Yes, FYERS enforces a subscription limit to maintain performance and data reliability for all users of its Market Data WebSocket API v3. This ensures the real-time feed remains stable, especially under heavy load or high-frequency scenarios.
You can subscribe to a maximum of 200 symbols concurrently using the data-websocket in API v3. This means your application can actively receive live updates for up to 200 instruments at any given time.
This cap applies to all live instruments, including equities, indices, and derivatives, and is counted based on unique symbol subscriptions.
| Scenario | Outcome |
|---|---|
| You attempt to subscribe to more than 200 symbols | The subscription request will be rejected; symbols beyond the limit won't receive updates |
| You need more than 200 symbols | You'll need to manage subscriptions dynamically by unsubscribing from less-used symbols |
| You’re unsure how many symbols are currently active | Track your active subscriptions client-side, as FYERS does not return a list of current subscriptions |
Last updated: 30 Jun 2025