Instructor vs Anthropic MCP

FeatureInstructorAnthropic MCP
CategoryAI DevelopmentAI Development
PricingFree (open-source)Free (open standard)
GitHub Stars9,00045,000
PlatformsLinux, macOS, WindowsmacOS, Linux, Windows
Features
  • ✓ Structured output
  • ✓ Pydantic models
  • ✓ Retry logic
  • ✓ Streaming
  • ✓ Multi-provider
  • ✓ Universal tool protocol
  • ✓ Server/client architecture
  • ✓ Stdio and SSE transport
  • ✓ TypeScript + Python SDKs
  • ✓ Growing ecosystem
Tags
structured-outputpydanticpythonopen-source
open-sourceprotocoltoolsintegrationstandard