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Does LangChain have Function Calling?
YES
Tool calling is the framework. Human approval for sensitive actions on LangSmith.
Does LangChain have Function Calling?
LangChain supports Function Calling. Developers can define custom tools/functions that the AI can choose to invoke, returning structured JSON arguments to execute actions. LangChain is an open-source agent framework (LangChain, LangGraph, Deep Agents) with 350M+ monthly downloads. Tool calling is the framework. Human approval for sensitive actions on LangSmith.
- Tool
- 🦜 LangChain by LangChain
- Feature
- Function Calling · Developer
- Status
- Yes, requires free plan
- Notes
- Tool calling is the framework. Human approval for sensitive actions on LangSmith.
- Pricing
- Requires free plan.
- Source
- langchain.com
- Last verified
- 2026-09-02