> ## Documentation Index
> Fetch the complete documentation index at: https://cosmos-docs-cosmjs-docs.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# HTTP Transport

> Connect to Cosmos SDK chains over HTTP using direct and batched RPC clients

HTTP is the default transport for `http://` and `https://` endpoints. Each query sends a single JSON-RPC POST request using the platform's `fetch` API. There is no persistent connection — each call is independent.

## Using High-Level Clients

Pass an HTTP URL to `connect` and CosmJS handles the rest:

```typescript theme={"system"}
import { StargateClient } from "@cosmjs/stargate";

const client = await StargateClient.connect("https://rpc.my-chain.network");

const height = await client.getHeight();
client.disconnect();
```

## Using the HTTP Client Directly

For more control, create an `HttpClient` and pass it through the CometBFT client layer:

```typescript theme={"system"}
import { StargateClient } from "@cosmjs/stargate";
import { Comet38Client, HttpClient } from "@cosmjs/tendermint-rpc";

const rpcClient = new HttpClient("https://rpc.my-chain.network");
const cometClient = Comet38Client.create(rpcClient);
const client = StargateClient.create(cometClient);
```

<Note>
  When constructing the CometBFT client manually, you need to know the node's version. Use `Tendermint37Client` for Tendermint 0.37, `Comet38Client` for CometBFT 0.38, or `Comet1Client` for CometBFT 1.x.
</Note>

## Batching HTTP Requests

`HttpBatchClient` groups multiple concurrent `execute()` calls into a single JSON-RPC batch request, reducing HTTP round-trips:

```typescript theme={"system"}
import { StargateClient } from "@cosmjs/stargate";
import { Comet38Client, HttpBatchClient } from "@cosmjs/tendermint-rpc";

const rpcClient = new HttpBatchClient("https://rpc.my-chain.network", {
  batchSizeLimit: 10,
  dispatchInterval: 50,
});

const cometClient = Comet38Client.create(rpcClient);
const client = StargateClient.create(cometClient);
```

| Option             | Type     | Default | Description                                                       |
| ------------------ | -------- | ------- | ----------------------------------------------------------------- |
| `batchSizeLimit`   | `number` | 20      | Max requests per batch. Queue flushes when this limit is reached. |
| `dispatchInterval` | `number` | 20      | Milliseconds between automatic queue flushes.                     |
| `httpTimeout`      | `number` | —       | Request timeout in milliseconds.                                  |

Batching is useful when your application fires many independent queries in rapid succession — for example, fetching balances for a list of addresses.

## Next Steps

<CardGroup cols={2}>
  <Card title="WebSocket Transport" icon="plug" href="/cosmjs/v0.38.x/guides/connect/websocket">
    Use persistent connections and real-time subscriptions.
  </Card>

  <Card title="Custom Endpoints" icon="key" href="/cosmjs/v0.38.x/guides/connect/custom-endpoints">
    Attach authentication headers to HTTP and batched clients.
  </Card>

  <Card title="Timeouts" icon="clock" href="/cosmjs/v0.38.x/guides/connect/timeouts">
    Configure HTTP request and batch timeouts.
  </Card>
</CardGroup>