xReserve API

Deposit USDC into xReserve, retrieve attestations, and manage withdrawals for USDC-backed stablecoins.

xReserve is the interoperability layer behind your own USDC-backed stablecoin. Circle holds the underlying reserves on source blockchains such as Ethereum and exposes the state and lifecycle to you through the API. The xReserve API is permissionless, so no API key is required.

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xReserve documentation

Learn how xReserve works.

Endpoint categories

Attestations

List, retrieve, and look up attestations by transaction hash.

Balances

Read reserve balances and reserve info.

Withdrawals

Prepare, submit, and track withdrawals.