How many Polygon WebSocket connections can I use at one time?

Knowledge Base/How many Polygon WebSocket connections can I use at one time?

FAQ

WebSockets

Each account comes with access to one simultaneous WebSocket connection per cluster.

WebSocket connections are provided for all paid plans. Additional WebSocket connections can be purchased by contacting our support team. Review the table below for a breakdown on the connections.

Plan Type	Connections	Features	Additional Connections
Individual	1 per purchased product (Stocks/Options/Indices/Currencies)	Stream unlimited tickers/events in one feed (e.g., AAPL trades, GM quotes, F aggregates per minute)	$75/month per connection
Business	3 per purchased product (Stocks/Options/Indices/Currencies)	Stream unlimited tickers/events in one feed (e.g., AAPL trades, GM quotes, F aggregates per minute)	$75/month per connection

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Title
Are all Indices available through the basic subscription tier?
Data Coverage Category
Data Coverage
Indices Category
Indices
Description
No, certain indices are only available through paid subscription tiers.
Title
Does Polygon offer dark pool data?
Data Coverage Category
Data Coverage
Stocks Category
Stocks
Description
Yes, we provide dark pool data. If a trade comes through with an exchange ID of 4 (exchange:4) and also has an attached “trf_id” field, it came from a dark pool.
Title
Does Polygon offer pre-market and after-hours data?
FAQ Category
FAQ
Stocks Category
Stocks
Description
Yes, we provide data for every trade that occurs, including during pre-market and after-hours. Our tick-level market data streams during these extended hours as well.

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