Rate limits - Arena API

Limits are counted but not enforced today: nothing is refused. The enforcement date will be announced in the changelog first.

Plans

Plan	Per month	Per minute
No plan (any signed-in account)	1,000	30
Arena Basic	10,000	60
Builder (not on sale yet)	100,000	120
Desk (not on sale yet)	1,000,000	600
Enterprise	Set per account	Set per account

Limits apply to the account, across all its keys. The month is the UTC calendar month.

What counts

Every keyed request counts as one.
GET /quotes counts one per instrument id.
Never counted: GET /usage, GET /status, GET /openapi.json, key management.
A refused request is not counted.

Headers

Every keyed response carries:

Header	Meaning
`RateLimit-Limit`	Plan’s requests per minute.
`RateLimit-Remaining`	Requests left this minute.
`RateLimit-Reset`	Seconds until the minute resets.
`Arena-Quota-Limit`	Plan’s requests per month.
`Arena-Quota-Remaining`	Requests left this month.
`Arena-Quota-Reset`	Seconds until 00:00 UTC on the 1st.
`Arena-Plan`	`none`, `basic`, `builder`, `desk` or `enterprise`.

GET /usage returns the same in a body, plus this key’s own count and enforced. Unkeyed calls (GET /status, or a missing or bad key) carry advisory RateLimit-* headers at 60 per minute per IP. Nothing is refused on them.

When enforced

Response	Cause	Retry
`429 rate_limited`	Over the minute limit.	After `Retry-After` seconds.
`429 quota_exceeded`	Over the month.	`Retry-After` runs to 00:00 UTC on the 1st, or upgrade the plan.

Both carry Retry-After and error.retryAfterSeconds.