Early Production

AI API Cost Control
that just works.

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

Get Started

View Documentation

Usage

Usage & LimitsPro

Monthly Requests

102/100,000

API Keys

2/5

Integrations

2/5

Webhooks

1/5

Team Members

0/5

Step 2 of 3

Create Your First Policy

Set spending limits and usage rules to control your AI costs.

Total Saved

$1.2k

All time

Total Cost

EST.

$3.8k

Last 30 days

Total Requests

128450

Last 30 days

Blocked Requests

2847

Policy enforced

Active Policies

Protecting your usage

Savings Trend

View Report

Jan 5

Jan 7

Jan 9

Jan 12

Jan 14

Jan 15

$312.40

Jan 16

Efficiency Insight

You've saved $1.2k so far with 3 active policies.

9% saved

Works seamlessly with

OpenAI

Anthropic

Google

Cohere

Mistral

DeepSeek

Perplexity

xAI

Real-time cost control for LLM APIs

Usefy is a transparent proxy layer between your application and AI providers. It enforces budget limits, rate policies, and cost guards before requests reach the API.

Critical

The Problem

Uncontrolled LLM spending in production. Recursive loops can drain monthly budgets in minutes. Invoices arrive 30 days late.

Usefy

The Solution

Pre-request policy enforcement. Budget caps, rate limits, and cost-per-request guards that block expensive requests before they execute.

Teams

For Who

Developers, engineering teams, and SaaS companies integrating OpenAI, Anthropic, Google, or any LLM API into production systems.

Available globally • Instant signup • Public documentation

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.

Integration

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

// Just change your baseURL

const openai = new OpenAI({

apiKey: "YOUR_USEFY_API_KEY",

baseURL: "https://api.usefy.ai/v1/proxy/openai"

);

Define Policies

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

MONTHLY BUDGET$500.00

Hard Stop on Limit

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.

FOR ENGINEERING LEADERS

Know exactly who's spending what

CTOs and Engineering Managers need visibility. Track every team member's AI usage with detailed breakdowns by tokens, costs, and integrations.

Per-Member Budget Limits

NEW

Assign individual budget limits to each team member. Only admins can modify policies - members can't bypass their limits.

Cost Breakdown by Provider

Understand which AI providers are driving costs. Compare OpenAI vs Anthropic vs Gemini spend instantly.

Automated Reports

Get daily and weekly usage reports delivered to your inbox. Know exactly where budget is going.

API Keys & Integrations Audit

Track how many API keys each member has and which integrations they're using. Full visibility for security audits.

Team AnalyticsLast 30 days

12.5k

Requests

$142.50

Total Cost

Members

MemberCost

john@company.com

$45.20

sarah@company.com

$38.90

mike@company.com

$28.40

5 more members...

$30.00

Get Team Visibility

Available on Pro and Enterprise plans

Stop worrying about your AI API costs.

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

app.py

# Just change your base URL

client = OpenAI(

base_url="https://api.usefy.ai/v1/proxy/openai",

api_key="us_live_xxx" # Your Usefy key

)

Start Protecting Your AI Usage Read the Integration Docs

Free tier available for up to 10k requests/month

Start freeNo credit card requiredCancel anytime

AI API Cost Control that just works.