Supported blockchains and domains

Non-USDC transfers are supported on EVM-compatible blockchains only. The domain IDs are shared with CCTP. Trust is configured bilaterally: a domain must be added as trusted on both ends before transfers can route between them.

Supported blockchains

The following EVM-compatible blockchains have CCTP for non-USDC deployments. The table includes both mainnet and testnet environments; domain IDs are consistent across both. Non-EVM blockchains, including Solana, are not supported.

Blockchain	Domain ID
Ethereum	0
Avalanche	1
OP Mainnet	2
Arbitrum	3
Base	6
Polygon PoS	7
Arc Testnet	26

Domain IDs match the CCTP domain identifiers. For deployed contract addresses, see Contract Addresses.

Pre-configured tokens

The following tokens are pre-configured on the supported blockchains. Token IDs are stable identifiers used in API calls, contract interactions, and code samples.

Token	Symbol	Type	Token ID
Euro Coin	EURC	Custom	`0x6ca9e29fa53becc29becaf4a90b9ca7a995ad4d2234880da13ca38c657fb241c`
Circle Wrapped Bitcoin	cirBTC	Custom	`0x3d26699fb5d40190fc3fa0dcbc1cd24e558355043c1997572ff9fd6efbb3fdca`
Wrapped Ether	WETH	Ownerless	`0x5c2cf12eccf48ab63313169ce192dc00af7c37a58bbc546ba4becf54df4962ea`

USDC transfers use standard CCTP. To transfer USDC across blockchains, use CCTP. To retrieve the full list of supported tokens and routes, including sandbox token IDs and per-domain deployment addresses, query the Iris API. The endpoint is paginated. Use pageSize to set the number of results per page, and pageAfter with the nextPageAfter value from the previous response to advance to the next page. Pass tokenid to filter by a specific token:

# All tokens (mainnet)
curl https://iris-api.circle.com/v2/cctpx/tokens

# Filter by token ID (mainnet EURC)
curl "https://iris-api.circle.com/v2/cctpx/tokens?tokenid=0x6ca9e29fa53becc29becaf4a90b9ca7a995ad4d2234880da13ca38c657fb241c"

# All tokens (sandbox) with a custom page size
curl "https://iris-api-sandbox.circle.com/v2/cctpx/tokens?pageSize=150"

# Next page (sandbox)
curl "https://iris-api-sandbox.circle.com/v2/cctpx/tokens?pageSize=150&pageAfter=<nextPageAfter>"

Domain trust

The CrossChainTokenService on each domain maintains its own list of trusted remote domains. Both the source and destination services must list each other before transfers route successfully. To check whether a remote domain is configured on the local service, call isTrustedDomain.

CCTP for USDC

CCTP for non-USDC

Gateway

Supported blockchains and domains