AgentGuard monitors API calls in real-time and automatically kills your process when it hits your budget limit.

How it works:

Add 2 lines to any AI project:

  const agentGuard = require('agent-guard');
  await agentGuard.init({ limit: 50 }); // $50 budget

  // Your existing code runs unchanged
  const response = await openai.chat.completions.create({...});
  // AgentGuard tracks costs automatically

Why I built this:

I got tired of seeing "I accidentally spent $500 on OpenAI" posts. Existing tools like tokencost help you measure costs after the fact, but nothing prevents runaway spending in real-time.

AgentGuard is essentially a circuit breaker for AI API costs. It's saved me from several costly bugs during development.

Limitations: Only works with OpenAI and Anthropic APIs currently. Cost calculations are estimates based on documented pricing.

Source: https://github.com/dipampaul17/AgentGuard

Install: npm i agent-guard