> ## Documentation Index
> Fetch the complete documentation index at: https://www.helius.dev/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# LaserStream gRPC API

> Complete API reference for LaserStream gRPC methods. Subscribe to real-time account updates, transactions, blocks, and slot changes on Solana.

<CardGroup cols={2}>
  <Card title="Subscribe" href="/api-reference/laserstream/grpc/subscribe">
    Subscribe to accounts, transactions, blocks, and slot updates to receive real-time notifications.
  </Card>

  <Card title="Get Block Height" href="/api-reference/laserstream/grpc/getblockheight">
    Get the current block height of the Solana blockchain.
  </Card>

  <Card title="Get Latest Blockhash" href="/api-reference/laserstream/grpc/getlatestblockhash">
    Get the latest blockhash from the Solana blockchain.
  </Card>

  <Card title="Get Slot" href="/api-reference/laserstream/grpc/getslot">
    Get the current slot number from the Solana blockchain.
  </Card>

  <Card title="Get Version" href="/api-reference/laserstream/grpc/getversion">
    Get the version information of the LaserStream gRPC API and the Solana node it's connected to.
  </Card>

  <Card title="Is Blockhash Valid" href="/api-reference/laserstream/grpc/isblockhashvalid">
    Check if a blockhash is still valid on the Solana blockchain.
  </Card>

  <Card title="Ping" href="/api-reference/laserstream/grpc/ping">
    Check connectivity to the LaserStream gRPC API with a simple ping-pong mechanism.
  </Card>
</CardGroup>