# VoltAgent Core Reference

> VoltAgent class: constructor, lifecycle, runtime

**Subcategory:** VoltAgent  
**License:** MIT  
**Source:** https://github.com/VoltAgent/skills/blob/main/skills/voltagent-core-reference/SKILL.md

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## When it is useful

Look up VoltAgent class constructor options, lifecycle methods, and runtime behavior.

## The Catch

Loud: Core Framework Free forever MIT $0 (memory/RAG/guardrails/tools/MCP/voice/workflows). VoltOps Developer Free $0/mo (1 seat / 250 traces / 7-day retention); Core $50 / Pro $250. LLM BYOK. Skills MIT LICENSE 200. Distinct from Mastra (live gem), LangChain/LangGraph, Letta/CrewAI, Vercel AI SDK. CK VOID — do not restack MongoDB. Frontmatter name voltagent-core-reference.