Web Call Test

Agent ID

Secret / API Key (for playground only — never embed in client-side code; use generateToken() on your backend)

Variables (JSON, optional)

Play Greeting (controls whether the AI speaks first)

FAB Text (optional — empty = icon-only round button)

Use a real campaign with FORM, authored A2UI or generated A2UI widget steps. Their presentation and view-only settings arrive on each transcript message; this playground does not invent server messages. Leave the theme override unchecked to inspect the campaign theme.

Theme Customization — builds a WidgetThemeConfig

General

Base

Font

FAB bg

FAB icon

Show FAB

Launcher / Pre-call

Collapsed bg

FAB text

CTA button bg

CTA button text

Frost X bg

Connecting circle

Finished divider

Background

Header bg

Header text

Chat bg

Bottom bg

Bottom border

Questions

Title

Secondary

Title size

Title align

Agent bubble

Agent text

Agent size

Agent align

Answers

Input

Input radius

Button bg

Button text

Button radius

Outer transcript card (independent of nested A2UI Cards)

Customize inline card surface

Card bg

Card text

Card border

Card radius

Resting shadow

Selected

Unselected

Indicator

Selector size

Selector align

User bubble

User text

User size

User align

Override with this theme at load (unchecked lets the agent-configured theme from /web-call/config apply instead)

Embed Snippet

Setup

Update Theme at Runtime

Theme Customization — builds a WidgetThemeConfig

SDK Methods

SDK Events

Live Transcript

Event Log