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B4 Index

Independent build-vs-buy index: score software categories BUILD/BUY/BRIDGE/BEWARE.

Otherv3.3.0

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OpenAI Agents SDK vs MCP: Which Should You Build With?The OpenAI Agents SDK and MCP are not competing standards. OpenAI added native MCP support to the Responses API in May 2025. This guide shows when to use SDK built-in tools, when MCP server portability matters, and how to wire both together in the same agent.Read articleMCP Server Directories Compared: Glama, Smithery, mcp.so, MCPFind, and MoreSix MCP directories have emerged since the protocol launched, and they are not interchangeable. Glama leads on scale and grading. Smithery adds hosting. The official registry is a machine API, not a browsable UI. MCPFind optimizes for fast client-specific installation. This comparison breaks down what each directory actually does well.Read articleOpen-Source vs Commercial MCP Servers: 2026 ComparisonMCPFind indexes 12,194 MCP servers, and the vast majority are open source. But commercial options from Stripe, Shopify, and BankSync are growing. This comparison breaks down the real trade-offs across cost, security, maintenance, and licensing.Read article