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Up to five buttons. Clicks arrive as interaction events.
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string
required
"button_group"
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array
required
1–5 buttons. More returns BUTTONS_TOO_MANY.
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boolean
default:"true"
When true, one click turns off the whole group and marks the clicked button. Set false for actions people repeat, like “Refresh”.

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The button object

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string
required
What kind of action this is. Must match ^[a-zA-Z0-9_.:-]{1,64}$ and be unique in the message. If you leave it out, we build it from label.
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string
required
Plain text, 1–40 characters.
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string
Your data, up to 2,000 characters. We never read it. It comes back exactly as sent when clicked.
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string
default:"secondary"
primary, secondary, or danger.
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string
An https:// URL. This makes a link button: it opens a new tab, sends no event, and ignores value.
action_id says what kind of action (track_order). value says which one (4821). Both come back in the click event.
Buttons expire 30 days after the message is created. They also turn off once a human takes over the conversation.