White-Label Voice for SaaS Products
Ship voice as a feature in your SaaS product. Per-customer persona, per-customer phone number, per-customer billing — Guava is invisible to the end user.
Why this matters
Embed Guava in your AI stack. Your prompts, your data, our voice infrastructure. Sub-1s latency. WebRTC + SIP. Compliance you can hand to your enterprise buyer. This example shows you how to automate white-label voice for saas products calls end-to-end with Guava's SDK — no telephony plumbing, no prompt engineering, just Python.
Installation
Install from Guava's private PyPI index. A public package is coming soon — the install command will simplify to pip install guava.
# Step 1: Install Guava
pip install gridspace-guava --extra-index-url https://guava-pypi.gridspace.com
# Public PyPI package coming soon — the install command will simplify to:
# pip install guava
# Step 2: Set your credentials
export GUAVA_API_KEY="..."
export GUAVA_AGENT_NUMBER="..."How it's built
Every Guava agent is a Python class. Walk through the key sections below, then grab the complete file at the end.
Imports
Import the Guava SDK and any helpers you need. guava.CallController is the base class for every voice agent.
# Install: pip install gridspace-guava --extra-index-url https://guava-pypi.gridspace.com
import guava
import osAgent setup
set_persona() defines how the agent presents itself. set_task() gives it its mission in plain English. The checklist drives the conversation — Guava works through it top-to-bottom, collecting Field values and speaking Say items as it goes.
class WhiteLabelAgent(guava.CallController):
def __init__(self, customer_org: str, customer_voice: str, app_callback_url: str):
super().__init__()
self.app_callback_url = app_callback_url
self.set_persona(
organization_name=customer_org,
agent_name="Sage",
voice=customer_voice,
)
self.set_task(
objective=f"Handle voice interactions on behalf of {customer_org}",
checklist=[
f"Greet the caller as a {customer_org} agent.",
guava.Field(
key="caller_name",
field_type="text",
description="Caller's first name",
),
guava.Field(
key="request",
field_type="text",
description="What the caller wants to accomplish",
),
"Confirm what you've captured and let them know what happens next.",
],
on_complete=self.notify_app,
)
def notify_app(self, fields):
"""Post the structured call summary back to the SaaS customer's webhook."""
import requests
requests.post(
self.app_callback_url,
json={"call_summary": fields, "call_id": self.call_id},
headers={"X-Guava-Signature": guava.sign(fields)},
timeout=5,
)
# A SaaS product spins up Guava for each customer on signup
def onboard_customer(org_name: str, voice_choice: str, webhook_url: str):
guava.listen(
controller=WhiteLabelAgent,
controller_args={
"customer_org": org_name,
"customer_voice": voice_choice,
"app_callback_url": webhook_url,
},
agent_number=guava.provision_number(area_code="415"),
api_key=os.environ["GUAVA_API_KEY"],
)
onboard_customer(
org_name="Lakeside Veterinary Clinic",
voice_choice="warm-female-en-us",
webhook_url="https://app.your-saas.com/webhooks/lakeside/voice",
)Platform performance
<1s
Response time
99.99%
Uptime SLA
13+
Industries served
Full example
The complete file — copy it, save it as example.py, and run it.
# Install: pip install gridspace-guava --extra-index-url https://guava-pypi.gridspace.com
import guava
import os
class WhiteLabelAgent(guava.CallController):
def __init__(self, customer_org: str, customer_voice: str, app_callback_url: str):
super().__init__()
self.app_callback_url = app_callback_url
self.set_persona(
organization_name=customer_org,
agent_name="Sage",
voice=customer_voice,
)
self.set_task(
objective=f"Handle voice interactions on behalf of {customer_org}",
checklist=[
f"Greet the caller as a {customer_org} agent.",
guava.Field(
key="caller_name",
field_type="text",
description="Caller's first name",
),
guava.Field(
key="request",
field_type="text",
description="What the caller wants to accomplish",
),
"Confirm what you've captured and let them know what happens next.",
],
on_complete=self.notify_app,
)
def notify_app(self, fields):
"""Post the structured call summary back to the SaaS customer's webhook."""
import requests
requests.post(
self.app_callback_url,
json={"call_summary": fields, "call_id": self.call_id},
headers={"X-Guava-Signature": guava.sign(fields)},
timeout=5,
)
# A SaaS product spins up Guava for each customer on signup
def onboard_customer(org_name: str, voice_choice: str, webhook_url: str):
guava.listen(
controller=WhiteLabelAgent,
controller_args={
"customer_org": org_name,
"customer_voice": voice_choice,
"app_callback_url": webhook_url,
},
agent_number=guava.provision_number(area_code="415"),
api_key=os.environ["GUAVA_API_KEY"],
)
onboard_customer(
org_name="Lakeside Veterinary Clinic",
voice_choice="warm-female-en-us",
webhook_url="https://app.your-saas.com/webhooks/lakeside/voice",
)Run it
Start the agent. It will connect to Guava's infrastructure and begin accepting calls on your assigned number.
python example.py