This content originally appeared on DEV Community and was authored by Codanyks
Turning real-time price signals into agent-driven automation with the MCP server.
If you followed the MCP server series, you already know how to build a system that lets agents process goals with rich context. But what if that context came from the outside world — live, volatile, and full of opportunity?
Welcome to your first real-world input: Binance price data.
Why This Matters
This isn’t a trading bot. This is about using market signals as system triggers.
Imagine this: Bitcoin crosses $100K — and your agent kicks in, not to trade, but to do something. It could:
Alert your Telegram group
Archive a snapshot to Notion
Log the event to a custom journal
Kick off a long-running model run
Launch your NFT burn script (who knows?)
In this tutorial, we’ll plug Binance’s WebSocket API into your MCP server, triggering agents based on real-time market thresholds.
🔗 Need a refresher on WebSockets in Node.js? Check out our Real-Time Node.js WebSockets series.
The Stack
Binance WebSocket (public market data)
Node.js/TypeScript listener
MCP Server (from series)
Local Agent Functions with autonomous goals
1. Listening to Binance Price Events
Let’s build a simple WebSocket listener to subscribe to BTCUSDT ticker updates.
export function startWatcher() {
const socket = new WebSocket(
"wss://stream.binance.com:9443/ws/btcusdt@ticker"
);
socket.addEventListener("message", async (event: any) => {
const json = JSON.parse(event.data.toString());
const price = parseFloat(json.c);
if (price > 100000) {
console.log(`[Watcher] BTC crossed threshold: $${price}`);
await triggerAgent(price);
}
});
socket.addEventListener("open", () => {
console.log("[Watcher] Connected to Binance WebSocket");
});
socket.addEventListener("error", (error) => {
console.log("[Watcher] Error connecting to Binance WebSocket", error);
});
}
This code connects to Binance and listens for real-time trades. Once BTC crosses your set threshold, it fires the triggerAgent function.
2. Triggering the MCP Server
You already have an MCP route like /goal to receive instructions. Here’s a simple POST call.
import axios from 'axios';
function triggerAgent(price: number) {
axios.post('http://localhost:3000/goal', {
from: 'binance-watcher',
goal: `btc_crossed_threshold`,
context: {
price,
token: 'BTCUSDT',
condition: '> 100000'
}
});
}
This sends the signal to your MCP server, which can now dispatch it to a relevant agent.
3. Sample Agent Logic
Let’s say your MCP calls this agent:
export async function btcAgent({ context }) {
const { price, condition } = context;
const log = `BTC ${condition} at $${price}`;
console.log(log);
// Extend this: send to Telegram, Discord, Email, log to Notion, etc.
}
The action here is simple, but the framework allows infinite expansion.
The Complete Flow
Binance WebSocket → MCP Server → Agent Goal → Action
This flow mimics real-world systems that adapt to change, not just react manually. You can chain this into larger systems: trigger a build, launch a job, even orchestrate multiple agents.
Expand This Further
Trigger on multiple tokens
Use volatility-based thresholds
Send context to multiple agents
Add debouncing logic to avoid spam
Trigger external webhook actions
Source Code
Want to explore the full project? Grab the code on GitHub:
Final Thoughts
This isn’t about being a trader. It’s about being a builder who listens to the world.
Binance becomes your sensor. The MCP server becomes your router. Agents become your fingers on the keyboard.
Automation doesn’t have to be loud. Sometimes, the best systems whisper back only when it truly matters.
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This content originally appeared on DEV Community and was authored by Codanyks
Codanyks | Sciencx (2025-06-28T15:15:00+00:00) Triggering Agents with Binance Price Events. Retrieved from https://www.scien.cx/2025/06/28/triggering-agents-with-binance-price-events/
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