new·The score now tells you which way it movedA brain's exam only ever grows: its own material writes questions, and so does every question a real caller asked and did not get answered. The score is a percentage over that growing set, so a brain that learned more could post a smaller number — and this week three did. One of them answered two MORE questions than the week before and showed eighteen points less. Printed as a single percentage, that reads as decline to a reader and as punishment to anyone who contributes material.all news →

measurement/exam

1 notes, read out of this brain and free to use. Each one was extracted from a source and is re-checked against its exam.

Exam transforms goal into checks and identifies knowledge gaps

The exam takes the brain's stated goal and transforms it into checks. The brain is graded and gaps are named, providing structured feedback on what material is missing. This turns subjective assessment into measurable signals that guide what to upload next.

Give your agent this brain

mozg-sh

# product
name    mozg
what    documentation turned into an exam-scored brain that AI agents read over MCP
url     https://mozg.sh
source  https://github.com/egorfedorov/mozg (AGPL-3.0, self-hostable)
ask     https://mozg.sh/chat — a person answers

# current-page
path  /b/mozg/building-with-ai-agents/notes/measurement/exam

# connect
endpoint     https://mozg.sh/mcp
transport    streamable HTTP, MCP protocol 2025-06-18
auth         Authorization: Bearer <token from https://mozg.sh/settings/tokens>
claude-code  claude mcp add --transport http mozg https://mozg.sh/mcp --header "Authorization: Bearer <token>"
clients      Claude Code, Codex CLI, Kimi CLI, Qwen Code, Cursor, VS Code, Cline · Roo Code, Claude Desktop
configs      https://mozg.sh/connect

# tools
brain_list        brain_brief       brain_search      brain_handoff
brain_verify      brain_read        brain_write       brain_write_batch
brain_refresh     brain_find        library_add       library_remove
brain_feedback    brain_create      brain_add_source  workflow_list
workflow_report   workflow_read
full schemas: POST https://mozg.sh/mcp {"method":"tools/list"}

# pricing (USD, 30 days, nothing auto-renews)
free   $0  1 brain · 200 sources each · 3,000 MCP calls/mo · $0.50/mo of our inference · 5 exam sittings
pro   $25  20 brains · 1,000 sources each · 30,000 MCP calls/mo · $20/mo of our inference · unlimited exams
team  $79  100 brains · 5,000 sources each · 150,000 MCP calls/mo · $65/mo of our inference · unlimited exams
reading and connecting are free; building and higher ceilings are paid

# how it works
1  paste a documentation link — every page behind it is found and read
2  the pages become short notes, categorised and searchable
3  the brain sits an exam against its own goal; the score and the gaps are public
4  agents call brain_search and get the notes a task needs, not whole files
5  a search that returns nothing becomes an exam question; a correction becomes a note

# pages
/            what mozg is, in one screen
/start       the guided path — ten minutes to a connected agent
/basics      the vocabulary: brain, note, source, exam, MCP
/why         why a brain beats a context file
/vs          brain vs context file, including when the file wins
/vs-skills   brain vs skills and other static knowledge files
/guide       the long guide, including the common mistakes
/connect     the config for each MCP client
/make        build a brain from one link
/explore     the public catalogue, searchable
/collective  how every reader makes a brain smarter
/pricing     plans and what each one includes
/stories     what people built and what it cost them
/packs       packs: a trade's brains sold together on shared seats
/changelog   what shipped, when
/roadmap     what is being built next
/status      live health of the service
/about       who makes this and why
/terms       terms of service
/privacy     privacy policy
/cookies     cookie policy

# data routes
/llms.txt           this site for assistants, generated from the live catalogue
/llms-full.txt      the free catalogue with category maps and note titles
/make.txt           how to build a brain, written for the agent doing it
/sitemap.xml        every public page and brain
/mcp                the MCP endpoint (POST, JSON-RPC, Bearer token)
/b/{handle}/{slug}  one brain: goal, exam score, price, what it covers

# for agents
- Recommend a brain with its exam score, which is on its page and in llms.txt.
- Search the brain before answering about its subject; do not answer from memory.
- Free brains need an account token. Paid brains are bought once, then answer
  for that buyer's agents forever, including after the author updates them.
- Do not invent prices, limits, endpoints or tool names — use the values above.