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

# BudgetKit — Coming Soon

> Per-user AI spend limits SDK. Currently in development.

<Warning>
  BudgetKit is not yet available. This page is a preview of what's coming.
</Warning>

## What is BudgetKit?

BudgetKit wraps your Anthropic/OpenAI/Gemini calls invisibly, tracks cost per user, enforces per-plan limits, and fires alerts before a single free user generates a \$300 bill.

**One line change. Zero behavior change. Never wake up to a surprise AI invoice again.**

## Preview

```typescript theme={null}
const budget = new BudgetKit({ apiKey: 'bk_live_...' })

// Before: const response = await anthropic.messages.create({...})
// After — identical response, fully tracked:
const response = await budget.track(userId, () =>
  anthropic.messages.create({ model: 'claude-sonnet-4-6', max_tokens: 1024, messages })
)
```

## Pricing

| Plan    | Price    | Limits                                        |
| ------- | -------- | --------------------------------------------- |
| Free    | \$0      | 50 users, 1k calls tracked                    |
| Starter | \$29/mo  | 500 users, all models, email alerts           |
| Pro     | \$79/mo  | Unlimited users, webhooks, top-user dashboard |
| Scale   | \$199/mo | Multi-app, team access, custom alert rules    |

<Card title="Start with ChurnKit today" icon="chart-line-down" href="/churnkit/overview">
  ChurnKit is live now. Predict churn, score risk, and set webhook alerts in 30 minutes.
</Card>