# Vercel adds streamed interface cards to Chat SDK agents

_Published Friday, November 6, 2026 at 7:06 PM EST · AI · Latest · Tier 2 — Notable_

![Vercel adds streamed interface cards to Chat SDK agents — Primary](https://assets.vercel.com/image/upload/contentful/image/e5382hct74si/7GBRL4iPtI99gtYPzGUJgT/89543d900cd8337eb22bb11c9712218c/image.png)

Vercel says Chat SDK agents can now stream generated interface cards using json-render. An agent writes a JSON specification from a defined component catalog, and adapters convert it into native messages such as Slack Block Kit or Teams Adaptive Cards.

The integration supports tables, charts and buttons, validates component properties, and updates messages as elements arrive, at most once every 500 milliseconds by default. Platform limits still apply: Slack's adapter converts a second table into a code block, while developers can instead configure the integration to reject specifications that exceed limits.

## Sources

- [Vercel News](https://vercel.com/changelog/json-render-and-chat-sdk-agents)

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Canonical: https://techandbusiness.org/newswire/T8l3nbDNwb1bDx7yMholts
Published: 2026-11-07T00:06:05.593Z
Story chronology: 2026-11-06T21:00:00.000Z
Retrieved: 2026-11-08T06:08:54.508Z
Publisher: Tech & Business (techandbusiness.org)