App Kits supported blockchains and tokens

Supported blockchains

The App Kit SDK supports the following capabilities and wallet adapters for each supported blockchain.

Swap is available on mainnet only, with the exception of Arc testnet.

Blockchain	Capabilities	Adapters
Arbitrum	Send, Bridge, Swap, Unified Balance	Viem, Ethers, Circle Wallets
Arc	Send, Bridge, Swap, Unified Balance, Onramp, Earn	Viem, Ethers, Circle Wallets
Avalanche	Send, Bridge, Swap, Unified Balance	Viem, Ethers, Circle Wallets
Base	Send, Bridge, Swap, Unified Balance	Viem, Ethers, Circle Wallets
Codex	Send, Bridge	Viem, Ethers
Cronos	Send, Bridge	Viem, Ethers, Circle Wallets
EDGE	Send, Bridge	Viem, Ethers
Ethereum	Send, Bridge, Swap, Unified Balance	Viem, Ethers, Circle Wallets
HyperEVM	Send, Bridge, Swap, Unified Balance	Viem, Ethers
Injective	Send, Bridge	Viem, Ethers
Ink	Send, Bridge, Swap	Viem, Ethers
Linea	Send, Bridge, Swap	Viem, Ethers
Monad	Send, Bridge, Swap	Viem, Ethers
Morph	Send, Bridge	Viem, Ethers
OP Mainnet	Send, Bridge, Swap, Unified Balance	Viem, Ethers, Circle Wallets
Pharos	Send, Bridge	Viem, Ethers
Plasma	Send, Bridge	Viem, Ethers, Circle Wallets
Plume	Send, Bridge, Swap	Viem, Ethers
Polygon PoS	Send, Bridge, Swap, Unified Balance	Viem, Ethers, Circle Wallets
Sei	Send, Bridge, Swap, Unified Balance	Viem, Ethers
Solana	Send, Bridge, Swap, Unified Balance	Solana, Circle Wallets
Sonic	Send, Bridge, Swap, Unified Balance	Viem, Ethers
Unichain	Send, Bridge, Swap, Unified Balance	Viem, Ethers, Circle Wallets
World Chain	Send, Bridge, Swap, Unified Balance	Viem, Ethers
X Layer	Send, Bridge	Viem, Ethers
XDC	Send, Bridge, Swap	Viem, Ethers

Blockchain identifiers

For most blockchains, the identifier is the blockchain name with any spaces replaced by underscores (for example, Arc Testnet → Arc_Testnet). Identifiers are case-sensitive and match the per-capability enums (BridgeChain, SwapChain, UnifiedBalanceChain, EarnChain) exported from @circle-fin/app-kit:

import { BridgeChain } from "@circle-fin/app-kit";

const chain = BridgeChain.Arc_Testnet; // or "Arc_Testnet"

Some blockchains have identifier deviations:

Blockchain	Identifier
EDGE	`Edge`
EDGE Testnet	`Edge_Testnet`
OP Mainnet	`Optimism`
OP Sepolia	`Optimism_Sepolia`
Pharos Atlantic	`Pharos_Testnet`
Polygon PoS	`Polygon`
Polygon PoS Amoy	`Polygon_Amoy_Testnet`

Discover supported blockchains programmatically

The App Kit SDK provides a way to fetch supported blockchain data in code. This is useful for building a blockchain picker, validating user input against supported blockchains, or looking up metadata like explorer URLs and testnet flags. Each method returns ChainDefinition[] with fields like name, isTestnet, explorerUrl, and protocol config. See getSupportedChains for the method signature and BaseChainDefinition for the full field list.

App Kit SDK
Standalone Kits

Pass an optional operationType to narrow by capability:

import { AppKit } from "@circle-fin/app-kit";

const kit = new AppKit();

const allChains = kit.getSupportedChains();
const bridgeChains = kit.getSupportedChains("bridge");
const swapChains = kit.getSupportedChains("swap");
const unifiedBalanceChains = kit.getSupportedChains("unifiedBalance");
const earnChains = kit.getSupportedChains("earn");

The top-level App Kit SDK accepts only operationType. Bridge filters are available on the standalone Bridge Kit. Unified Balance forwarder filters are available on the namespaced API:

kit.unifiedBalance.getSupportedChains({
  forwarderSupported: "destination",
});

If you import a kit package directly, call getSupportedChains() on that kit. Each package accepts different optional filters:

Bridge Kit: chainType, isTestnet, forwarderSupported
Swap Kit, Earn Kit: none, filter the returned array yourself
Unified Balance Kit: forwarderSupported as "source" or "destination"

Onramp Kit does not expose getSupportedChains().

Bridge Kit
Swap Kit
Unified Balance Kit
Earn Kit

import { BridgeKit } from "@circle-fin/bridge-kit";

const kit = new BridgeKit();

const chains = kit.getSupportedChains({
  chainType: "evm",
  isTestnet: false,
  forwarderSupported: true,
});

import { SwapKit } from "@circle-fin/swap-kit";

const kit = new SwapKit();

const chains = kit.getSupportedChains().filter((c) => !c.isTestnet);

import { UnifiedBalanceKit } from "@circle-fin/unified-balance-kit";

const kit = new UnifiedBalanceKit();

const chains = kit.getSupportedChains({ forwarderSupported: "destination" });

import { EarnKit } from "@circle-fin/earn-kit";

const kit = new EarnKit();

const chains = kit.getSupportedChains().filter((c) => !c.isTestnet);

Supported tokens

You can specify either a contract address or an alias for any supported token.

Each capability supports different tokens:

Send: Any token. Use token aliases for common tokens or the token’s contract address for other tokens.
Bridge: USDC, EURC, WETH, cirBTC, and third-party assets registered with CCTPx.
Swap:
- Any tokens with enough liquidity to trade with major stablecoins such as USDC, EURC, USDT, USDe, DAI, and PYUSD.
- Native tokens on blockchains where Swap is supported.
- On Arc, USDC, EURC, and cirBTC.
Unified Balance: USDC only.
Onramp: USDC and EURC.
Earn: USDC and EURC.

Token aliases

App Kits works with any supported token when you supply the contract address. For convenience, you can also pass any of these case-insensitive aliases instead. The App Kit SDK resolves each alias to the token’s address on the target blockchain.

USDC
EURC
cirBTC
USDT
USDe
DAI
PYUSD
WETH
WBTC
WSOL
WAVAX
WPOL
POL
PLUME
MON
NATIVE: Uses the blockchain’s native token.

​Supported blockchains

​Blockchain identifiers

​Discover supported blockchains programmatically

​Supported tokens

​Token aliases

Supported blockchains

Blockchain identifiers

Discover supported blockchains programmatically

Supported tokens

Token aliases