# Initializing the Yellowstone Client

The Yellowstone client is used to <mark style="color:yellow;">connect to gRPC</mark> on Solana, sending <mark style="color:yellow;">subscribe requests</mark> and receive data from stream. The gRPC streams and RPC calls are supported through Solana's Geyser interface. To initialize a  new Yellowstone client in typescript, you need to install the following package.

```bash
npm i @triton-one/yellowstone-grpc
```

Once done, we need two parameters to initialize the client, the gRPC endpoint, and the x-token, both of which is available in the Shyft dashboard once you unlock gRPC. You can find out more about [endpoint and access token](/solana-yellowstone-grpc/docs.md#authentication) here.

{% tabs %}
{% tab title="TypeScript" %}

```javascript
import Client from "@triton-one/yellowstone-grpc";

const client = new Client(
  "https://grpc.ams.shyft.to", //your region specific grpc endpoint
  "YOUR-ACCESS-XTOKEN", // xtoken, which is used to authenticate
  undefined,
);
```

{% endtab %}
{% endtabs %}

{% hint style="success" %}
Please note that some gRPC connections only take in the <mark style="color:yellow;">endpoint</mark> parameter to make a connection, in those cases, <mark style="color:yellow;">IP whitelisting</mark> is required to authenticate your connection. Find out more about making a connection in our docs [here](/solana-yellowstone-grpc/docs.md#authentication).
{% endhint %}


---

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