TanStack AI

A powerful, type-safe AI SDK for building AI-powered applications.

• Provider-agnostic adapters (OpenAI, Anthropic, Gemini, Ollama, etc.)
• Multimodal content support - Send images, audio, video, and documents
• Chat completion, streaming, and agent loop strategies
• Headless chat state management with adapters (SSE, HTTP stream, custom)
• Isomorphic type-safe tools with server/client execution
• Enhanced integration with TanStack Start - Share implementations between AI tools and server functions

Read the docs →

Bonus: TanStack Start Integration

TanStack AI works with any framework (Next.js, Express, Remix, etc.).

With TanStack Start, you get a bonus: share implementations between AI tools and server functions with createServerFnTool:

import { createServerFnTool } from '@tanstack/ai-react'

// Define once, get AI tool AND server function (TanStack Start only)
const getProducts = createServerFnTool({
  name: 'getProducts',
  inputSchema: z.object({ query: z.string() }),
  execute: async ({ query }) => db.products.search(query),
})

// Use in AI chat
chat({ tools: [getProducts.server] })

// Call directly from components (no API endpoint needed!)
const products = await getProducts.serverFn({ query: 'laptop' })

No duplicate logic, full type safety, automatic validation. The serverFn feature requires TanStack Start. See docs for details.

Get Involved

• We welcome issues and pull requests!
• Participate in GitHub discussions
• Chat with the community on Discord
• See CONTRIBUTING.md for setup instructions

Partners

Explore the TanStack Ecosystem

• TanStack Config – Tooling for JS/TS packages
• TanStack DB – Reactive sync client store
• TanStack Devtools – Unified devtools panel
• TanStack Form – Type‑safe form state
• TanStack Pacer – Debouncing, throttling, batching
• TanStack Query – Async state & caching
• TanStack Ranger – Range & slider primitives
• TanStack Router – Type‑safe routing, caching & URL state
• TanStack Start – Full‑stack SSR & streaming
• TanStack Store – Reactive data store
• TanStack Table – Headless datagrids
• TanStack Virtual – Virtualized rendering

… and more at TanStack.com »