Durable execution
Checkpoints graph state so workflows can continue after pauses or failures.
Agent Orchestration
LangGraph
LangGraph for durable agent workflows: graphs, checkpoints, and policy-gated tools around live phone sessions.
Agent frameworkStatefulWorkflowsDurableGraph orchestration
Where it fits
LangGraph in your voice stack.
- TelephonyPhone networkInbound call
- AgentDuetCall + audioAnswer, stream
LangGraph — durable graphs & tools
Speech-to-speechLive modelListens, call functions, repliesToolsGraph toolsPolicy-gated actions
Overview
What it contributes to the stack.
LangGraph is a low-level runtime for stateful agents, with persistence, streaming, interrupts, and human-in-the-loop execution. AgentDuet call events can become graph inputs while graph state tracks progress, collected fields, and pending actions; live audio stays outside graph state.
For setup, credentials, and API details, use the Documentation link above.
Capabilities
The technical characteristics that matter when deciding whether this provider belongs in your application.
Explicit branching
Models decisions, retries, fallbacks, and agent loops as transitions.
Tool-gated policy
Keeps fulfillment checks and order mutations in deterministic graph tools.
Layered memory
Separates thread checkpoints from longer-lived information stores.
Common use cases
Practical scenarios where the provider's role is clear and the surrounding systems remain under application control.
Order tracking and changes
Authenticate an order, speak shipping status, and gate address or cancel actions.
Order exceptions
Branch between replacement, refund, investigation, and status-only replies.
Multi-turn intake
Collect order facts over several turns and resume from checkpointed state.
Related integrations
Compare nearby choices.
These providers occupy a similar role in the stack. Compare their strengths, operating model, and surrounding services.
Browse every integration
Build a voice agent.
AgentDuet handles the phone and messaging boundary. Your model runs the conversation.