obsidian-second-brain (eugeniughelbur/obsidian-second-brain) is an MCP server listed on the M8ven Trust Index. It scores 89 out of 100, grade B. It declares 10 tools. No publisher has claimed this listing.

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B
Caution
89/100
27 days ago

obsidian-second-brain

Persistent memory for Claude Code and 6 other CLI agents, stored as plain markdown in your Obsidian vault. Stop re-explaining your projects, decisions and people every session. 45 commands: hybrid semantic search, self-rewriting notes, key-less web research, and scheduled agents that maintain the vault while you sleep.

→ eugeniughelbur/obsidian-second-brain· listed on github_code

Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

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Who stands behind it

eugeniughelbur

Source: github_code

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// key findings
🚨
Secret credentials may flow to a network call
7 flows detected: OBSIDIAN_EMBED_KEY, TELEGRAM_JOURNAL_BOT_TOKEN, OPENAI_API_KEY. We can’t prove the destination matches the brand the credential belongs to.
🔐
You'll be asked for 9 credentials: ANTHROPIC_API_KEY, OBSIDIAN_EMBED_KEY, TELEGRAM_JOURNAL_BOT_TOKEN, OPENAI_API_KEY, XAI_API_KEY, TAVILY_API_KEY, BRAVE_API_KEY, PERPLEXITY_API_KEY, GEMINI_API_KEY
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
configCLAUDE_PLUGIN_ROOT
configOBSIDIAN_VAULT_PATH"env": { "": "/path/to/your/vault" }
configOBSIDIAN_RECALL_ENABLED
configXDG_CONFIG_HOME
configOBSIDIAN_NO_STAR_PROMPT
🔐 secretANTHROPIC_API_KEY
configOBSIDIAN_VAULT
configOBSIDIAN_SEARCH_DEWEIGHT
configOBSIDIAN_SEARCH_LOG_WEIGHT
configOBSIDIAN_SEARCH_ENTITY_BOOST
configOBSIDIAN_SEARCH_STATUS_FADE
configOBSIDIAN_SEARCH_LENGTHNORM
configOLLAMA_URL
configOBSIDIAN_EMBED_MODEL
configOBSIDIAN_EMBED_BACKEND
configOBSIDIAN_EMBED_URL
🔐 secretOBSIDIAN_EMBED_KEY
configOBSIDIAN_SEARCH_SEMANTICKnobs: =0 disables the layer entirely. The index file is large and regenerable - gitignore it.
configOBSIDIAN_RRF_SEMANTIC_WEIGHT
configOBSIDIAN_RRF_LEX_DEPTH
configOBSIDIAN_INDEX_STALE_WARN_PCT
configOBSIDIAN_SEARCH_MAX_FILES
configOBSIDIAN_ENV_FILE
configOBSIDIAN_SCAN_CACHE_CHARS
configOBSIDIAN_COMMANDS_DIR
🔐 secretTELEGRAM_JOURNAL_BOT_TOKEN
🔐 secretOPENAI_API_KEY[platform.openai.com](https://platform.openai.com/api-keys) /podcast Whisper transcription (optional, falls back to show-notes if unset) ~$0.006/min
configVAULT_OWNER
configWHISPER_HINT
configTRANSCRIBE_BACKEND
configWHISPER_LOCAL_MODEL
configWHISPER_BIN
configVAULT_PATH
configUV_BIN
🔐 secretXAI_API_KEY[console.x.ai](https://console.x.ai) /x-read, /x-pulse, /research-deep X pulse, /youtube summary Pay-per-use, ~$0.05/call
configRETRIEVAL_EVAL_EXTERNAL_CMD
configOBSIDIAN_EMBED_EXCLUDE
🔐 secretTAVILY_API_KEY
🔐 secretBRAVE_API_KEY
🔐 secretPERPLEXITY_API_KEY[perplexity.ai/settings/api](https://perplexity.ai/settings/api) /research, /research-deep Pay-per-use, ~$0.02-$0.50/call
🔐 secretGEMINI_API_KEY
configRESEARCH_AUTOOPENAuto-open after every save. Obsidian pops open at the new note. Disable with =0 if you're running batch saves.
// quality suggestions

Tool annotations

No tools have read-only/destructive annotations

Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.

All four hints declared on every tool

10/10 tools missing one or more hints — obsidian_search (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); obsidian_read_note (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); obsidian_save_note (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +7 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

Tool test coverage

3/10 tools referenced in tests (30%)

Write tests that reference each tool by name so every tool has at least one test.

Secrets stay with their owner

2 secret/sensitive values flow into network calls (OBSIDIAN_EMBED_KEY → dynamic, OBSIDIAN_EMBED_KEY → dynamic) (5 other flows matched canonical API hosts)

Audit where credentials are sent. A NOTION_TOKEN should only reach api.notion.com — never a third-party host.

Secrets not logged

2 secret values sent to console.log

Redact or omit secret values from log output.

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 5 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Verified](https://m8ven.ai/badge/mcp/eugeniughelbur/obsidian-second-brain?variant=verified)](https://m8ven.ai/mcp/eugeniughelbur/obsidian-second-brain)
Shows verification status without the grade. Want the grade badge instead? Remove ?variant=verified from the URL.
commit: 4d5b6738d79cca0b222e7874798c039a0dfd53b3
code hash: 9d5e2dcec9253d914d5c5d4c5c785c1366616a05f63279c9c8c2f27fc92afeed
verified: 8/14/2026, 9:52:10 AM
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