Memex

Name: Memex
Author: evan-moon

by evan-moonversion 0.5.0i★ –iRuns on your computer

Registry nameio.github.evan-moon/memex

Install

Overview

Description from the maker (original English)

Local-first second brain with semantic search. Markdown notes indexed by a local ML model.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Docs, sheets & office work

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
The registry lists no key to fill in.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "memex": {
      "command": "npx",
      "args": [
        "-y",
        "@evan-moon/memex"
      ]
    }
  }
}

Run this in your terminal

claude mcp add memex -- npx -y @evan-moon/memex

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "memex": {
      "command": "npx",
      "args": [
        "-y",
        "@evan-moon/memex"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "memex": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@evan-moon/memex"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account evan-moon, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Docs, sheets & office worki

More stars than 0% of the other 2187 servers in this category
Published to the registry more recently than 18% of the other 2187 servers in this category
Basic checks equal to or better than 100% of the other 2187 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Memex safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.5.0) reached the registry 4 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Agent-Native Calendar, Excel MCP Server, MCP Server for Excel

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Agent-Native Calendar

by BuilderIO

Agent-Native Google Calendar - manage events, sync, and public booking

Runs in the cloud★ 7,620MITUpdated 2 months ago

Install

Excel MCP Server

by haris-musa

Lets AI create and edit Excel files itself, including formulas, charts and PivotTables, without Excel installed.

Runs on your computer★ 4,276MITUpdated 6 days ago

Install

MCP Server for Excel

by sbroenne

Excel automation for AI - Sheets, Power Query, DAX, VBA, Tables, Ranges and more. Windows only.

Runs on your computer★ 847MITUpdated 3 days ago

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

memex

Make Claude smarter about you.

npm install -g @evan-moon/memex

Make Claude smarter about you.

Local-first second brain that connects to Claude via MCP. Notes are stored as plain Markdown and indexed with a local ML model, fully offline, no API keys, nothing leaves your machine.

The problem

Claude is only as smart as what's in the conversation. Your decisions, your context, your thinking, invisible unless you paste them in every time.

You:    What did we decide about the auth approach last sprint?

Claude: I don't have context from previous conversations...

The fix

You:    What did we decide about the auth approach last sprint?

Claude: [memex · search_notes · "auth approach decision"]

Found 2 notes:

Auth Architecture Decision Apr 14 #auth #backend ───────────────────────────────────────────────────── Chose JWT + refresh tokens over sessions. Rationale: stateless design fits horizontal scaling plan.

Based on your April 14th note: you went with JWT + refresh tokens. Tom also flagged keeping auth decoupled from payment logic, separate bounded contexts.

Claude searches your notes before answering and saves insights at the end of every conversation, automatically, without being asked.

Install

npm install -g @evan-moon/memex

Connect your apps:

memex mcp install

This registers memex with every MCP client on this machine — Claude, Claude Code, Codex, Cursor — by writing each one's own config file. Restart the clients afterwards.

That's it. On first run, the embedding model (~450MB) downloads once to ~/.memex/models/.

Auto-recall (optional)

memex recall install

Turns retrieval from something Claude has to *decide* to do into something that just happens. Every prompt you type is semantically searched against your notes, and the top 3 titles are injected as context before Claude answers — the same way native memory works. Claude then pulls full notes with get_note when a title looks relevant.

A background daemon keeps the embedding model warm (~/.memex/recall.sock), so a lookup costs ~30ms instead of the ~1.5s a cold CLI search spends loading the model. It idles out after 2 hours.

Cost: ~200MB resident while warm, plus up to 3 note titles of context per prompt. Remove with memex recall uninstall.

Features

Semantic search, finds notes by meaning, not just keywords. Multilingual (Korean + English), runs fully offline via multilingual-e5-base
Hybrid retrieval, vector search + BM25 full-text + tag matching, fused via Reciprocal Rank Fusion
Chunk-level embeddings, long notes are split into ~340-token passages and embedded individually, so an answer buried on page three is as findable as one in the opening paragraph. Search returns the passage that matched, not the note's first lines
Cross-encoder reranking (opt-in, MEMEX_RERANK=1), retrieves twice as many candidates and reorders them with bge-reranker-v2-m3. Worth ~+20pp hit@1 on the golden set, at ~1.8s per search — off by default because auto-recall and the CLI are built around instant lookups
Date filter, narrow search to a time range with --from / --to
Note layers, every note is past (immutable record), state (mutable plan), or rule (Claude behaviour guide). Past notes refuse updates; rule notes auto-inject into Claude's system prompt
Flashback, save and search automatically surface older notes from a *different folder* that are semantically related, "you wrote about this 124 days ago in a different context"
Inference engine, deterministic *signals* surface un-synthesized patterns (cross-year arcs, stale state notes, tag revivals); you promote good ones into *inferences* (hypotheses with provenance) that auto-invalidate when their source notes change. No LLM in the core
MCP server, Claude searches and saves automatically. No extra CLAUDE.md setup needed
Auto-recall, opt-in hook that searches your notes on every prompt and injects the hits before Claude answers, so recall never depends on Claude remembering to look
Duplicate detection, save_note warns when a semantically similar note already exists, nudging Claude to update rather than create
Backlinks, link notes with [[Title]] syntax; get_note shows which notes reference it
Series collapse, a dated work log ("… 2026-07-20", "… 2026-07-23") takes at most two slots on a result page, and search reports how many more it held back
Amendments, a correction records what it corrects (amends), so search flags the superseded note and points at the newest fix instead of returning a claim you already know is wrong
Digest, memex digest summarises notes saved in the last N days, grouped by folder
CLI, add, search, tag, browse, and index notes from the terminal
Obsidian-compatible, notes saved as .md files; works alongside existing vaults
Local DB, SQLite + sqlite-vec at ~/.memex/memex.db

CLI

# Add notes

memex add # interactive prompt (asks for layer) memex add --title "Note title" --content "..." --layer past memex add --title "Note title" --file ./note.md --layer state memex add --title "Note title" --content "..." --folder work/people/tom --layer past memex add --title "Note title" --content "..." -T typescript -T architecture --layer past

Layers

memex layer # distribution of past / state / rule memex layer state # move a note to a different layer

Search

memex search "semantic search query" # multilingual memex search "knowledge management" --limit 10 # multilingual: matches Korean/Japanese notes too memex search "query" --tag typescript # filter by tag memex search "query" --from 2026-04-01 # notes since a date memex search "query" --from 2026-04-01 --to 2026-04-30

Browse

memex list # recent 10 notes memex list --limit 20 memex show memex tags # all tags with counts memex related # semantically related notes memex digest # last 7 days + signals + inferences memex digest --days 30 # summary of last 30 days

Insights (inference engine)

memex signals # detect un-synthesized patterns memex signals --type hidden_arc # one type only memex signals dismiss # triage (also: snooze) memex signals mint # print evidence bundle to synthesize memex signals mint --title "..." --summary "..." --confidence 0.7 memex inferences # list inferences (auto-flags stale) memex schedule # print cron/launchd snippet (no daemon)

Edit / delete

memex edit memex delete memex delete --yes # skip confirmation

Index external directories

memex source add ~/Documents/My\ Notes # register a vault memex source list memex source remove ~/Documents/My\ Notes memex index # scan vault + all sources memex index --force # re-index everything memex reembed # re-embed with current model

Config

memex config show memex config set vault-path ~/Documents/Second\ Brain

MCP

memex mcp install # register with every MCP client on this machine

Auto-recall

memex recall install # search notes on every prompt, inject hits memex recall uninstall # remove the hook memex mcp path # print MCP binary path

MCP server

Claude, Claude Code, Codex, Cursor

memex mcp install

It writes each client's own config file and leaves the servers already in it alone. If a client still runs an older copy of memex, it gets repointed. memex mcp path prints the server path for a client memex does not know about yet.

Available tools

Tool	Description
`save_note`	Save a note, requires `layer`, warns if a similar note already exists, surfaces flashbacks
`search_notes`	Semantic search; supports `category`, `tag`, `date_from`, `date_to` filters; appends flashbacks for the top result
`list_notes`	List recent notes
`list_tags`	List all tags with note counts
`list_folders`	List all folders with note counts
`get_note`	Get full content and backlinks of a note by ID
`update_note`	Update title or content. Refuses `past` notes (with `[Amendment]` suggestion) and `rule` notes (user-only)
`delete_note`	Delete a note by ID
`get_signals`	Deterministic un-synthesized patterns (hidden_arc / stale_state / dangling_link / tag_burst)
`update_signal_status`	Triage a signal, dismiss or snooze
`list_inferences`	List synthesized hypotheses (re-checks staleness first)
`get_inference`	One inference with full provenance + change/delete markers
`mint_inference`	Persist an approved hypothesis, requires explicit confirmation

Inferences are kept separate from notes (excluded from search) and are cited as hypotheses, never facts. Detection stays deterministic; the only LLM step is synthesizing an inference's summary, which Claude does, never memex.

Note layers

Every note is classified into one of three layers based on mutability:

Layer	Meaning	Claude's permission
`past`	Record of what happened, retros, meetings, decision rationale, debugging sessions	Append-only. `update_note` refuses, suggesting an `[Amendment]` note instead
`state`	Current state or plans, project progress, roadmaps, a person's current role	Freely updatable
`rule`	Behaviour guide for Claude, coding style, search policy	Claude is read-only. Only the user writes

The CLI prints a colour-coded [past] / [state] / [rule] badge next to each note in list, search, and show.

save_note (MCP) and memex add (CLI) require an explicit layer. The classification rules are documented in the tool description so Claude picks correctly.
On first run, existing notes get a folder-based backfill: projects/dev/herald → state, coding → rule, everything else → past. Migration is idempotent.
rule notes are also auto-injected into the MCP server's instructions, see Rule layer auto-inject below.

Flashback

When you save a note or search, memex automatically surfaces older notes from a different folder that are semantically similar, "you wrote about this 124 days ago in a different context." Stored as system-generated backlinks (note_links.source = 'flashback'), separate from your [[wikilinks]] (source = 'wiki').

Tune via env:

Env	Default	Behaviour

| `MEMEX_FL

Only the beginning is shown; read the rest in the repo

Memex

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Docs, sheets & office worki

Common questions

Alternatives

Agent-Native Calendar

Excel MCP Server

MCP Server for Excel

README from the maker

The problem

The fix

Install

Auto-recall (optional)

Features

CLI

Layers

Search

Browse

Insights (inference engine)

Edit / delete

Index external directories

Config

MCP

Auto-recall

MCP server

Claude, Claude Code, Codex, Cursor

Available tools

Note layers

Flashback