> ## Documentation Index
> Fetch the complete documentation index at: https://doc.prometheus.services/llms.txt
> Use this file to discover all available pages before exploring further.

# Rate limits & quotas

> Per-plan limits, enforced in fixed UTC windows, surfaced in headers.

## Plans

| Plan  | Price    | Per minute | Per day | Per month |
| ----- | -------- | ---------- | ------- | --------- |
| Free  | \$0      | 30         | 250     | —         |
| Build | \$200/mo | 300        | —       | 100,000   |
| Scale | custom   | custom     | —       | custom    |

Terminal Pro subscribers get Build limits included with their subscription. Upgrade from
the Developers page; Scale is set up with the team —
[sales@prometheus.finance](mailto: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.

## 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:

```json theme={null}
{ "error": "Too many requests. Slow down.", "code": "rate_limited", "retry_after_s": 41 }
```

```json theme={null}
{
  "error": "Monthly request quota exhausted.",
  "code": "quota_exceeded",
  "quota": 100000,
  "resets_at": "2026-10-01T00:00:00.000Z"
}
```

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

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