Welcome to Across
Across is the fastest, cheapest, most secure and decentralized way to bridge and execute transactions crosschain ⛺
Across is an interoperability protocol powered by intents. It is the first crosschain intents protocol in production today, enabling the fastest and lowest-cost way to transfer value with better security tradeoffs vs. traditional bridge designs.
Across is the perfect place for users to bridge funds cheaply, quickly and securely developers to build production-ready crosschain apps quickly.
Quickstart
Pick your learning path and learn how Across allows you to ship crosschain apps in the fastest and easiest way possible.
Integrate Across
Across can be easily integrated via our easy to use REST API into any application requiring instant, low cost crosschain value transfer. Let users easily onboard assets without leaving your app.
Start with the Bridge Integration Guide and progress to learn how you can make multichain and single chain experiences
Bridge Integration Guide
Use Across APIs to request quotes and bridge funds instantly
Across SDK
Integrate crosschain bridging into your app quickly
Across APIs
Leverage Across APIs to securely interface with the protocol
Embedded Crosschain Actions
Build seamless staking, minting and more functionalities where bridging is abstracted away with Across
Concepts
Learn how embedded cross-chain actions work
Generic Multicaller Handler
Use our already-deployed and audited contract
Custom Multicaller Handler
build your own custom handler contract
Learn How Across Works
Deep-dive into Across and learn about the various actors that help build the fastest, most secure, low-cost and decentralized intent-based interoperable protocol.
Crosschain Intents
An intent is a type of order where a user specifies an outcome instead of an execution path
Intent Lifecycle
These steps are intended to fit into almost any system that requires crosschain transfers
ERC-7683 in Production
Explore how Across implements ERC-7683 by using AcrossOriginSettler contract
Relayers
Join the growing network of independent relayers. Earn up to 100% APY.
Running a Relayer
Technical instructions to follow and run your own Across V3 relayer
Relayer Nomination
A time-limited period of exclusivity to fill a given deposit for a relayer
Contracts and Chains
Across supports a large number of chains and the list is evergrowing as expand support and onboard ecosystems. You can learn all about the mainnet and testnet supported chains here
You can also find all the contract addresses for all the chains (mainnet and testnet) that Across supports here.
Developer and Community Support
We request all developers building on Across to join our discord server and gain instant help on any issues they face while integrating Across to their apps.
You can find more developer support resources here
The security of our protocol is extremely crucial. If you notice any bugs in the protocol, please report them here. You can also find details of our audits here.
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