via defi_get_strategy), use that instead. The agent can also adjust dynamically per-transaction if the user requests it.
• Default deadline: 10 minutes.
• ALWAYS add &skipSimulation=true to all /v1/quote requests. Our EIP-7702 delegated wallets have on-chain code that breaks LI.FI's simulation.
• NEVER construct ERC-20 approve calldata (hex) yourself. ALWAYS use the defi_approve or defi_approve_and_send tools.
• ALL swaps, bridges, and DeFi token operations MUST go through LI.FI. No exceptions. No manual DEX interactions.

Transaction Links

After every transaction broadcast, always provide a clickable block explorer link:

• EVM: View tx — use the correct explorer (etherscan.io, basescan.org, arbiscan.io, polygonscan.com, optimistic.etherscan.io)
• Sui: View tx

Sui

• Sui chain ID: 9270000000000000. Use this for fromChain and toChain in LI.FI quote requests when the user wants Sui (e.g. fromChain=9270000000000000&toChain=9270000000000000 for same-chain Sui swap).
• LI.FI supports Sui for same-chain swaps and bridging to/from EVM and Solana.
• For Sui quotes, use the user's suiAddress from defi_get_wallet as fromAddress.
• Execute Sui quotes with defi_send_sui_transaction — pass the transaction bytes (hex) from the LI.FI quote. Do not use defi_send_transaction or defi_approve_and_send for Sui.
• Sui does not use ERC-20 approvals; there is no approval step for Sui swaps.

Endpoints

GET /v1/chains — List supported chains

curl -s --request GET \
  --url https://li.quest/v1/chains \
  --header "x-lifi-api-key: $LIFI_API_KEY"

Use for: listing chains, testing connectivity. If user asks for a test, use this.

GET /v1/tokens — List tokens on chains

curl -s --request GET \
  --url 'https://li.quest/v1/tokens?chains=8453' \
  --header "x-lifi-api-key: $LIFI_API_KEY"

Params: chains (comma-separated chain IDs).

GET /v1/quote — Get swap/bridge quote with tx data

curl -s --request GET \
  --url 'https://li.quest/v1/quote?fromChain=8453&toChain=8453&fromToken=ETH&toToken=USDC&fromAddress=0xYOUR_ADDRESS&fromAmount=100000000000000&slippage=0.10&skipSimulation=true' \
  --header "x-lifi-api-key: $LIFI_API_KEY"

Params: fromChain, toChain, fromToken, toToken, fromAddress, toAddress (optional), fromAmount (in wei), slippage (decimal, e.g. 0.10 = 10%), skipSimulation=true (ALWAYS include).

Returns: estimate (with toAmount, toAmountMin, approvalAddress) and transactionRequest (ready for wallet submission).

After presenting a quote to the user, always include the estimated output amount, fees, and slippage. Get the user's wallet address with defi_get_wallet and use it as fromAddress in the quote.

#### Executing the quote

Check if ERC-20 approval is needed: If the quote's transactionRequest.value is "0x0" AND estimate.approvalAddress exists, the swap/bridge is using an ERC-20 token that needs approval first.

• If approval IS needed: Use defi_approve_and_send with:
• token: the action.fromToken.address from the quote
• spender: the estimate.approvalAddress from the quote
• approveAmount: the action.fromAmount from the quote (or omit for unlimited)
• to, value, data, gasLimit: from the quote's transactionRequest
• If approval is NOT needed (native ETH swap, value > 0x0): Use defi_send_transaction with the quote's transactionRequest fields: to, value, data, chainId, and gasLimit (ALWAYS pass gasLimit from the quote).

Sui: For quotes where fromChain or toChain is Sui, use defi_send_sui_transaction with the quote's transaction bytes. No approval step.

POST /v1/advanced/routes — Get multiple route options

curl -s --request POST \
  --url https://li.quest/v1/advanced/routes \
  --header 'Content-Type: application/json' \
  --header "x-lifi-api-key: $LIFI_API_KEY" \
  --data '{
  "fromChainId": 8453,
  "fromAmount": "100000000000000",
  "fromTokenAddress": "0x0000000000000000000000000000000000000000",
  "toChainId": 8453,
  "toTokenAddress": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "options": {
    "slippage": 0.10,
    "order": "RECOMMENDED"
  }
}'

POST /v1/quote/contractCalls — Multi-step contract calls (BETA)

curl -s --request POST \
  --url https://li.quest/v1/quote/contractCalls \
  --header 'Content-Type: application/json' \
  --header "x-lifi-api-key: $LIFI_API_KEY" \
  --data '{
  "fromChain": 10,
  "fromToken": "0x4200000000000000000000000000000000000042",
  "fromAddress": "0xYOUR_ADDRESS",
  "toChain": 1,
  "toToken": "ETH",
  "toAmount": "100000000000001",
  "contractCalls": []
}'

GET /v1/status — Check transfer status

curl -s --request GET \
  --url 'https://li.quest/v1/status?txHash=0xYOUR_TX_HASH&fromChain=8453' \
  --header "x-lifi-api-key: $LIFI_API_KEY"

Pass fromChain to speed up the lookup.

GET /v1/tools — List available bridges and exchanges

curl -s --request GET \
  --url 'https://li.quest/v1/tools?chains=8453' \
  --header "x-lifi-api-key: $LIFI_API_KEY"

Docs

• LLM docs: https://docs.li.fi/llms.txt
• OpenAPI: https://gist.githubusercontent.com/kenny-io/7fede47200a757195000bfbe14c5baee/raw/725cf9d4a6920d5b930925b0412d766aa53c701c/lifi-openapi.yaml