@tanstack/ai-client

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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

We're looking for TanStack AI Partners to join our mission! Partner with us to push the boundaries of TanStack AI and build amazing things together.

LET'S CHAT

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 »