Active Protection

Stop AI cost overruns before they happen.

Enforce budgets, rate limits, and cost-per-request guards in real-time. The developer-first proxy for total control.

View Documentation
dashboard.usefy.dev
Current Spend
$342.12
Total Protected
$1,240.00
POST /v1/completions
240ms200
POST /v1/embeddings
112ms200
POST /v1/gpt-4Cost guard exceeded (Max $0.50/req)
BLOCKED
GET /v1/models
45ms200
Monthly Budget Usage82%

Trusted by engineering teams at

OpenAIOpenAI
AnthropicAnthropic
CohereCohere
HuggingFaceHuggingFace

The Hidden Cost of AI Integration

Your OpenAI bill shouldn't be a surprise. Unmonitored integrations turn into financial liabilities fast.

while (true) {
const res = await ai.generate();
// Loop condition never breaks
if (!res) continue;
Error: Rate Limit Exceeded
}
⚠️

Infinite Loops

CRITICAL

One bad recursive agent loop can burn through your monthly budget in minutes.

{ }

Token Bloat

Without pre-request guards, users can send massive context windows that cost $0.50 per click.

📋

Retroactive Billing

You find out about the damage 30 days later when the invoice arrives. Real-time visibility isn't optional.

Usefy catches these before the request is sent.
WORKFLOW

Budget protection in 3 simple steps

Prevent unexpected AI API costs before they happen. No SDKs, just a simple proxy URL change.

1

Integration

Drop in our middleware by changing your baseURL. No new SDKs required.

// openai_config.js
const openai = new OpenAI({
apiKey: process.env.API_KEY,
baseURL: "https://proxy.usefy.ai"
});
2

Define Policies

Set monthly budgets, rate limits, and cost-per-request guards in the dashboard.

MONTHLY BUDGET$500.00
Hard Stop on Limit
3

Pre-flight Check

Requests are intercepted and verified against your policies in milliseconds.

App
SAFE
API
Start Protecting Budget

Platform Capabilities

Guardrails for your AI Infrastructure

LIVE
$500.00 cap

Strict Budget Limits

Hard-stop monthly or daily spend caps per API key. Never wake up to a surprise bill again.

429 Prevented

Smart Rate Limiting

Prevent provider 429 errors with local token bucket algorithms that smooth out traffic spikes.

Est. > $0.50

Cost-Per-Request Guard

Analyze prompts before sending. Automatically block individual requests that exceed projected cost thresholds.

Provider-Level Control

Granular toggles for OpenAI, Anthropic, and custom endpoints. Switch providers instantly without code changes.

<2ms

Fail-Open Architecture

Zero latency impact. If Usefy is down, your traffic bypasses our proxy automatically.

Real-time Analytics

Track spending, requests, and blocked calls in real-time with detailed breakdowns by model and endpoint.

Stop worrying about your OpenAI bill.

Implement strict budget guards and rate limits with one line of code. Secure your runway today.

protect.py
import { usefy } from '@usefy/sdk';
// Enforce strict $50 monthly limit
const guard = await usefy.init({
provider: 'openai',
budget: '50 USD',
onLimit: 'reject_request'
});
Start Protecting Your AI UsageRead the Integration Docs
Free tier available for up to 10k requests/month

Works seamlessly with

OpenAIOpenAI
AnthropicAnthropic
CohereCohere