Connecting the Multichain Ecosystem.

Relay — Blockchain Interoperability, DEX Aggregators & Web3 APIs

The interoperability protocol powering cross-chain interoperability, smart routing, blockchain API access, and multichain wallet infrastructure across 85+ chains.

Start Swapping on Relay

Technology Connecting Web3

Blockchain Interoperability

Relay is an interoperability protocol for interoperable blockchains — enabling blockchain communication, cross-chain messaging, and digital asset transfers across a live multichain ecosystem.

DEX Aggregator Routing

Find better rates with a decentralized exchange aggregator approach — liquidity aggregator design, smart routing, and crypto routing for low slippage swaps across multichain liquidity.

Blockchain API & SDK

The Relay API is a crypto API / cross-chain API / bridge API for blockchain developers — web3 development, wallet integration, and multichain API tooling in one stack.

Multichain Wallet Ready

Wallet infrastructure for multichain wallet and smart wallet products — wallet interoperability, non-custodial wallet UX, and cross-chain wallets that manage digital assets without chain friction.

Multichain Infrastructure That Ships

Blockchain interoperability across Relay multichain ecosystem

Cross-Chain Interoperability

Connect blockchain networks with blockchain connectivity built for production. Relay enables digital asset transfers and blockchain communication so the multichain ecosystem feels like one network.

Best DEX aggregator style smart routing on Relay

Best-Rate Swaps

Swap aggregation and token swaps powered by smart routing across multichain liquidity for better blockchain trading fills.

Relay API blockchain SDK for developers

Developer Tools

A blockchain SDK and web3 API so blockchain developers ship wallet integration without custom bridge stacks.

Multichain wallet infrastructure and self-custody

Wallets Users Trust

Power crypto wallet and blockchain wallets experiences with self-custody, wallet security, and digital asset management that works across chains — the same rails behind major wallet products.

Why Build on Relay

Payments-grade multichain infrastructure for the next generation of Web3 applications.

85+ Chains

Broad blockchain connectivity across the multichain ecosystem.

Smart Routing

Crypto routing that targets better execution and low slippage swaps.

Relay API

A production web3 API for bridge, swap, and wallet integration.

$20B+ Settled

Proven scale for digital asset transfers and multichain infrastructure.

Learn Relay

What Is Blockchain Interoperability?

Understand the technology connecting Web3 — interoperability protocols, multichain ecosystems, and cross-chain interoperability.

How DEX Aggregators Find Best Rates

Compare DEX aggregator and liquidity aggregator design — smart routing, crypto routing, and low slippage swaps.

Blockchain APIs Powering Web3 Apps

How blockchain API, crypto API, cross-chain API, and Relay API tooling accelerate web3 development.

Benefits of Multichain Wallets

Why multichain wallet and smart wallet infrastructure matter for modern digital asset management.

Guides & Articles

Browse Relay interoperability & API guides

Documentation

Relay Docs

Launch App

Open Relay

Ready to Connect the Multichain Ecosystem?

Build with Relay's interoperability protocol, DEX aggregator-grade routing, and blockchain API — or start swapping across 85+ chains today.

Start Swapping on Relay

cookie policy, privacy policy, disclaimer, terms & conditions
© Relay 2026 — Blockchain interoperability, aggregators & APIs for Web3.