diff --git a/docs/base-chain/flashblocks/apps.mdx b/docs/base-chain/flashblocks/apps.mdx
index a96c26d57..2dc406e26 100644
--- a/docs/base-chain/flashblocks/apps.mdx
+++ b/docs/base-chain/flashblocks/apps.mdx
@@ -200,6 +200,80 @@ curl https://sepolia-preconf.base.org -X POST -H "Content-Type: application/json
}
```
+#### eth_subscribe Beta
+
+Subscribe to real-time streams of Flashblocks data via WebSocket. Three subscription types are available:
+
+Requires node-reth minimum client version v0.3.0
+
+- **pendingLogs** - Stream logs from transactions in Flashblocks
+- **newFlashblockTransactions** - Stream transaction hashes included in the block
+- **newFlashblocks** - Stream the pending block as new Flashblocks arrive
+
+```javascript
+import WebSocket from 'ws';
+import { createHash } from 'crypto';
+
+const ws = new WebSocket('wss://sepolia.flashblocks.base.org/ws');
+
+ws.on('open', () => {
+ console.log('Connected to Flashblocks WebSocket');
+ // Subscribe to new Flashblocks
+ ws.send(JSON.stringify({
+ jsonrpc: "2.0",
+ method: "eth_subscribe",
+ params: ["newFlashblockTransactions"],
+ id: 1
+ }));
+});
+
+ws.on('message', (data: WebSocket.Data) => {
+ try {
+ if (Buffer.isBuffer(data)) {
+ if (data.length >= 37) {
+ const txHash = '0x' + data.slice(5, 37).toString('hex');
+ console.log(txHash);
+ }
+ } else {
+ const response = JSON.parse(data.toString());
+ if (response.id === 1) {
+ console.log('✓ Subscribed');
+ }
+ }
+ } catch (error) {
+ // Handle error
+ }
+});
+
+ws.on('error', (error) => {
+ console.error('WebSocket error:', error);
+});
+
+ws.on('close', () => {
+ console.log('WebSocket connection closed');
+});
+```
+
+#### base_transactionStatus Beta
+
+Check whether a transaction is present in the mempool:
+
+Requires node-reth minimum client version v0.3.0
+```
+curl https://sepolia-preconf.base.org -X POST -H "Content-Type: application/json" -d '{"jsonrpc":"2.0","method":"base_transactionStatus","params":["0x..."],"id":1}'
+```
+
+**Example Response**
+```
+{
+ "jsonrpc": "2.0",
+ "id": 1,
+ "result": {
+ "status": "pending"
+ }
+}
+```
+
### Libraries
You will need to use a Flashblocks-aware RPC endpoint to use Flashblocks with the following libraries: