FAQ

Last updated: Feb 24, 2026

Contacting support

If you need help, open a support ticket through the chat widget on this page (bottom right).

When contacting support, please include:

Your wallet address
The network you are using (Ethereum Mainnet)
A clear description of the issue

Platform basics

What is Synthetix?

Synthetix is a decentralised perpetuals exchange on Ethereum Mainnet. It lets you trade leveraged long and short positions on a range of assets without giving up custody of your funds.

Do I need to create an account?

No sign-up required. Connect your wallet and create a trading subaccount directly in the app. See Getting Started.

Do I need KYC?

No. Synthetix does not require identity verification.

Who controls my funds?

You do. Funds are held in smart contracts — Synthetix does not have custody of your assets.

Can Synthetix freeze my funds?

No. Accounts cannot be frozen or modified by any single party. Rules are enforced by smart contracts.

Wallet & access

Can I use multiple wallets?

Yes. Each wallet can have its own set of subaccounts.

I connected the wrong wallet — can I switch?

Yes. Disconnect and reconnect the correct wallet from the wallet selector.

What happens if I lose my wallet?

Your funds are secured by your wallet's seed phrase. Synthetix has no ability to recover access on your behalf. Store your seed phrase securely.

Tokens & assets

What collateral can I use?

USDT on Ethereum Mainnet is the primary collateral for trading.

What tokens do I need?

USDT — for trading collateral
ETH — for gas fees on Ethereum Mainnet
SNX — for staking
sUSD — for staking and ecosystem liquidity products

Why do I see unknown tokens in my wallet?

Unknown tokens may be airdropped spam tokens. Do not interact with them. Synthetix does not airdrop tokens without official announcement.

Technical issues

My wallet won't connect

Ensure your wallet is set to Ethereum Mainnet
Try refreshing the page or clearing your browser cache
Try a different browser or disable browser extensions
Use the chat widget to contact support if the issue persists

Wrong network error

Switch your wallet to Ethereum Mainnet and refresh the page.

Transaction stuck pending

You may need to speed up or cancel the transaction from your wallet. In MetaMask, go to Settings → Advanced → Reset Account if a nonce is stuck.

Transaction failed but gas was used

A failed transaction still consumes gas. This usually means a contract condition was not met at execution time (e.g. price moved, OI limit reached). Check the error message in your wallet or block explorer.

Balance not updating

Wait for the transaction to confirm on Ethereum Mainnet (typically 12–15 seconds). If it still doesn't update, refresh the page.

Position not appearing

Confirm your transaction was successful on a block explorer. If confirmed but the position isn't showing, try switching subaccounts or refreshing.

Trading

What is the maximum leverage?

Maximum leverage varies by market and position size. Leverage limits decrease as notional position size increases. Check the market detail panel in the app for current limits.

What is the difference between mark price and last price?

The mark price is used for margin calculations, PnL, and liquidations — it's derived from external perp markets to resist manipulation. The last price is the current fair value of the Synthetix perpetual, used for UI display. See Pricing.

What is funding?

A periodic payment between longs and shorts that keeps the perpetual price anchored to the underlying index. See Funding.

What happens if I get liquidated?

Your positions are closed at the mark price. A liquidation fee is deducted and any remaining collateral is returned to your account. See Liquidations.

API

Do you have an API?

Yes — REST and WebSocket APIs are available. See API Overview.

How do I authenticate API requests?

Synthetix uses EIP-712 signatures. See Authentication.