Poku Labs is a proud Retell AI App Partner. You can add Poku’s API as a custom function in any Retell agent — giving your voice AI the ability to text customers, capture structured data, loop in a manager, and more.Documentation Index
Fetch the complete documentation index at: https://docs.pokulabs.com/llms.txt
Use this file to discover all available pages before exploring further.
Use cases
Email capture over SMS
Agent sends a text mid-call. Customer replies with their email. Agent reads it back and continues.
Form capture via WhatsApp
Agent sends a form link over WhatsApp. Customer fills it out on their phone while still on the call.
Loop in a manager
Agent texts a manager to check transfer availability before handing off — no dead air for the customer.
Quote approval via Slack
Agent pings a Slack channel for sign-off on a custom price, then relays the answer to the customer.
See it in action
Setup on Retell AI
Name and describe the function
The name and description can be anything — write them so your agent understands when to use the tool. For example:
send_sms, “Send an SMS to the customer and wait for their reply.”Set the API endpoint
Select POST and enter the Poku API URL for the action you want:
| Action | URL |
|---|---|
| Send SMS | https://api.pokulabs.com/messages/sms |
| Send WhatsApp | https://api.pokulabs.com/messages/whatsapp |
| Send Slack message | https://api.pokulabs.com/messages/slack |
Set the timeout
Set the function timeout to be equal to or longer than the
waitTime you plan to pass to Poku.Define the parameters
Under Form, add the parameters your agent will pass in the request body — for example 
to, message, and waitTime. These map directly to the Poku API fields.Configure execution feedback
Under During Execution:
- Talk After Action Completed — always enable this so your agent speaks after receiving the tool response
- Talk While Waiting — enable this if you want the agent to keep talking with the customer while waiting for the Poku response (e.g., to fill dead air)