Rate limits & quotas

Plans

Plan	Price	Per minute	Per day	Per month
Free	$0	30	250	—
Build	contact sales	300	—	100,000
Scale	custom	custom	—	custom

Terminal Pro subscribers get Build limits included with their subscription. Build and Scale are not self-serve at the moment — both are set up with the team: sales@prometheus.finance. Limits are per account, not per key — minting more keys does not raise your ceiling. Windows are fixed and UTC-aligned (minute, day, calendar month), enforced atomically across all serving instances.

Prepaid credits

Volume beyond your plan’s included allowance can be covered by prepaid credits at a flat $0.02/request. Credits are currently arranged with the team rather than bought self-serve; existing balances keep working. When a request is paid from credits the response carries X-Billing-Source: credits and X-Credits-Remaining-USD. Credits buy volume, never rate: the per-minute ceiling always applies. With no quota left and no credits, the 429 carries code: "quota_exceeded" and a sales_email.

Headers

Every API-key response reports where you stand:

RateLimit-Limit: 30
RateLimit-Remaining: 27
RateLimit-Reset: 41
X-Quota-Limit: 100000        (quota-carrying plans)
X-Quota-Remaining: 98314
X-Quota-Reset: 2026-10-01T00:00:00.000Z

When you hit a limit

A 429 tells you which ceiling you hit and when to come back:

{ "error": "Too many requests. Slow down.", "code": "rate_limited", "retry_after_s": 41 }

{
  "error": "Monthly request quota exhausted and no prepaid credits available. API plans and credits are currently set up by our team rather than self-serve. Contact sales at …",
  "code": "quota_exceeded",
  "quota": 100000,
  "resets_at": "2026-10-01T00:00:00.000Z",
  "sales_email": "…"
}

Honour Retry-After. Well-behaved clients back off exponentially and never retry a quota_exceeded before the reset instant.

Fetch whole objects, not lines: one /financials call returns the complete income statement, balance sheet and cash flow for up to 200 periods.

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Rate limits & quotas

Plans

Prepaid credits

Headers

When you hit a limit

​Plans

​Prepaid credits

​Headers

​When you hit a limit

Plans

Prepaid credits

Headers

When you hit a limit