Answer · Developers

How to swap crypto with an API

This guide covers how to swap crypto with an api step by step using XAUConnect. You keep custody of your wallet keys throughout; the platform aggregates quotes and builds transactions for you to approve.

XAUConnect does not require account registration to obtain quotes — connect a wallet only when you are ready to trade.

Before you start

Decentralized swaps settle against on-chain pools, not a centralized order book. Prices move every block as other traders execute, which is why quotes expire and should be refreshed before signing. Pick the network where your tokens already live before quoting. Moving assets between chains requires a separate bridge flow.

Step-by-step

1. Select network and tokens in the swap widget 2. Connect a compatible wallet 3. Enter amount and wait for quotes to refresh 4. Compare routes by minimum received 5. Set slippage appropriate to pool depth 6. Approve token spending once if required 7. Confirm the swap and verify receipt on the explorer If quotes fail, reduce size slightly, nudge slippage up incrementally, or retry after network congestion eases.

Using XAUConnect

XAUConnect supports spot swaps and cross-chain routes with wallet-signed execution. Quotes refresh as pool reserves change — if you wait more than a minute between preview and signature, request a fresh quote. Switch networks from the chain selector without leaving the app. Each network uses its own gas token and block explorer.

Execution pitfalls

Copying token addresses from social media without verifying every character on the explorer. When in doubt, run a small test trade before committing size.

Security habits every trader should follow

Verify token contract addresses on the official block explorer — never copy addresses from social media without checking every character. Phishing sites often change one hex digit. Revoke token approvals you no longer need, especially unlimited ERC-20 allowances. Never share seed phrases or sign transactions you do not understand. Bookmark the official XAUConnect domain and confirm the URL bar before connecting a wallet.

After you confirm a swap

Open your wallet's transaction history or the relevant block explorer to confirm the output amount matches the quote's minimum received. Discrepancies usually mean slippage exceeded tolerance or the pool moved during confirmation. XAUConnect does not produce tax reports — export history from your wallet or explorer for accounting if needed.

Fees, slippage, and price impact

Three separate costs affect every swap: the platform or routing fee (shown in the quote card), network gas paid to validators, and price impact from moving the pool curve with your trade size. Slippage tolerance tells the contract how far the price may move while your transaction confirms. Start conservatively on unfamiliar pairs — widening slippage invites worse fills on public mempools. Gas varies widely by network — Ethereum mainnet costs more than most L2s, while Solana uses priority fees during congested periods.

Legal

Risk disclosure

XAUConnect is a non-custodial swap aggregator. Digital assets are volatile and may lose value rapidly. Content on this page is educational and not investment advice. Verify every contract address on the official block explorer before approving a transaction.

Frequently asked questions

How do I how to swap crypto with an api?

Yes. Connect your wallet, enter tokens and amount, pick a route, and confirm. Fees and minimum received are shown before you sign. Re-quote if more than a minute passes before you sign; pool prices move continuously.

Do I need an account or KYC?

No. Connect a wallet only when you want to execute a swap. Start with a small test amount when trying a new token or route for the first time.

Which networks are supported?

Ethereum, BNB Chain, Polygon, Arbitrum, Base, Avalanche, and Solana. Compare at least two routes when the trade size is meaningful.

Is this financial advice?

No. This is educational content about decentralized trading mechanics. XAUConnect never holds your funds — each step requires a wallet signature.

Live execution

Trade on XAUConnect

Open the swap page to compare live routes, set slippage, and sign from your own wallet — fully non-custodial.

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