HTTP ReAct example
A small Node server using createAgent, tool context, and approved resume.
The complete sample lives in the repository's
examples/react-agent
directory. It creates the agent with LangChain createAgent, adds weather and
email tools, and uses LangChain's human-in-the-loop middleware to pause before
the email tool runs.
The Node handler validates a small request body, derives threadId from trusted
server identity plus a conversation ID, passes trusted context into the graph,
and supports start and resume requests. The approval call uses the same
authorized thread ID as the interrupted run.
The sample uses OpenRouter and MemorySaver so it is easy to run locally.
Replace its demo identity and logging mailer before exposing it, and use a
durable LangGraph saver in production. The Agentdock layer does not provide
authentication, authorization, model setup, or email delivery.