HumanLayer is an AI governance API that seamlessly incorporates human oversight into automated AI workflows at critical decision points. The platform allows AI agents to pause execution and request human approval, feedback, or expert input before proceeding with high-stakes actions, creating a reliable safety mechanism for autonomous systems. Through its omnichannel notification system including Slack, email, and Discord integration, HumanLayer ensures the right humans are involved at the right time, with features like multi-step approvals, escalation paths, and comprehensive audit trails. Developers building AI systems with LangChain, CrewAI, LlamaIndex, or OpenAI can easily implement this human-in-the-loop architecture to enhance trust, maintain quality control, meet compliance requirements, and reduce the risk of AI errors while still benefiting from automation in business-critical processes.