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

You can now import Retell's multi-prompt agent into Telnyx and it will convert into multiple Telnyx assistants that mirror the original prompt tree. Each prompt state becomes its own assistant and uses deterministic handoff rules to preserve branching behavior.

What’s new

• Retell source import: Select and load Retell workflows directly using a stored API key into Telnyx.
• 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.
• Tool mapping: Each assistant receives the tools defined for its corresponding Retell state.
• 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

• Preserves conditional flows from Retell, such as callbacks or tour scheduling.
• Reduces errors caused by merging multi-state logic into a single prompt.
• Improves control over complex branching since each state has its own instructions and tools.
• Simplifies debugging by isolating prompt behavior per state.

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

1. In Mission Control Portal, open Assistants and select Import assistant.
2. Choose Retell as the source and confirm your stored Retell API key.
3. Select the Retell multi-prompt agent you want to import.
4. Load available Retell agents and select the multi-prompt agent to import.
5. Review the generated Telnyx assistants and their handoff links.
6. 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