Digital Assets Custody

Secure your customers' digital assets

Our white-labeled Custody API integrates smoothly into your frontend, allowing you to safely store your customers digital assets at scale.

Create frictionless user experiences

Our fully licensed solution, provided by Solaris Digital Assets GmbH, takes away the regulatory and technical complexity of managing and securing your users' digital assets. Our internal bookkeeping system enables instant off-chain crypto transfers between your customers, significantly reducing your network fees.


We enable a number of use cases

Already offering Digital asset services

Crypto Exchanges and Brokers

Take away the risk of self-custody from your users and boost their interaction with your exchange or trading app.

STO Platforms

Offer your investors a secure and convenient way to participate in your STO. From the identification process and collection of fiat funds to the custody of your tokens, our APIs have you covered from end to end.
Start offering Digital asset services

Financial Institutions

Diversify your product portfolio by giving your customers the opportunity to invest in digital assets. Our state-of-the-art platform can be integrated seamlessly into the offerings of private banks, investment banks and security brokers.


Whether you are a neobank, a roboadvisor or a digital broker, by offering your customers transparent and convenient crypto-wallets, you can tap into new revenue streams and gain a competitive edge.

Your benefits

Highest security standards

Your users' digital assets are stored in a distributed manner through a threshold signature (multi-party computation). This provides instant access for your users while avoiding any single point of failure.

Around-the-clock availability

Our internal bookkeeping system performs off & on-chain transactions, allowing your customers to make instant crypto transfers between each other for free and at any time.

Full regulatory empowerment

As a fully licensed crypto-custodian we safekeep your users‘ digital assets compliantly. In addition, we ensure compliance with the AML 5 directive through our real-time transaction and user monitoring and our integrated KYC solution.

Faster time to market

Our modern RESTful APIs are thoroughly documented and accessible in a sandbox environment. Our team of specialists can help you get your product live in as little as 1-2 months.

Our API - elegant and easy to integrate


This endpoint lets you create an account for your end customer in our bookkeeping system, to which multiple blockchain adresses can be linked.

Sample endpoints of our API
POST /v1/entities/{entity_id}/accounts
GET /v1/entities/{entity_id}/accounts
GET /v1/entities/{entity_id}/accounts/{account_id}

A POST to this endpoint triggers a a Withdrawal, which represents a single transfer of funds from an Account to an external blockchain-level address.

Sample endpoints of our API
POST /v1/entities/{entity_id}/accounts/{account_id}/transactions/withdrawal

A transfer represents an off-chain transfer from one account to another on our internal bookkeeping system, meaning it is instant and not subject to network fees.

Sample endpoints of our API
POST /v1/entities/{entity_id}/accounts/{account_id}/transactions/transfer

Secure your customers' digital assets