LimitGuard – Cloud API spend limit auditor

Verify that your cloud providers' spend limits are actually enforced, before a bill blows up

Problem

A developer set a $30 spend limit on OpenAI, but after their API key was hacked they saw $285 in unauthorized charges within an hour. The limit was meaningless because the enforce checkbox wasn't ticked. These silent failures in safety controls are dangerous: users believe they are protected when they are fully exposed.

Solution

Connect your cloud accounts (OpenAI, Anthropic, AWS, etc.) and automatically audit whether all spend limits, budget alerts, and guardrails are actually enabled. Continuously monitor usage anomalies and warn before real overspend. The core is auditing, not replacing provider consoles.

Users

Indie developers using multiple cloud APIs, small-team CTOs, technical leads at startups

MVP

Support OpenAI and Anthropic; read API key account settings to check if spend limits are enforced; poll usage daily against budgets; send email or Slack alerts on anomalies; provide a 'limit configuration health score' report.

Revenue

Monthly subscription: free for 1 account, $9/month for multiple accounts and team-shared alerts; also offer one-time audit reports as a pay-per-use option.

Why now

AI API bills are ballooning and key leaks are common, yet cloud spend limit configuration remains counterintuitive and prone to silent failure. Indie developers are extremely cost-sensitive and willing to pay to prevent bill blowups, with low technical barrier.