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Does Claude Code have Function Calling?
YES
Built-in tools plus MCP and the Agent SDK invoke structured tool calls.
Does Claude Code have Function Calling?
Claude Code supports Function Calling. Developers can define custom tools/functions that the AI can choose to invoke, returning structured JSON arguments to execute actions. Claude Code is Anthropic’s agentic coding tool. Built-in tools plus MCP and the Agent SDK invoke structured tool calls.
- Tool
- ⌨️ Claude Code by Anthropic
- Feature
- Function Calling · Developer
- Status
- Yes, requires pro plan
- Notes
- Built-in tools plus MCP and the Agent SDK invoke structured tool calls.
- Pricing
- Requires Pro plan.
- Source
- docs.anthropic.com
- Last verified
- 2026-08-21