Dev.to
7/12/2026

How to Stop AI Agent Cost Blowups Before They Happen
Short summary
agent-cost-guardrails is an open-source Python library that enforces hard budget limits, per-call token caps, rate limiting, and circuit breakers on AI agent LLM calls without external infrastructure. It hooks directly into frameworks like CrewAI, AutoGen, and LangGraph at the process level, raising BudgetExceededError before costs spiral. The library addresses the core problem that agents make autonomous decisions about LLM call volume, which can silently 10x bills through retry loops and stuck tool calls.
- •Open-source library enforces hard budget limits and circuit breakers on AI agent LLM calls
- •Framework-native hooks for CrewAI, AutoGen, and LangGraph with zero external infrastructure
- •Addresses runaway costs from retry loops, verbose chain-of-thought, and stuck tool calls
Generated with AI, which can make mistakes.
Is this a good recommendation for you?



