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Connection limit


Please note the Orderbook API is not actively supported at this time. We're temporarily not accepting new integrators to post new orders.

Connections are also rate limited in order to prevent abuse of the API. If you are receiving a 503: Server Error you may have too many open connections.

The limit of open connections at any given time is not fixed, but generally it is ~20 concurrent open connections per IP address. Since this limit can vary from day to day depending on our traffic, we recommend opening a maximum of 10-15 connections per IP address.

The 0x API uses persistent connections via http keep-alive.