Agentic Profit-Margin Guard
Your AI agent feature costs $3.20 to run but users pay $9.99/month. This enforces the boundary.
The Problem
SaaS companies offering AI features at flat monthly prices are silently losing money when power users run expensive multi-step agent workflows. A user on a $9.99/month plan can trigger $50 of API costs with a single query.
The Solution
A serverless TypeScript wrapper that tracks the running cost of recursive LLM tasks against each user's subscription tier, and automatically pauses agent execution with a graceful 'usage limit reached' message when costs exceed the tier's margin threshold.
Why You Have No Choice
The alternative is manually monitoring every user's API consumption or capping features so severely that premium users churn. This is surgical — only pauses when the margin is breached.
Code Preview
This is what you'll drop into your codebase. The full package includes all configuration options and integrations.
// profit-guard.middleware.ts
import { ProfitGuard } from './profit-guard.middleware'
export const POST = ProfitGuard.wrap(myAgentHandler, {
getTier: (userId) => getUserSubscriptionTier(userId),
tiers: {
'starter': { budgetUSD: 0.10, resetHours: 24 },
'pro': { budgetUSD: 1.00, resetHours: 24 },
'enterprise': { budgetUSD: 10.0, resetHours: 24 },
},
onLimitReached: 'pause', // never errors — shows upgrade CTA
})What's in the Package
TypeScript middleware + user tier config + graceful pause UI component. Integrates with Lemon Squeezy, Stripe, or any subscription billing system.
Instant download after payment. Secure checkout via Lemon Squeezy.
⚖️ Developer Tool — Important Notice
VektorIndex developer tools are technical software packages provided to assist developers in implementing compliance-relevant technical controls. They do not constitute legal advice, legal services, or a guarantee of regulatory compliance. Each tool solves a specific technical problem — whether a tool satisfies your specific legal obligations depends on your use case, jurisdiction, and how the tool is configured and deployed. You must engage qualified legal counsel to confirm your compliance posture. VektorIndex does not represent that use of any tool will make your product compliant with any specific law or regulation.
Prices in USD. Billed monthly. Annual plans available at 20% discount. Taxes may apply depending on your jurisdiction. VektorIndex is a digital goods merchant — you are purchasing a software license, not a physical product. Subscription management: Lemon Squeezy customer portal.