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PopNx MCPMCP servers for people who use AI · explained in plain words

Recall

by j4ckxyzversion 0.1.4i★ –iRuns on your computer
Registry nameio.github.j4ckxyz/recall

Install

Overview

Description from the maker (original English)

Private, encrypted memory about you, shared by all your AI agents. Self-hosted; runs on a Pi.

PopNx MCP’s three pillars

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

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: Search & AI memory

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.

Which app do you use?

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

Download the maker’s .mcpb file

The link goes to the maker’s own file; we do not host or repackage it. Open the file and Claude Desktop installs it.

Run this in your terminal

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.

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 8, 2026

  • ✓ Pass

    Maker matches the repo

    The registry name was verified with the GitHub account j4ckxyz, 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 Search & AI memoryi

  • More stars than 0% of the other 5687 servers in this category
  • Published to the registry more recently than 72% of the other 5687 servers in this category
  • Basic checks equal to or better than 100% of the other 5687 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 Recall 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 (0.1.4) reached the registry 15 days ago.

Which apps can use it?

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

What can I use instead?

In the same category: Context7, Codebase Memory, Exa

Alternatives

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

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

Context7

Feeds AI the latest docs for libraries and frameworks before it answers, so code it writes does not use outdated, removed functions.

by upstashWidely used↓ 972.7K/wk★ 64.2KUpdated 2 days ago

Computer or cloud

Codebase Memory

Codebase knowledge graph for AI agents — 162 languages, sub-ms queries, 99% fewer tokens.

by DeusDataWidely used↓ 18K/wk★ 48.1KUpdated 22 days ago

Runs on your computer

Exa

Connect AI agents to Exa for web search, content fetching, and multi-step research.

by exa-labsGrowing★ 5.2KUpdated 2 months ago

Runs in the cloud✓ exa.ai

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.

Recall

A self-hosted memory of *you*, shared by every AI agent you use, over MCP.

  • One binary, 10 MB, embedding model included. No Python, no GPU, no network at runtime. ~13 MB RAM per agent connection. Runs on a Raspberry Pi.
  • Three tools: recall, remember, forget. Agents get facts and dates, never who saved them.
  • Fuzzy search: BM25 + static embeddings + typo repair, ~150 µs per query. Benchmarked against BM25, other embedding models and transformer embedders.
  • Secure by default: SQLCipher-encrypted store, secret scanner on every write, soft deletes with an audit trail, stdio-only unless you opt into HTTP with scoped tokens.
  • A map of your memory: a password-protected web app, built into the same binary at about 65 KB, to browse, search, edit and forget memories.
curl -fsSL https://github.com/j4ckxyz/recall/releases/latest/download/install.sh | sh

Install · Let an agent install it · Use it across devices · Web app · Design · Benchmarks

Why not just use ChatGPT or Claude memory?

Both are good at what they do. They take the same basic approach as Recall: short third-person facts, a compact profile in context, search on demand. Recall uses that approach but changes who owns the memory and where it works.

Where Recall is better

ChatGPT / Claude memoryRecall
Which agents can use itOnly that vendor's apps. ChatGPT's memory doesn't reach Claude, Cursor or your scripts, and vice versa.Every MCP client: Claude Code, Claude Desktop, Cursor, Codex, Gemini CLI, Zed, your own agents. Switch tools and keep your context.
Who holds the dataThe vendor's servers, under their retention and policy terms.Your disk, encrypted with your key (SQLCipher, AES-256). No account, and no network access at runtime.
Seeing what it knowsSaved memories are listable. Chat-history recall and synthesized summaries are paraphrased, and you can't fully inspect them.Every fact is a plain line with an id and a date. recall list shows all of it, and recall audit shows which agent wrote what and when.
When changes applyClaude's automatic summary refreshes on a 24-hour cycle.Immediately, for every agent.
DatesEvery memory carries when it was learned, including backfilled ones, so agents can tell old facts from current ones.
Mistakes and abuseWrites containing secrets or ID numbers are rejected. Forget and replace are reversible for 30 days. HTTP tokens can be read-only.
Context costA profile of about 1,500 tokens plus targeted search. Up to 5,000 facts without filling every prompt.
Lock-inExport is possible, but import depends on each vendor.recall export --json, MIT licence, one 10 MB binary.

Search quality is comparable. Hosted products don't publish their retrieval stack, so they can't be benchmarked directly. On our fact-retrieval benchmark, Recall's hybrid search (Recall@5 of 0.82) matches transformer embedding models such as bge-small (0.82) and MiniLM (0.85). It runs in about 150 µs with a 7.5 MB model and no ML runtime.

Where hosted memory still wins

  • No setup, and it works everywhere. ChatGPT and Claude memory work on phone and web with no install. Recall reaches web and mobile apps only through the HTTP mode behind TLS. OAuth support for ChatGPT-style remote connectors isn't built yet.
  • Passive learning from all your chats. ChatGPT's "reference chat history" and Claude's conversation search draw on everything you've said. Recall only knows what agents explicitly remember.
  • Tuned behaviour. Vendors train their models to use their own memory well. Recall depends on each client following its MCP instructions, and some clients follow them better than others.

In short: if you use one assistant, on your phone, and don't mind the vendor holding your memory, use theirs. If you use several agents, want the data on your own hardware, and want to see and control every fact, use Recall. You can also use both: run recall import on facts exported from ChatGPT or Claude.

Install

macOS / Linux / Raspberry Pi

curl -fsSL https://github.com/j4ckxyz/recall/releases/latest/download/install.sh | sh

Windows (PowerShell)

irm https://github.com/j4ckxyz/recall/releases/latest/download/install.ps1 | iex

Claude Desktop, one click: download recall.mcpb and open it. The bundle covers macOS, Windows and Linux. It creates your encrypted store on first launch, and you can optionally enter a shared Tailscale server.

MCP Registry: Recall is listed as io.github.j4ckxyz/recall, so clients that browse the official registry can install it directly.

The installer:

  1. Downloads the prebuilt binary for your platform and checks it against the release's SHA256SUMS. It stops if the checksum doesn't match.
  2. Installs it to ~/.local/bin (%LOCALAPPDATA%\Programs\recall on Windows).
  3. Creates your encrypted store and key in ~/.recall/.
  4. Runs recall doctor, a self-test of the model, search, the encrypted store and a real MCP handshake.
  5. Offers to add Recall to the agents it finds: Claude Code, Claude Desktop, Cursor, VS Code, Windsurf, Gemini CLI and Codex CLI.

Every release is installed and smoke-tested by CI before it's published, on macOS, Windows and Ubuntu (x64 and arm64), and in Debian 11 and 12, Fedora, Arch and Alpine containers. CI then re-runs the exact one-liners above against the published release. Linux binaries are static (musl), so they run on any distro, including 64-bit Raspberry Pi OS.

Prefer to read the script before running it? See install.sh and install.ps1. You can also build from source: cargo install --git https://github.com/j4ckxyz/recall --features vendored-openssl (drop the feature on macOS).

Back up `~/.recall/key`. Without it your memory cannot be decrypted. To keep the key in a password manager instead, set RECALL_KEY_CMD, for example RECALL_KEY_CMD='op read op://Private/recall/key'.

Or let an agent do it

Copy this into Claude Code, Codex, Cursor or any agent that can run commands:

Install Recall for me (https://github.com/j4ckxyz/recall). It's a self-hosted

MCP server that gives all my AI agents a shared, encrypted memory about me.

  1. Install it:
  • macOS/Linux: curl -fsSL https://github.com/j4ckxyz/recall/releases/latest/download/install.sh | RECALL_CONNECT=yes sh
  • Windows PowerShell: $env:RECALL_CONNECT='yes'; irm https://github.com/j4ckxyz/recall/releases/latest/download/install.ps1 | iex
  1. Run recall doctor and confirm it ends with "All checks passed". If anything fails, show me the failing line and stop.
  2. If ~/.local/bin isn't on my PATH, add it to my shell profile.
  3. Tell me which agents were connected and that I must restart them.
  4. Remind me to back up ~/.recall/key. Never print, copy or upload the key.
  5. Ask me whether I want to share one memory across my devices with Tailscale. If yes, follow "Use it across devices with Tailscale" in the README, and ask me which device should be the server before changing anything.

Connect your agents

recall connect adds Recall to every agent it detects, and keeps a .before-recall backup of any config file it edits. You can also name agents: recall connect cursor vscode. recall disconnect undoes it.

To configure an agent by hand, every client runs the same command: recall mcp.

{ "mcpServers": { "recall": { "command": "/full/path/to/recall", "args": ["mcp"] } } }
  • Claude Code: claude mcp add --scope user recall -- recall mcp
  • Codex CLI, in ~/.codex/config.toml: [mcp_servers.recall], then command = "recall" and args = ["mcp"]

Use it across devices with Tailscale

Recommended: run one Recall server on an always-on machine (a Raspberry Pi, home server or desktop), and point every other device at it over your Tailscale tailnet. All your agents, on every device, then share a single memory, and none of it is reachable from the public internet.

 laptop agents ─┐                                  ┌─ Raspberry Pi

desktop agents ─┼── recall mcp ── tailnet (WireGuard) ──► recall serve --tailscale work agents ─┘ (relays stdio) └─ encrypted store

1. On the server (after installing Recall and Tailscale):

recall token add laptop          # one token per device; --read-only for read-only devices

recall serve --tailscale # listens on this machine's tailnet IP only, port 7878

To keep it running at boot on Linux:

mkdir -p ~/.config/systemd/user

cat > ~/.config/systemd/user/recall.service <<'UNIT' [Unit] Description=Recall memory server After=network-online.target tailscaled.service

[Service] ExecStart=%h/.local/bin/recall serve --tailscale Restart=always RestartSec=5

[Install] WantedBy=default.target UNIT systemctl --user enable --now recall sudo loginctl enable-linger "$USER" # start at boot without logging in

2. On every other device:

recall remote http://<server-name>:7878/mcp rcl_…   # MagicDNS name, e.g. http://pi:7878/mcp

recall connect

The agents on that device still run recall mcp; it now relays to the server. recall doctor checks the connection, and recall remote off switches back to a local store.

Why this is safe

  • Traffic between tailnet devices is end-to-end encrypted by WireGuard and limited to your own devices, so Recall can speak plain HTTP without a TLS stack.
  • On top of that, Recall requires a per-device bearer token. Tokens are stored only as hashes and can be revoked with recall token revoke laptop.
  • --tailscale binds only the tailnet interface, never your LAN or the internet. Don't use Tailscale Funnel for Recall.
  • recall audit shows which device wrote each memory.
  • To narrow access further, tag the server and allow only your own user in your tailnet policy:
  "grants": [{ "src": ["you@example.com"], "dst": ["tag:recall"], "ip": ["tcp:7878"] }]

Clients that only accept a URL can use the server directly, with { "url": "http:// :7878/mcp", "headers": { "Authorization": "Bearer rcl_…" } }. Web and mobile apps such as claude.ai and ChatGPT can't reach a private tailnet yet.

See your memory

recall serve also hosts a small web app, like Obsidian's graph view for what your agents know about you.

recall password       # on the machine running Recall: generates a strong password (shown once)

recall serve # then open http://localhost:7878 (or your tailnet address)

On a tailnet you don't need the password. When recall serve runs on a machine that's on Tailscale, it signs you in automatically. It asks the local Tailscale daemon who owns the device you're connecting from: the same verified identity tsidp is built on, with nothing extra to deploy.

  • Who gets in. Only the Tailscale user who owns the server, unless you allow others with recall tailnet allow friend@example.com. Tagged devices (servers, CI) are never signed in this way.
  • How it's detected. It works when Recall listens on the tailnet (recall serve --tailscale), and also behind tailscale serve, where Recall trusts the Tailscale-User-Login header only if tailscale serve is actually proxying to Recall's port.
  • **Sessions.*

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

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