For Indie AI Developers

Stop Surprise AI Bills.
Get Alerts Before You Overspend.

PromptGuard tracks your OpenAI and Anthropic API costs in real-time. Set a budget, choose your alert threshold, and get notified by email or webhook before you hit your limit.

Start Monitoring — $12/mo

Cancel anytime. No usage limits.

OpenAI & AnthropicEmail AlertsWebhook SupportPer-model BreakdownReal-time Dashboard

Pro Plan

$12

per month

  • ✓Connect OpenAI + Anthropic keys
  • ✓Unlimited budget alerts
  • ✓Email & webhook notifications
  • ✓Cost breakdown by model & date
  • ✓Alert at 50%, 80%, or 100% of budget
Get Started

FAQ

Which APIs are supported?

PromptGuard currently supports OpenAI and Anthropic. Connect one or both — costs are tracked and displayed separately per provider and model.

How do alerts work?

You set a monthly budget and choose alert thresholds (e.g. 50%, 80%). When your usage crosses a threshold, we send an email and optionally hit your webhook URL.

Is my API key safe?

Your API keys are encrypted at rest and used only to fetch usage data from the provider's billing API. We never use them to make model calls.