Retell multi-prompt agent import with native Telnyx multi-agent workflows

14, Nov 2025

Telnyx now imports Retell multi-state agents as a native multi-agent graph. This preserves state boundaries and uses deterministic handoff, which stabilizes branching and reduces failure rates in state-driven call flows.

What’s new

State detection: Importer reads all Retell states, tools, and transitions.
Assistant-per-state mapping: Each state becomes a Telnyx assistant with its own instructions and tools.
Deterministic handoff: Retell transitions convert to Agent Handoff Tool rules.
Context continuity: Dynamic variables and metadata transfer across assistants.
Voice and model mapping: Retains Retell voice, transcription, and model settings.
Import modes: Supports flattening into one assistant or a multi-assistant graph.

Why it matters

Restores the structure of multi-state Retell agents that previously collapsed into a single prompt.
Prevents incorrect tool execution and broken transitions in multi-step workflows.
Improves predictability for branching paths such as callbacks, bookings, or escalations.
Preserves context across assistants to avoid repeated questions or lost variables.

Example use cases

Lead qualification flows with multiple branching states.
Appointment or tour scheduling with dedicated tools per state.
Compliance workflows that require isolated logic per state.

Getting started

In Mission Control Portal, open Assistants and select Import assistant.
Choose Retell as the source and confirm your stored Retell API key.
Select the Retell multi-prompt agent you want to import.
Load available agents and choose the one to import.
Review the generated assistants. Each Retell state appears as its own Telnyx assistant with mapped handoff rules.
Inspect the workflow graph to confirm transitions match the original Retell prompt tree.
Test the imported workflow directly from the assistant view and review handoff events in Conversation History.

Head over to your mission control portal to try this today