Reference vs notebook mode

Mode What you give the AI API key? Example
Reference A read URL to a published guide No (if public + AI-readable) "Answer using https://guides.co/g/my-corpus/gdf"
Notebook GDF API or MCP Yes (or OAuth for ChatGPT App) "Import this corpus and keep it updated"

Reference - read-only context; good for RAG fetch benchmarks when your agent already has an HTTP tool.

Notebook - read + write; good for building the corpus, scaffolding sections, and agent-maintained knowledge.

Which app?

Platform Notebook setup
ChatGPT App Install Guides → OAuth at mcp.guides.co
ChatGPT Custom GPT Actions → OpenAPI + Bearer key
Gemini Google AI Studio + OpenAPI
Claude / Cursor Local MCP + Bearer key