> ## Documentation Index
> Fetch the complete documentation index at: https://docs.spark.money/llms.txt
> Use this file to discover all available pages before exploring further.
# Wallet Viewer API
> SparkReadonlyClient methods for querying balances, transfers, deposits, and token data.
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The `SparkReadonlyClient` provides read-only access to wallet data on the Spark network. Use it for dashboards, explorers, analytics, or any scenario where you need to query data without full wallet initialization.
Three ways to create a client:
| Factory | Auth | Use case |
| ------------------------------------------------------------------------- | ------------- | ----------------------------- |
| [`createPublic()`](/api-reference/readonly/create-public) | None | Query public wallet data |
| [`createWithMasterKey()`](/api-reference/readonly/create-with-master-key) | Identity key | Query private wallets you own |
| [`createWithSigner()`](/api-reference/readonly/create-with-signer) | Custom signer | Partner integrations |
***
## Installation
```bash npm theme={null}
npm install @buildonspark/spark-sdk
```
```bash yarn theme={null}
yarn add @buildonspark/spark-sdk
```
```bash pnpm theme={null}
pnpm add @buildonspark/spark-sdk
```
***
## Method Categories
: 
}