Rate Limits & Quotas

Every limit on this page exists in production today — there are no undocumented ones, and nothing here is aspirational.

Platform API

The Platform API (organization + user endpoints) currently has no fixed request-rate limit. Reasonable integration traffic — including bulk account provisioning — needs no throttling on your side.

Fair use applies: if a runaway integration ever degrades service we may contact you or introduce limits, announced in advance via the changelog. Design for it cheaply by respecting Idempotency-Key on writes and backing off on ENGINE_UNREACHABLE / IDEMPOTENCY_KEY_IN_PROGRESS — see Idempotency.

Trade API

The trade engine rate-limits per account, per action category using token buckets: each category has a burst capacity and a steady refill rate. Short bursts up to the capacity are fine; sustained throughput is the refill rate.

Action category	Endpoints	Burst	Sustained
Order submissions	`POST /trade/order`	10	10/s
Order modifications	modify, attach/detach bracket	10	10/s
Order cancellations	cancel, cancel-all	20	20/s
Position close / flatten	close, reverse, close-all, flatten	5	2/s
Copy config changes	all `/trade/copy/*` writes	10	2/s
Lockout operations	create/delete lockout	5	1/s

Exceeding a bucket returns 429 with code RATE_LIMITED and full retry guidance in the body:

{
  "success": false,
  "data": null,
  "error": "Rate limit exceeded for order submissions. Max 10 requests per second per account. Retry after 0.1 seconds.",
  "code": "RATE_LIMITED",
  "rate_limit": {
    "limit": 10,
    "remaining": 0,
    "reset": 1711800125,
    "retry_after": 0.1
  }
}

Handle it by sleeping rate_limit.retry_after seconds and retrying — that value is exact, not an estimate. The same rate_limit block also rides along on successful responses so you can pace proactively.

Limits are per account: a copy-trading leader fanning out to followers doesn’t consume the followers’ buckets — mirrored executions are internal and unmetered.

Webhooks & event stream quotas

Not request-rate limits, but the delivery-side quotas to size for (details in the webhooks guide):

Quota	Value
Webhook endpoints per organization	5
Delivery timeout	10 s (respond 2xx within it)
Delivery attempts	5, with backoff (immediate, 1 m, 5 m, 30 m, 2 h)
Auto-disable	after 25 consecutive failures
Minimum spacing between deliveries to one endpoint	200 ms
Concurrent org event-stream WebSocket connections	10 per organization
Event-stream catch-up replay (`?since=`)	1,000 events per reconnect

Market Data API

No request-rate limits on the REST endpoints. Access is governed by licensing instead: a valid CME agreement plus active entitlements per user, and WebSocket entitlement refreshes are throttled to one per 2 seconds server-side.

Get Started

Core Concepts

Guides

Platform API

Trade API

Webhooks & event stream quotas

Market Data API

​Platform API

​Trade API

​Webhooks & event stream quotas

​Market Data API

Platform API

Trade API

Webhooks & event stream quotas

Market Data API