Cursor launched a full MCP Marketplace; Devin supports hundreds of MCP servers (Asana, Zapier, Notion, Datadog, Snowflake, etc.); Factory.ai is 'vendor-agnostic' with tool extensibility. SaaS Factory's agents use hardcoded tools in tools.ts (41KB) but there is no way for a user to add external tool integrations to the agent pipeline. The codebase has env-vars management and Vercel integration but no plugin/MCP layer. As MCP becomes the industry standard for AI tool use, not supporting it means agents can't connect to the tools users already use (Notion, Linear, Jira, Datadog). The architecture.md notes tools.ts as the agent tool layer — a pluggable MCP registry would fit naturally there.