> ## 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.

> [card] [Subscribe](https://www.helius.dev/docs/api-reference/laserstream/grpc/subscribe.md)
>
> Subscribe to accounts, transactions, blocks, and slot updates to receive real-time notifications.

> [card] [Subscribe Replay Info](https://www.helius.dev/docs/api-reference/laserstream/grpc/subscribereplayinfo.md)
>
> Get the earliest available replay slot without opening a subscription.

> [card] [Get Block Height](https://www.helius.dev/docs/api-reference/laserstream/grpc/getblockheight.md)
>
> Get the current block height of the Solana blockchain.

> [card] [Get Latest Blockhash](https://www.helius.dev/docs/api-reference/laserstream/grpc/getlatestblockhash.md)
>
> Get the latest blockhash from the Solana blockchain.

> [card] [Get Slot](https://www.helius.dev/docs/api-reference/laserstream/grpc/getslot.md)
>
> Get the current slot number from the Solana blockchain.

> [card] [Get Version](https://www.helius.dev/docs/api-reference/laserstream/grpc/getversion.md)
>
> Get the version information of the LaserStream gRPC API and the Solana node it's connected to.

> [card] [Is Blockhash Valid](https://www.helius.dev/docs/api-reference/laserstream/grpc/isblockhashvalid.md)
>
> Check if a blockhash is still valid on the Solana blockchain.

> [card] [Ping](https://www.helius.dev/docs/api-reference/laserstream/grpc/ping.md)
>
> Check connectivity to the LaserStream gRPC API with a simple ping-pong mechanism.


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