SkyBridge
What is SkyBridge?
SkyBridge is a fast, secure way to move any token - ERC-20 or NFT - across 11 blockchain networks using Chainlink CCIP, Circle CCTP, the OP Standard Bridge, or Arbitrum's canonical Delayed Inbox.
Supported chains: Ethereum · Polygon · Base · Arbitrum One · Optimism · Avalanche C-Chain · BNB Chain · Unichain · Soneium · Ink · MegaETH
No wrapping headaches, no separate relayer wallets. You pay a small flat fee in native currency, and the bridge handles the rest.
Four ways to bridge
Chainlink CCIP - recommended
CCIP is the primary rail and the best choice for most transfers. It supports any ERC-20 or NFT and connects all 11 chains as a full mesh. WETH bridges natively over CCIP on the Ethereum ↔ Base / Arbitrum / Optimism lanes.
- Works on all 11 chains
- Any custom ERC-20 or NFT
- WETH on Eth ↔ Base / Arb / OP
Circle CCTP - native USDC
CCTP moves native USDC (not a wrapped version) across the 8 Circle-supported chains: Ethereum, Base, Optimism, Arbitrum, Polygon, Avalanche, Unichain, and Ink. Select "Fast" at checkout to pay a 0.25% fee and get your USDC in one step.
OP Standard Bridge - L2 fast path
The OP Standard Bridge is an optional, lower-latency path for transfers between Ethereum and the five OP-stack L2s: Base, Optimism, Unichain, Soneium, and Ink. It handles ETH, WETH, and listed ERC-20s. Deposits land in minutes; withdrawals back to Ethereum are subject to the OP Stack's ~7-day finalization window.
Arbitrum Canonical - native ETH deposits
For native ETH into Arbitrum One or Robinhood Chain, SkyBridge deposits through each chain's canonical Delayed Inbox using Arbitrum's retryable-ticket mechanism - the same path Arbitrum's own bridge uses. No CCIP fee, no wrapping. Deposits only (Ethereum → L2); arrives in ~10-15 minutes.
See Bridge Arbitrum ETH for the walkthrough and Architecture for a deeper look at how the four rails work.
Supported networks
| Chain | CCIP | CCTP | OP Standard |
|---|---|---|---|
| Ethereum | ✓ | ✓ | - |
| Polygon | ✓ | ✓ | - |
| Base | ✓ | ✓ | ✓ |
| Arbitrum One | ✓ | ✓ | - |
| Optimism | ✓ | ✓ | ✓ |
| Avalanche C-Chain | ✓ | ✓ | - |
| BNB Chain | ✓ | - | - |
| Unichain | ✓ | ✓ | ✓ |
| Soneium | ✓ | - | ✓ |
| Ink | ✓ | ✓ | ✓ |
| MegaETH | ✓ | - | - |
Full chain details and contract addresses → Chains.
Fees
A flat fee in native currency covers your transfer at the EntryPoint contract:
| Chain group | Flat fee |
|---|---|
| ETH-family (ETH / Base / Arb / OP / Unichain / Soneium / Ink / MegaETH) | 0.0001 ETH |
| Polygon | 2 POL |
| Avalanche C-Chain | 0.02 AVAX |
| BNB Chain | 0.0003 BNB |
CCTP Fast adds a 0.25% fee on the USDC amount. Full details → Fees.
Explore
🏗️ Architecture
How SkyBridge routes transfers across four rails and eleven-plus chains.
🌐 Chains
Every chain SkyBridge V2 supports, which rails are active, and contract addresses.
💸 Fees
SkyBridge V2 fee schedule - flat native fees and CCTP Fast percentage.
🗃️ User Guides
5 items
🗃️ CCIP
1 item
🗃️ Technical Reference
4 items
🗃️ SkyBridge V1 (Legacy)
5 items