Assign an external Address as a Deposit Address

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Attention

Access to this feature is limited to existing Virtual Account users on PayGo and higher tiers who registered before November 24, 2025

Virtual Accounts support adding existing blockchain addresses as Deposit Addresses.

• You can add an address by using the following v3 REST API endpoint.
• The most common use is for EVM-based (like Ethereum) Gas Pump.

Example request:

curl --request POST \
  --url 'https://api.tatum.io/v3/offchain/account/{id}/address/{address}' \
  --header 'x-api-key: {YOUR_API_KEY}'
//Response:
{
  address: '0x6d7abd9f164db455e5aabfb5a53307e8d5657555',
  currency: 'MATIC' // The currency will match the same as the Account
}

Good to Know

• Assigning a blockchain address to a Virtual Account created with an XPUB is impossible.
• Any on-chain assets already present in the blockchain address to bind to the Virtual Account will be ignored—more information HERE.

Important

The intended use case for Virtual Accounts (VA) is as a Self-Custodial Exchange, meaning all withdrawals are expected to be tracked in the VA ledger.

• Tatum does not hold custody of mnemonics or private keys. As a result, it is technically possible to sign transactions using VA ledger deposit addresses outside the VA ledger and Tatum endpoints. For more details, refer to this article.
• The blockchain’s on-chain balance takes precedence over the VA ledger. If unregistered transactions occur, the VA ledger will become misaligned, leading to liquidity inconsistencies between the on-chain balance and the off-chain VA ledger.
• Virtual Accounts are designed to hold a limited number of deposit addresses (1-5). While adding many more deposit addresses may appear functional, this setup often leads to unrecoverable synchronisation issues across users over time.
• Any on-chain assets already present in a blockchain address to bind to a Virtual Account will be ignored. More information HERE.
• Deposits are only "recognized" as long as the "currency" of the VA matches the on-chain asset deposited
• If a mistake occurs when creating or storing a withdrawal in the VA ledger, it can be deleted and retried. Check this article for addtional details.
• Withdrawals from a VA deposit address can be automated using the VA Blockchain Operationsendpoints, ensuring they are properly logged in the VA ledger.

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Attention

• You are expected to hold 1:1 asset liquidity between the VA off-chain ledger and your end-users on-chain assets.
• To avoid potential disruptions and ensure consistent performance, we recommend adhering to the intended usage of 1-5 deposit addresses per Virtual Account.
• Be mindful of Tatum Derivation Path.

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Warning

• All withdrawals must be registered and executed through VA-specific endpoints.
• Using standard blockchain transaction methods to sign and broadcast a transaction from a VA-linked deposit address bypasses the VA ledger, leadings to balance discrepancies. If this happens, the withdrawal must be manually registered.