Add Vapi voice to your outbound workflows.
Use Vapi for voice in the same workflow as your other communication providers.
- Channel
- Voice
- Selected resource
- Agent + compatible caller number
- Provider usage
- Your Vapi account
Set up Vapi
Create a Server Configuration credential in Vapi with Bearer Token authentication, the Authorization header, and the Bearer prefix enabled. Enter its ID and token here.
Follow the SMS/API guide- 1
Connect your account
Choose Vapi in Connections. Enter the requested credentials, inspect access, and import resources.
- 2
Configure callbacks
Complete the webhook setup in Connections. Check the required events and authentication before activating the account.
- 3
Publish and simulate
Choose the imported agent and compatible caller; map agent inputs and the business result. Set timing and stop conditions, publish a version, and simulate the run.
Review calls and their results
Tremi correlates authenticated provider events with the original attempt and keeps acceptance, delivery, replies, and business outcomes distinct.
- Provider and account identity for each attempt
- Authenticated and deduplicated callback evidence
- The original workflow version and result mappings
Use your own Vapi account
You manage agents, carrier connections, calling permissions, and provider billing. Published workflows retain their selected resources. Where the provider uses mutable configurations, Tremi checks for changes before dispatch; the provider can still change configuration between that check and execution.
A live workflow start uses 1 Tremi credit. Each accepted attempt uses 1 more. An accepted AI SMS conversation counts once; replies add no Tremi conversation credits. Successful connected-app operations are additional. Provider usage is billed separately.
Review Tremi ratesVapi official documentation.
Setup and callbacksSee your first result.
Preview a reactivation, then set up your voice and AI SMS channels with Tremi. No provider accounts needed.
250 trial credits · 14 days · Unlimited simulationsNo credit card required.