---

name: okx-dex-swap description: "This skill should be used when the user asks to 'swap tokens', 'trade OKB for USDC', 'buy tokens', 'sell tokens', 'exchange crypto', 'convert tokens', 'swap SOL for USDC', 'get a swap quote', 'execute a trade', 'find the best swap route', 'cheapest way to swap', 'optimal swap', 'compare swap rates', or mentions swapping, trading, buying, selling, or exchanging tokens on XLayer, Solana, Ethereum, Base, BSC, Arbitrum, Polygon, or any of 20+ supported chains. Aggregates liquidity from 500+ DEX sources for optimal routing and price. Supports slippage control, price impact protection, and cross-DEX route optimization. Do NOT use for general programming questions about swap code, or for analytical questions about historical swap volume." license: Apache-2.0 metadata: author: okx version: "1.0.2" homepage: "https://web3.okx.com"

OKX DEX Aggregator CLI

5 commands for multi-chain swap aggregation — quote, approve, and execute.

Pre-flight Checks

Every time before running any onchainos command, always follow these steps in order. Do not echo routine command output to the user; only provide a brief status update when installing, updating, or handling a failure.

1. Confirm installed: Run which onchainos. If not found, install it:

   curl -sSL https://raw.githubusercontent.com/okx/onchainos-skills/main/install.sh | sh
   

   If the install script fails, ask the user to install manually following the instructions at: https://github.com/okx/onchainos-skills

2. Check for updates: Read ~/.onchainos/last_check and compare it with the current timestamp:

   cached_ts=$(cat ~/.onchainos/last_check 2>/dev/null || true)
   now=$(date +%s)
   

   • If cached_ts is non-empty and (now - cached_ts) < 43200 (12 hours), skip the update and proceed.
   • Otherwise (file missing or older than 12 hours), run the installer to check for updates:

     curl -sSL https://raw.githubusercontent.com/okx/onchainos-skills/main/install.sh | sh
     

     If a newer version is installed, tell the user and suggest updating their onchainos skills from https://github.com/okx/onchainos-skills to get the latest features.

3. If any onchainos command fails with an unexpected error during this session, try reinstalling before giving up:

   curl -sSL https://raw.githubusercontent.com/okx/onchainos-skills/main/install.sh | sh
   

4. Create a .env file in the project root to override the default API credentials (optional — skip this for quick start):

   OKX_API_KEY=          # or OKX_ACCESS_KEY
   OKX_SECRET_KEY=
   OKX_PASSPHRASE=
   

Skill Routing

• For token search → use okx-dex-token
• For market prices → use okx-dex-market
• For transaction broadcasting → use okx-onchain-gateway
• For wallet balances / portfolio → use okx-wallet-portfolio

Quickstart

EVM Swap (quote → approve → swap)

# 1. Quote — sell 100 USDC for OKB on XLayer
onchainos swap quote \
  --from 0x74b7f16337b8972027f6196a17a631ac6de26d22 \
  --to 0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee \
  --amount 100000000 \
  --chain xlayer
# → Expected: X.XX OKB, gas fee, price impact

# 2. Approve — ERC-20 tokens need approval before swap (skip for native OKB)
onchainos swap approve \
  --token 0x74b7f16337b8972027f6196a17a631ac6de26d22 \
  --amount 100000000 \
  --chain xlayer
# → Returns approval calldata: sign and broadcast via okx-onchain-gateway

# 3. Swap
onchainos swap swap \
  --from 0x74b7f16337b8972027f6196a17a631ac6de26d22 \
  --to 0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee \
  --amount 100000000 \
  --chain xlayer \
  --wallet 0xYourWallet \
  --slippage 1
# → Returns tx data: sign and broadcast via okx-onchain-gateway

Solana Swap

onchainos swap swap \
  --from 11111111111111111111111111111111 \
  --to DezXAZ8z7PnrnRJjz3wXBoRgixCa6xjnB7YaB1pPB263 \
  --amount 1000000000 \
  --chain solana \
  --wallet YourSolanaWallet \
  --slippage 1
# → Returns tx data: sign and broadcast via okx-onchain-gateway

Chain Name Support

The CLI accepts human-readable chain names and resolves them automatically.

Chain	Name	chainIndex
XLayer	xlayer	196
Solana	solana	501
Ethereum	ethereum	1
Base	base	8453
BSC	bsc	56
Arbitrum	arbitrum	42161

Native Token Addresses

CRITICAL: Each chain has a specific native token address. Using the wrong address will cause swap transactions to fail.

Chain	Native Token Address
EVM (Ethereum, BSC, Polygon, Arbitrum, Base, etc.)	0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Solana	11111111111111111111111111111111
Sui	0x2::sui::SUI
Tron	T9yD14Nj9j7xAB4dbGeiX9h8unkKHxuWwb
Ton	EQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAM9c

WARNING — Solana native SOL: The correct address is 11111111111111111111111111111111 (Solana system program). Do NOT use So11111111111111111111111111111111111111112 (wSOL SPL token) — it is a different token and will cause swap failures.

Command Index

#	Command	Description
1	onchainos swap chains	Get supported chains for DEX aggregator
2	onchainos swap liquidity --chain <chain>	Get available liquidity sources on a chain
3	onchainos swap approve --token ... --amount ... --chain ...	Get ERC-20 approval transaction data
4	onchainos swap quote --from ... --to ... --amount ... --chain ...	Get swap quote (read-only price estimate)
5	onchainos swap swap --from ... --to ... --amount ... --chain ... --wallet ...	Get swap transaction data

Cross-Skill Workflows

This skill is the execution endpoint of most user trading flows. It almost always needs input from other skills first.

Workflow A: Full Swap by Token Name (most common)

User: "Swap 1 SOL for BONK on Solana"

1. okx-dex-token    onchainos token search BONK --chains solana               → get BONK tokenContractAddress
       ↓ tokenContractAddress
2. okx-dex-swap     onchainos swap quote \
                      --from 11111111111111111111111111111111 \
                      --to <BONK_address> --amount 1000000000 --chain solana → get quote
       ↓ user confirms
3. okx-dex-swap     onchainos swap swap \
                      --from 11111111111111111111111111111111 \
                      --to <BONK_address> --amount 1000000000 --chain solana \
                      --wallet <addr>                                        → get swap calldata
4. User signs the transaction
5. okx-onchain-gateway  onchainos gateway broadcast --signed-tx <tx> --address <addr> --chain solana

Data handoff:

• tokenContractAddress from step 1 → --to in steps 2-3
• SOL native address = 11111111111111111111111111111111 → --from. Do NOT use wSOL address.
• Amount 1 SOL = 1000000000 (9 decimals) → --amount param

Workflow B: EVM Swap with Approval

User: "Swap 100 USDC for OKB on XLayer"

1. okx-dex-token    onchainos token search USDC --chains xlayer               → get USDC address
2. okx-dex-swap     onchainos swap quote --from <USDC> --to 0xeeee...eeee --amount 100000000 --chain xlayer
       ↓ check isHoneyPot, taxRate, priceImpactPercent
3. okx-dex-swap     onchainos swap approve --token <USDC> --amount 100000000 --chain xlayer
4. User signs the approval transaction
5. okx-onchain-gateway  onchainos gateway broadcast --signed-tx <tx> --address <addr> --chain xlayer
6. okx-dex-swap     onchainos swap swap --from <USDC> --to 0xeeee...eeee --amount 100000000 --chain xlayer --wallet <addr>
7. User signs the swap transaction
8. okx-onchain-gateway  onchainos gateway broadcast --signed-tx <tx> --address <addr> --chain xlayer

Key: EVM tokens (not native OKB) require an approve step. Skip it if user is selling native tokens.

Workflow C: Compare Quote Then Execute

1. onchainos swap quote --from ... --to ... --amount ... --chain ...  → get quote with route info
2. Display to user: expected output, gas, price impact, route
3. If price impact > 5% → warn user
4. If isHoneyPot = true → block trade, warn user
5. User confirms → proceed to approve (if EVM) → swap

Swap Flow

EVM Chains (XLayer, Ethereum, BSC, Base, etc.)

1. onchainos swap quote ...              → Get price and route
2. onchainos swap approve ...            → Get approval calldata (skip for native tokens)
3. User signs the approval transaction
4. onchainos gateway broadcast ...       → Broadcast approval tx
5. onchainos swap swap ...               → Get swap calldata
6. User signs the swap transaction
7. onchainos gateway broadcast ...       → Broadcast swap tx

Solana

1. onchainos swap quote ...              → Get price and route
2. onchainos swap swap ...               → Get swap calldata
3. User signs the transaction
4. onchainos gateway broadcast ...       → Broadcast tx

Operation Flow

Step 1: Identify Intent

• View a quote → onchainos swap quote
• Execute a swap → full swap flow (quote → approve → swap)
• List available DEXes → onchainos swap liquidity
• Approve a token → onchainos swap approve

Step 2: Collect Parameters

• Missing chain → recommend XLayer (--chain xlayer, low gas, fast confirmation) as the default, then ask which chain the user prefers
• Missing token addresses → use okx-dex-token onchainos token search to resolve name → address
• Missing amount → ask user, remind to convert to minimal units
• Missing slippage → suggest 1% default, 3-5% for volatile tokens
• Missing wallet address → ask user

Step 3: Execute

• Quote phase: call onchainos swap quote, display estimated results
  • Expected output, gas estimate, price impact, routing path
  • Check isHoneyPot and taxRate — surface safety info to users
• Confirmation phase: wait for user approval before proceeding
• Approval phase (EVM only): check/execute approve if selling non-native token
• Execution phase: call onchainos swap swap, return tx data for signing

Step 4: Suggest Next Steps

After displaying results, suggest 2-3 relevant follow-up actions:

Just completed	Suggest
swap quote (not yet confirmed)	1. View price chart before deciding → okx-dex-market 2. Proceed with swap → continue approve + swap (this skill)
Swap executed successfully	1. Check price of the token just received → okx-dex-market 2. Swap another token → new swap flow (this skill)
swap liquidity	1. Get a swap quote → onchainos swap quote (this skill)

Present conversationally, e.g.: "Swap complete! Would you like to check your updated balance?" — never expose skill names or endpoint paths to the user.

CLI Command Reference

1. onchainos swap chains

Get supported chains for DEX aggregator. No parameters required.

onchainos swap chains

Return fields:

Field	Type	Description
chainIndex	String	Chain identifier (e.g., "1", "501")
chainName	String	Human-readable chain name
dexTokenApproveAddress	String	DEX router address for token approvals on this chain

2. onchainos swap liquidity

Get available liquidity sources on a chain.

onchainos swap liquidity --chain <chain>

Param	Required	Default	Description
--chain	Yes	-	Chain name (e.g., ethereum, solana, xlayer)

Return fields:

Field	Type	Description
id	String	Liquidity source ID
name	String	Liquidity source name (e.g., "Uniswap V3", "CurveNG")
logo	String	Liquidity source logo URL

3. onchainos swap approve

Get ERC-20 approval transaction data.

onchainos swap approve --token <address> --amount <amount> --chain <chain>

Param	Required	Default	Description
--token	Yes	-	Token contract address to approve
--amount	Yes	-	Amount in minimal units
--chain	Yes	-	Chain name

Return fields:

Field	Type	Description
data	String	Approval calldata (hex) — use as tx data field
dexContractAddress	String	Spender address (already encoded in data). NOT the tx to — send tx to the token contract
gasLimit	String	Estimated gas limit for the approval tx
gasPrice	String	Recommended gas price

4. onchainos swap quote

Get swap quote (read-only price estimate).

onchainos swap quote --from <address> --to <address> --amount <amount> --chain <chain> [--swap-mode <mode>]

Param	Required	Default	Description
--from	Yes	-	Source token contract address
--to	Yes	-	Destination token contract address
--amount	Yes	-	Amount in minimal units (sell amount if exactIn, buy amount if exactOut)
--chain	Yes	-	Chain name
--swap-mode	No	exactIn	exactIn or exactOut

Return fields:

Field	Type	Description
toTokenAmount	String	Expected output amount in minimal units
fromTokenAmount	String	Input amount in minimal units
estimateGasFee	String	Estimated gas fee (native token units)
tradeFee	String	Trade fee estimate in USD
priceImpactPercent	String	Price impact as percentage (e.g., "0.05")
router	String	Router type used
dexRouterList[]	Array	DEX routing path details
dexRouterList[].dexName	String	DEX name in the route
dexRouterList[].percentage	String	Percentage of amount routed through this DEX
fromToken.isHoneyPot	Boolean	true = source token is a honeypot (cannot sell)
fromToken.taxRate	String	Source token buy/sell tax rate
fromToken.decimal	String	Source token decimals
fromToken.tokenUnitPrice	String	Source token unit price in USD
toToken.isHoneyPot	Boolean	true = destination token is a honeypot (cannot sell)
toToken.taxRate	String	Destination token buy/sell tax rate
toToken.decimal	String	Destination token decimals
toToken.tokenUnitPrice	String	Destination token unit price in USD

5. onchainos swap swap

Get swap transaction data (quote → sign → broadcast).

onchainos swap swap --from <address> --to <address> --amount <amount> --chain <chain> --wallet <address> [--slippage <pct>] [--swap-mode <mode>]

Param	Required	Default	Description
--from	Yes	-	Source token contract address
--to	Yes	-	Destination token contract address
--amount	Yes	-	Amount in minimal units
--chain	Yes	-	Chain name
--wallet	Yes	-	User's wallet address
--slippage	No	"1"	Slippage tolerance in percent (e.g., "1" for 1%)
--swap-mode	No	"exactIn"	exactIn or exactOut

Return fields:

Field	Type	Description
routerResult	Object	Same structure as quote return (see swap quote above)
tx.from	String	Sender address
tx.to	String	Contract address to send the transaction to
tx.data	String	Transaction calldata (hex for EVM, base58 for Solana)
tx.gas	String	Gas limit for the transaction
tx.gasPrice	String	Gas price
tx.value	String	Native token value to send (in minimal units)
tx.minReceiveAmount	String	Minimum receive amount after slippage (minimal units)
tx.maxSpendAmount	String	Maximum spend amount (for exactOut mode)
tx.slippagePercent	String	Applied slippage tolerance percentage

Input / Output Examples

User says: "Swap 100 USDC for OKB on XLayer"

# 1. Quote
onchainos swap quote --from 0x74b7f16337b8972027f6196a17a631ac6de26d22 --to 0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee --amount 100000000 --chain xlayer
# → Expected output: 3.2 OKB, Gas fee: ~$0.001, Price impact: 0.05%

# 2. Approve (ERC-20 token needs approval)
onchainos swap approve --token 0x74b7f16337b8972027f6196a17a631ac6de26d22 --amount 100000000 --chain xlayer
# → Returns approval calldata → user signs → broadcast

# 3. Swap
onchainos swap swap --from 0x74b7f16337b8972027f6196a17a631ac6de26d22 --to 0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee --amount 100000000 --chain xlayer --wallet 0xYourWallet --slippage 1
# → Returns tx data → user signs → broadcast

User says: "What DEXes are available on XLayer?"

onchainos swap liquidity --chain xlayer
# → Display: CurveNG, XLayer DEX, ... (DEX sources on XLayer)

Edge Cases

• High slippage (>5%): warn user, suggest splitting the trade or adjusting slippage
• Large price impact (>10%): strongly warn, suggest reducing amount
• Honeypot token: isHoneyPot = true — block trade and warn user
• Tax token: taxRate non-zero — display to user (e.g. 5% buy tax)
• Insufficient balance: check balance first, show current balance, suggest adjusting amount
• exactOut not supported: only Ethereum/Base/BSC/Arbitrum — prompt user to use exactIn
• Solana native SOL address: Must use 11111111111111111111111111111111 (system program), NOT So11111111111111111111111111111111111111112 (wSOL)
• Network error: retry once, then prompt user to try again later
• Region restriction (error code 50125 or 80001): do NOT show the raw error code to the user. Instead, display a friendly message: ⚠️ Service is not available in your region. Please switch to a supported region and try again.
• Native token approve (always skip): NEVER call onchainos swap approve for native token addresses (0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee on EVM, 11111111111111111111111111111111 on Solana). Native tokens do not use ERC-20 approval; calling approve with a native token address may return calldata that will revert on-chain and waste gas. Before calling approve, check: if --token (i.e. the --from token) is a native token address, skip this step entirely.

Amount Display Rules

• Input/output amounts in UI units (1.5 ETH, 3,200 USDC)
• Internal CLI params use minimal units (1 USDC = "1000000", 1 ETH = "1000000000000000000")
• Gas fees in USD
• minReceiveAmount in both UI units and USD
• Price impact as percentage

Global Notes

• Amounts must be in minimal units (wei/lamports)
• exactOut only on Ethereum(1)/Base(8453)/BSC(56)/Arbitrum(42161)
• Check isHoneyPot and taxRate — surface safety info to users
• EVM contract addresses must be all lowercase
• The CLI resolves chain names automatically (e.g., ethereum → 1, solana → 501)
• The CLI handles authentication internally via environment variables — see Prerequisites step 4 for default values