Fusebox-style API Bill Sentinel

Stop runaway OpenAI and AI API bills before they happen with email and phone alerts

Problem

When experimenting with AI APIs or running agents, a runaway loop, missing rate limit, or out-of-control agent can rack up a huge bill before you notice. Cloud budget alerts are coarse, delayed, and don't cover the OpenAI balances individual developers actually use.

Solution

A lightweight monitoring service: users connect their OpenAI (and similar) API keys, it polls usage and balance, applies hourly/daily/monthly thresholds, and alerts via email, Telegram, or webhook the moment spend spikes or approaches budget. It can also pause usage or throttle through a proxy layer.

Users

Indie developers, small teams, and heavy AI users running agents and experiments on their own API keys.

MVP

Poll OpenAI usage and balance; custom daily/monthly budget thresholds; email + Telegram alerts; simple dashboard with spend curve; encrypted API key storage.

Revenue

Free for one key; $5–9/month for multiple keys, webhooks, and team alerts.

Why now

AI API spending is exploding and billing incidents are common, but nobody offers fine-grained personal alerts. Polling plus alerting is simple enough for a solo developer to ship quickly.