Overview

GET /v1/feed provides a WebSocket real-time feed service. Once connected, you will automatically receive streaming data from the Robinhood Chain feed -- no additional subscription steps are needed.

Connection

WebSocket wss://robinhood-ohio.flashblock.trade/v1/feed

Headers

Header	Required	Description
X-User-ID	Yes	Your API Key

Examples

JavaScript:

const ws = new WebSocket('wss://robinhood-ohio.flashblock.trade/v1/feed', {
  headers: {
    'X-User-ID': '<your-api-key>'
  }
});

ws.onopen = () => {
  console.log('Feed connected');
};

ws.onmessage = (event) => {
  const data = JSON.parse(event.data);
  console.log('Feed:', data);
};

ws.onclose = (event) => {
  console.log('Disconnected:', event.code, event.reason);
  // Implement automatic reconnection logic
};

wscat (CLI):

wscat -c "wss://robinhood-ohio.flashblock.trade/v1/feed" \
  -H "X-User-ID: <your-api-key>"

Python:

import asyncio
import websockets
import json

async def feed_client():
    uri = "wss://robinhood-ohio.flashblock.trade/v1/feed"
    headers = {"X-User-ID": "<your-api-key>"}

    async with websockets.connect(uri, extra_headers=headers) as ws:
        async for message in ws:
            data = json.loads(message)
            print(f"Feed: {data}")

asyncio.run(feed_client())

Connection Limits

Feed connection limits by plan:

Plan	Max Concurrent Connections
Free	Not available
Advanced	1
Premium	1

• Free users will receive a 403 feed_not_entitled error when connecting
• Exceeding the connection limit returns 429 feed_limit_exceeded
• Close an existing connection before opening a new one

See Pricing and Plans for full plan details.

Keep-Alive

The Gateway automatically sends WebSocket Ping frames to maintain the connection. Your client must respond with Pong frames (most WebSocket libraries handle this automatically), or the connection will be closed after a timeout.

Recommended Client Behavior

1. Auto-reconnect -- Implement reconnection logic with exponential backoff (initial 1s, max 30s)
2. Message processing -- Consume messages promptly to avoid message loss from buffer overflow
3. Heartbeat -- Ensure your WebSocket library automatically replies to Ping frames with Pong

Benchmark

Snapshot time: 2026-09-22T06:43:43Z, total number of test blocks: 291

Sequencer Feed	Win rate	P50	P90	P95	P99
Robinhood Gateway Feed	92.44%	0 ms	0 ms	8.041 ms	34.037 ms
Robinhood Chain Sequencer Feed	7.56%	2.809 ms	23.688 ms	37.332 ms	62.767 ms

Gateway achieved a success rate of 92.44%, with a P50 latency of 0ms and a P99 latency of just 34ms, indicating extremely low core forwarding delay for Hub fan-out broadcasting. The test achieved 100% block matching, with zero block loss and no disconnections.