Add blocking and human approval to any AI agent framework. One line of code, full execution control.
Runtime control for LangChain agents
Guard Model Context Protocol tool calls
Control GPT function calling at runtime
Guardrails for AI SDK tools
Multi-agent workflow control
guard() intercepts the action before execution
Policy engine evaluates and returns a decision
Action runs, blocks, or waits for approval
Add runtime control to any AI agent framework in minutes. No credit card required.