kbrain

KBrain Concepts

Marketplace brains vs private brains

Understand the difference between marketplace brains and private brains in KBrain, and choose the right type for your knowledge, audience, and AI agent workflow.

Build your first knowledge brain

Create a brain

KBrain supports two ways to work with curated knowledge: marketplace brains and private brains. Both are served over MCP and work with the same AI agents. The difference is who can access them, and why you built them.

Marketplace brains

A marketplace brain is published for others to discover. If you have expertise in a domain, a methodology, a dataset, or a workflow, you can package it as a brain and make it available on the KBrain marketplace.

Marketplace brains work well for domain experts who want their knowledge to travel. A nutritionist can publish a brain on sports fueling. A security researcher can publish one on threat modeling. An economist can publish one on emerging market indicators. Each brain is queryable by any MCP compatible agent that subscribes to it.

Publishing a brain is not writing a book. It is making your expertise queryable. Any AI agent that subscribes can call your brain in context, alongside other knowledge sources.

Private brains

A private brain stays within your control. It is not listed on the marketplace and is not discoverable by others. Private brains are the right choice for internal team knowledge, personal data sources, sensitive context, or anything that should not be public.

A product team might keep a private brain of roadmap notes and decisions. A consultant might maintain one per client engagement. An athlete might have a private brain connected to personal training data. The context stays yours.

Which one to choose

  • Choose a marketplace brain when the knowledge is meant to be shared, discovered, and reused by others
  • Choose a private brain when the knowledge is internal, personal, or sensitive
  • You can start private and publish later once the brain proves useful to others
  • Most people use a mix of both

What stays the same

Regardless of type, both marketplace and private brains work over MCP, support the same agent workflows, and give you full ownership of the knowledge you put in them. The type only controls access, not capability.

Build your first knowledge brain

Subscribe to KBrain, create a brain from your expertise or your data, and make it available to Claude, ChatGPT, or any MCP compatible assistant.

Create a brain

Frequently asked questions

When should I use a marketplace brain?

Use a marketplace brain when the knowledge is intended for broader discovery and reuse. It is the right choice when you want others to find and benefit from your expertise.

When should I use a private brain?

Use a private brain for team knowledge, internal workflows, personal data sources, or any context that should not be publicly discoverable.

Can I switch from private to marketplace later?

Yes. You can start with a private brain to develop and refine the knowledge, then publish it to the marketplace when it is ready for broader use.

Do both brain types work with AI assistants?

Yes. Both marketplace and private brains are served over MCP and work with any compatible AI agent, including Claude and ChatGPT.