Tool Calling

Implement AI tool calling in Next.js using the Vercel AI SDK's tool() function. Give your LLM the ability to call external APIs, run calculations, or query databases — and render the results right in the chat UI. The definitive pattern for function calling with structured typed inputs.

• Weather lookups, stock prices, or any real-time data API
• Database queries or CMS content retrieval from the LLM
• Code execution and interpreter patterns for AI assistants
• Multi-tool agent loops with sequential tool invocations