Limits (HTTP & WebSocket)

Rate limits are enforced per IP based on your subscription tier.

HTTP JSON-RPC

Tier	RPS (reads)	TPS (transactions)
Build	100	15
Grow	200	35
Accelerate	500	50

WebSocket

Metric	Shared	Dedicated
Concurrent connections	10	Custom
Subscriptions per connection	50	Custom
Message rate	Fair use	Uncapped

Exceeding Limits

HTTP: returns 429 Too Many Requests. Back off and retry.
WebSocket: the server drops the oldest connection or subscription. Your client should detect the disconnect and reconnect.

If you are consistently hitting 429 responses, the options are to optimize your request patterns, for example caching or batching, or upgrade your tier. Details on all limits in one place: Limits & Fair Use.