anthropics--knowledge-work-plugins/partner-built/zoom-plugin/skills/team-chat/concepts/message-structure.md

Message Card Structure (Chatbot API)

Chatbot messages use a card-like JSON structure (often called "message cards").

High-Level Shape

• content.head: title + optional subhead
• content.body: array of blocks
  • message blocks for text
  • fields blocks for key/value rows
  • actions blocks for buttons
  • attachments blocks for images/links

Where To Look

• Component reference: ../references/message-cards.md

Common Pitfalls

• Buttons must include a value you can route on when you receive an interaction webhook.
• Many issues that look like "Zoom didn't render my card" are just invalid JSON shape; validate your payload before sending.