Start using HollowDB-as-a-Service.

HollowDB is an open-source project, however due to the nature of working with a blockchain in the background, setting up your own project comes with a slight overhead.

  • If you are using a backend, you will have to manage a wallet to do the transactions.

  • If you are using Bundlr, you need to fund your Bundlr wallet.

  • You might have to do some tricks to improve your performance, to avoid waiting for transaction confirmations and such.

  • Or, you simply do not do any of the above, and use HollowDB-as-a-service.

The purpose of our service is to provide a web2-like key-value database, abstracting away all the web3-like problems of wallet managements and blockchain TPS limitations. All that is left for the user is to create an API-key, and start using the key-value database.

See our website here:

HollowDB Client

We provide an NPM package to get you started with our service.


HollowDB client is an NPM package. You can install it as:

yarn add hollowdb-client    # yarn
npm install hollowdb-client # npm
pnpm add hollowdb-client    # pnpm


Create a new client with:

client = await HollowClient.new({
  apiKey: 'your-api-key',
  db: 'your-database-name',

After that, using the client is as simple as it gets:

// without zero-knowledge proofs
await client.get(KEY);
await client.put(KEY, VALUE);
await client.update(KEY, VALUE);
await client.remove(KEY);

If you are connecting to a database that has zero-knowledge proof verifications enabled, you will need to provide proofs along with your requests.

You can use our HollowDB Prover utility to generate proofs with minimal development effort. Assuming that a proof is generated for the respective request, the proof shall be provided as an additional argument to these functions.

// with zero-knowledge proofs
await client.get(KEY);
await client.put(KEY, VALUE);
await client.update(KEY, VALUE, PROOF);
await client.remove(KEY, PROOF);

See more about the prover utility here:

HollowDB Prover

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