# TanStack AI AG-UI Protocol

> Server AG-UI SSE/NDJSON. Not CopilotKit client

**Subcategory:** TanStack  
**License:** MIT  
**Source:** https://github.com/TanStack/ai/blob/main/skills/ai-core/ag-ui-protocol/SKILL.md

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## When it is useful

Expose TanStack AI as a server AG-UI protocol over SSE or NDJSON. Not CopilotKit client widgets. Not chat-experience UI. Pinned 0.42.0.

## The Catch

Server AG-UI SSE/NDJSON, not CopilotKit client. Distinct from chat-experience. OSS SDK 0 USD; provider keys still required. Pinned 0.42.0.