What Is 1inch and How Do You Use It?

1inch is a decentralised exchange (DEX) aggregator: it searches swap routes across DeFi exchanges and presents an option for trading one token for another. It supports routes across 18+ networks, but the networks and tokens available to you depend on the service’s current support and the liquidity behind each trade.

Instead of using a single exchange pool, an aggregator can compare or combine liquidity from different venues. That may improve the amount you receive or help find a route when one pool cannot handle the full trade. It does not create liquidity or guarantee the best result: the quote depends on market conditions, route availability, fees and the transaction executing as expected.

You interact with 1inch using a self-custody wallet. The swap is carried out on a blockchain, and your wallet asks you to approve relevant actions. 1inch is not the same as a centralised exchange: you control the wallet, and you are responsible for network fees, approvals and safeguarding your recovery phrase. You do not need to buy 1INCH just to make a typical token swap; you do need the assets and network fee token required for your chosen trade.

Before connecting, decide which network you intend to use and check that your wallet is set to that same network. A token with the same name or ticker can exist on different chains, and sending it to the wrong address or choosing the wrong network can make it difficult or impossible to recover.

Prepare the asset you want to trade, the receiving token, and enough of the network’s native token to cover gas. Gas is paid to process the blockchain transaction, not necessarily to 1inch; the amount varies with network and congestion. Make sure you are using the genuine 1inch app or interface through a trusted route. Fake sites and impersonator tokens are common crypto risks.

Use this pre-trade checklist:

• Confirm your wallet address and selected network.
• Check that the token contract matches the asset you intend to trade.
• Keep enough native network currency for gas, including a possible second transaction for approval.
• Consider a small test swap first if the token or route is unfamiliar.
• Never enter your recovery phrase into a website or share it with anyone.

If you cannot confidently identify the network, token or approval request, stop rather than signing and investigating afterward.

The exact screen layout can change, but the basic process is similar to other wallet-based swaps:

1. Open the 1inch interface you have independently verified and connect your wallet. Check the wallet’s connection request and confirm that it is for the account you intend to use.
2. Select the network, the token you are selling and the token you want to receive. Verify both token names and, for less familiar assets, their contract addresses.
3. Enter the amount. Review the estimated output, route, price impact, minimum received and any displayed fees or warnings. Compare the quote with another reputable route if the trade is large or the result looks unusual.
4. If prompted, approve the selling token. Read the wallet request before confirming; approval is separate from the swap itself.
5. Review the swap transaction in your wallet, including the network and gas estimate, then sign only if the details match your intention.
6. Wait for the transaction to complete and check the resulting token balance and transaction status.

A quote is an estimate, not a completed trade. The market can move between quote and execution, and a transaction may fail if its conditions are no longer met. Do not repeat a transaction just because the page appears slow; first check your wallet and the network status.

A swap can involve several costs, and the total is not always obvious from the token price alone. Check the final quote and wallet confirmation before signing. 1inch aggregates routes, but the route may pass through one or more exchanges or pools, each with its own market conditions and possible charges.

Cost	What to check
Network gas	The wallet’s estimate for processing the transaction; it can change with congestion.
Pool or exchange charges	Any trading fees reflected in the route or quote.
Price impact	How much your trade may move the price in the available liquidity.
Slippage	The difference that may arise between the quoted and executed price.
Approval transaction	A separate on-chain action may require its own gas.

The value shown as “you receive” is an estimate. Check the minimum amount the transaction allows you to receive, if displayed, and understand that a stricter slippage setting can cause a swap to fail if the market moves too far. A more permissive setting can let the trade execute at a less favourable price. 1inch’s fee and security disclosures are limited, so rely on the specific transaction details shown to you rather than assuming every route has the same cost.

A token approval is permission for a smart contract to spend a token from your wallet. It is not the swap itself. Your wallet may ask you to approve before it can submit the trade, and the approval can require a separate blockchain transaction and gas.

Before approving, check:

• Which token is being approved.
• Which contract or spender receives permission.
• Whether the allowance is limited to the trade amount or set more broadly.
• Which network the approval uses.
• Whether the wallet’s request is consistent with the swap you selected.

Do not sign an approval you do not understand. An unlimited allowance can be convenient for future trades, but it also gives the approved contract permission to use more of that token than the immediate swap requires. If your wallet supports a smaller allowance and you prefer to limit exposure, consider approving only what you need. You can also review and revoke unused approvals using a reputable wallet or security tool, but revoking is itself an on-chain transaction and may cost gas.

Keep your recovery phrase private. A legitimate swap does not require you to disclose it. If a site, message or support account asks for your phrase or private key, leave and do not proceed.

After signing, use your wallet’s activity view to see whether the transaction is pending, confirmed or failed. If it is pending, avoid sending the same swap again until you understand the status; otherwise you could end up with duplicate trades. You can use the transaction hash in the relevant network’s block explorer to check whether it was processed.

If the swap completes, confirm that the receiving token appears in your wallet on the correct network. Some wallets do not display every token automatically, so verify the token contract rather than assuming that a missing display means the swap failed. Never trust a message claiming that you must pay an extra fee to “release” funds or provide your recovery phrase to fix a transaction.

If a transaction fails, inspect the wallet or explorer status and the error message. A failed transaction may still use gas. Check whether the issue was an insufficient gas balance, a stale quote, token restrictions or a network problem before trying again. If the transaction is still pending, follow your wallet’s normal guidance for that network rather than signing instructions from an unsolicited helper. Keep the transaction hash and error details for your own records, but do not share private wallet credentials.

A quote aggregator can help you compare routes, but it cannot remove the risks of DeFi. Smart contracts may contain vulnerabilities, a token may be malicious or difficult to sell, and a pool can have too little liquidity for the trade you want. A quoted route can also change before it executes. You remain responsible for the wallet and every transaction you sign.

Treat unfamiliar tokens with particular care. A token name and logo are not proof of authenticity; check the contract address and network against a reliable project source. Be cautious if a quoted return or price looks implausibly favourable, or if a swap requires an unexpected approval or network change. Do not use money you cannot afford to lose, and remember that a completed blockchain transaction is usually difficult or impossible to reverse.

1inch’s security disclosures are limited. That does not by itself establish that the service is unsafe, but it means you should not assume that an aggregator quote is a security guarantee. Consider the amount at risk, review the transaction and approval details, and keep your wallet software and device secure. For a large trade, compare routes and consider splitting the transaction only after accounting for the extra gas and execution risk.

Avoiding a few common errors can prevent expensive or irreversible mistakes:

• Choosing the wrong network: Match the wallet network to the token and route shown in the swap. Do not assume a familiar ticker means the asset is on the right chain.
• Skipping the final quote review: Check estimated output, minimum received, route and gas immediately before signing.
• Confusing an approval with a swap: Approval grants spending permission; it does not complete the trade. Read each wallet request separately.
• Ignoring gas: Keep enough native network currency for both an approval, if needed, and the swap.
• Trusting token names alone: Verify contract addresses for unfamiliar assets and be wary of impersonators.
• Resubmitting a pending trade: Check its status before trying again to avoid an unintended second swap.
• Sharing wallet secrets: Never reveal a recovery phrase or private key, even to someone claiming to be support.

1inch may suit you if you want to compare decentralised swap routes from a self-custody wallet and are comfortable checking on-chain details. If you prefer a single exchange’s liquidity and interface, you could compare it with Uniswap. If you want swaps inside a wallet app, MetaMask Swap is another option. In every case, compare the actual quote, costs, approvals and network before you sign.