Your AI API bill can double overnight and you won't know until the invoice. Here's a 20-line fix.
I run a swarm of AI agents that call LLM APIs all day. One night a retry loop went haywire and burned through 3 days of budget in two hours. I didn't find out until the invoice email the next morning. That's the problem with API spend: there's no dashboard that pings you the moment something goes wrong. You have to go look for it. So I wrote a small stdlib-only Python script that watches a CSV of…
Most people find out their API spend has increased only when they receive the invoice in the mail. This reporter learned the hard way after a bug caused a swarm of AI agents to burn through their budget in just two hours before the next day's email arrived. The problem is that there's no automated system that alerts you in real-time when spending goes off the rails.
To solve this, the author wrote a simple Python script that scans a CSV file of daily spend, compares it to a configured threshold, and immediately notifies you via a Slack or Discord webhook if the limit is breached. The script requires no additional dependencies or cloud services, just a CSV with a cost_usd column and a webhook URL to send the alert to.
Once you integrate it into your scheduling system, you'll be notified well before the massive bill arrives.
Written by urgent.news from Dev.to's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
