Agentspan is an open-source server and SDK for running AI agents as durable workflows. You can define agents programmatically, execute them server-side, and inspect each run and execution state in the UI. Agentspan adds crash recovery, human-in-the-loop approvals, guardrails, tool history, and observability around the agent frameworks and LLMs you already use. MIT licensed.
Building durable agents with Agentspan? Explore GraphBit for a Rust-core, Python-first stack, Trigger.dev for managed agent workflows, and Dify.AI for open-source LLMOps. Want model depth? Claude by Anthropic excels at reasoning, while Lyzr offers private Agent SDKs for enterprise apps.