01 · How it works
From one token on one network to another token on another
Jumper is the interface; the route finding is done by LI.FI, the protocol behind it. To the user it looks like an ordinary swap, even though two or three transactions on different networks may happen in the background.
Pick what and where
E.g. ETH on Ethereum to USDC on Solana. The amount and the recipient address are all you enter.
LI.FI finds routes
It asks bridges, DEXs and solvers for quotes and compares them by amount received, speed and gas cost.
Sign in your wallet
You approve the token and send one transaction on the source network. Contracts and the bridge execute the rest of the route.
Tracked to the end
Jumper tracks the transfer across networks. If a step gets stuck, LI.FI can switch to a fallback route or refund you.
Example route
What happens when you send ETH on Ethereum to USDC on Arbitrum
An illustration, not a real quote. The route changes with liquidity: sometimes it is cheaper to bridge ETH first and swap on the destination, and sometimes a single solver handles the whole transfer.
02 · Networks
Networks Jumper supports
Most are EVM networks (Ethereum, its L2s and compatible L1s), plus Solana, Bitcoin and Sui, which run on different technology.
03 · Bridges
Bridges LI.FI builds routes from
Jumper has no bridge of its own. Every transfer goes through one of these protocols, and which one is picked depends on the networks, the token and the amount.
| Bridge | LI.FI key | Networks |
|---|
Terms
What is what
Bridge
A protocol that moves value from one network to another: it locks or burns the token on the source and releases or mints it on the destination, or pays out from its own liquidity.
Aggregator
Moves nothing itself, but compares quotes from several bridges and DEXs. Jumper and LI.FI are aggregators.
Solver / intent
You state an intent (what you want to receive), and a solver pays you on the destination from its own funds and settles on the source later. Usually the fastest.
Slippage
The allowed deviation from the quoted amount while the transaction executes. Too high a slippage leaves room for a worse price.
Approve
Permission for a contract to spend your token. Better to approve the exact amount than an unlimited one.
Native vs bridged token
Native USDC is issued by Circle directly on the network. A bridged version is a bridge's wrapped token and carries that bridge's risk.
04 · Fees
What a transfer costs
The total cost has three parts, and before you sign Jumper shows the sum and the amount that arrives.
| Cost item | Charged by | Note |
|---|---|---|
| Gas on the source network | Network validators | On Ethereum the biggest cost for small amounts; cents on L2s. |
| Bridge or DEX fee | The protocol executing the route | Included in the quote; shows as the difference between sent and received. |
| Jumper fee | Jumper | A small percentage of the amount. DefiLlama records $7.38m in fees in total, $22,435 in the last 24 hours. |
For small amounts from Ethereum, gas often costs more than the fee itself. It pays to send larger amounts at once or to start from an L2.
05 · Risks
What to watch out for
- Smart contracts: funds pass through LI.FI contracts and the bridge contract, so a bug in any of them can cause a loss. LI.FI has every contract independently audited and offers a bounty of up to $1,000,000 for reporting a critical vulnerability.
- Unlimited approvals: in July 2024 an attacker used a vulnerable function in a LI.FI contract to pull about $10m from wallets that had given the contract unlimited approval. (from general knowledge) Approve the exact amount and revoke old approvals from time to time.
- Bridge risk: if a bridge is hacked or halts, bridged tokens can lose value. Native tokens (e.g. USDC via Circle CCTP) do not carry that risk.
- Fake sites: Jumper moved from jumper.exchange to jumper.xyz. Type the address yourself and never sign anything from links in messages or ads.
- Stuck transfers: a cross-network transfer can take from a few seconds to a few hours. Its status is tracked by transaction hash, and funds are not lost once the source transaction has gone through.
Sources
jumper.xyz · LI.FI docs · LI.FI API: networks · LI.FI API: bridges and DEXs · LI.FI security and audits · DefiLlama: Jumper fees
Network and bridge counts load live from the LI.FI API when it is available; otherwise the 8 Oct 2026 snapshot is shown.