Buddy MCP

Name: Buddy MCP
Author: Lyellr88

by Lyellr88version 1.4.4i★ –iRuns on your computer

Registry nameio.github.Lyellr88/buddy-mcp

Install

Overview

Description from the maker (original English)

Claude Code creature collection game. Hatch buddies, pet to boost roll luck, complete the BuddyDex.

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: Games, sports, food & learning

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": {
    "buddy": {
      "command": "npx",
      "args": [
        "-y",
        "@lyellr88/buddy-mcp"
      ]
    }
  }
}

Run this in your terminal

claude mcp add buddy -- npx -y @lyellr88/buddy-mcp

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "buddy": {
      "command": "npx",
      "args": [
        "-y",
        "@lyellr88/buddy-mcp"
      ]
    }
  }
}

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": {
    "buddy": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@lyellr88/buddy-mcp"
      ]
    }
  }
}

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 Lyellr88, 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 Games, sports, food & learningi

More stars than 0% of the other 1286 servers in this category
Published to the registry more recently than 6% of the other 1286 servers in this category
Basic checks equal to or better than 100% of the other 1286 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 Buddy MCP 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 (1.4.4) reached the registry 7 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: Prospre, RSS.com MCP by usefulapi, Castos MCP by usefulapi

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

Prospre

by prospre

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Runs in the cloudUpdated today

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RSS.com MCP by usefulapi

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Castos MCP by usefulapi

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Runs in the cloudUpdated today

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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.

Status: Archived / Historical

The official Claude Code /buddy feature was a limited-time April Fools Easter egg (April 1-7, 2026). I built buddy-mcp during that window thinking it might stick around longer. After it was removed, the deep native integration this tool was designed for no longer exists.

The repo is kept as an archive. The code, gacha system, TUI builder, and MCP tools still work as a standalone terminal companion — but the magic was always the native UI integration, and that's gone.

If Anthropic ever brings back native companion support or opens up a proper extension API, I'll pick this back up where I left off.

Thanks to everyone who checked it out while it was relevant.

Need a break from long code sessions? Stuck on a bug? Reroll a buddy, talk with them, or interact by petting them to build affection and improve your odds at higher-tier buddies on the next roll. If enough people want it, I'll build out Battle-Buddies where you can pit your buddy against others and unlock exclusive species that sync back into your local pool.

A collect them all companion system for Claude Code. Roll for a rare buddy, patch it directly into the binary,. buddy-mcp is an MCP server that replaces Claude Code's built-in companion with one you actually rolled for. Reroll, get lucky, close Claude, reopen. Your new buddy is waiting. Legendary buddy could be yours on your next Claude session

Quick Demo

Interactive Builder

Build your perfect buddy with full control.

Reroll in Action

Roll, close Claude, reopen and enjoy your new buddy.

Interact with Tools

Talk, pet, and explore your buddy's dex.

How It Works

Claude Code's companion is generated from a salt string baked into the binary. buddy-mcp:

Rolls random desired traits (species, rarity, eye, hat)
Brute-forces a salt that hashes to those traits (multi-worker, runs fast)
Patches the binary in place, or queues the patch for when you close Claude
Saves your full buddy profile with stats, name, and personality
Tracks every species you've ever rolled in your BuddyDex

No companion server. No cloud. Just you, your binary, and the gacha gods.

Token footprint is kept intentionally small of 29 registered tools, Claude only ever sees ~9 at a time. The other 20 stay hidden until you reroll. See TECHNICAL.md for the full breakdown.

🛠️ Looking for the technical deep-dive? See TECHNICAL.md for the patch flow diagrams, binary patching logic, and state file reference.

TUI Builder (`buddy-mcp-build`)

Want more control? Use the interactive builder:

node dist/tui/cli.js

Command	What it does
`build your own`	Pick species, rarity, eye, hat and it brute-forces a matching salt and patches
`browse presets`	Pick from curated preset buddies
`saved buddies`	Switch between previously saved buddy profiles
`current`	Display current buddy info
`preview`	Preview ASCII art for any species
`share`	Copy your buddy's ASCII card to clipboard
`restore`	Restore binary from the best available backup
`rehatch`	Delete current buddy and start fresh

Bun optional but recommended. Install bun.sh for the full animated TUI. Falls back to sequential prompts without it.

Quick Start

Try me: run reroll_buddy → close Claude Code → reopen → your new buddy is live.

1. Prerequisites

Claude Code CLI installed
Node.js v20+ - required for everything
Bun - required for salt brute-forcing (rerolling) + full animated TUI

2. Install via npm

npm install -g buddy-mcp

This installs both commands globally:

buddy-mcp - the MCP server (Claude Code runs this)
buddy-mcp-build - the interactive TUI builder (you run this)

3. Register with Claude

claude mcp add buddy-mcp buddy-mcp

Claude will auto-detect the installed binary and connect it.

4. Verify

Open Claude Code. Your buddy is live—use Claude Code's native /buddy command to see your card, or ask Claude: "show me my buddy"

You should see your companion's species, rarity, stats, and personality. You're in.

4b. Natural Language Activation

All buddy tools work through natural language. Claude's NLP detects intent automatically:

Natural Language	Activates
"reroll buddy" / "let's roll again"	`reroll_buddy`
"talk to my buddy" / "what does buddy think"	`buddy_talk`
"pet buddy" / "pet them"	`pet_buddy`
"my buddy dex" / "show me my collection"	`view_buddy_dex`
"export buddy card" / "save my buddy"	`export_buddy_card`
"export sprite" / "save the sprite"	`export_buddy_sprite`

No tool names required — just chat naturally.

5. Launch the TUI Builder (optional)

For the full interactive builder with live preview:

buddy-mcp-build

Auto-detects Bun for animated TUI. Falls back to basic prompts without it.

The Gacha System

Every reroll is a random pull from the pool. Rarity affects stat floors. Legendaries hit different.

Rarity	Drop Rate	Stat Floor
Common	60%	5
Uncommon	25%	15
Rare	10%	25
Epic	4%	35
Legendary	1%	50

18 species: duck · goose · blob · cat · dragon · octopus · owl · penguin · turtle · snail · ghost · axolotl · capybara · cactus · robot · rabbit · mushroom · chonk

Each buddy has 5 stats: Debugging, Patience, Chaos, Wisdom, Snark. A peak stat is boosted high and a dump stat is kept humble. Personality shapes how buddy_talk and pet_buddy respond. A high-Chaos dragon hits different than a patient turtle.

Tool	What it does
`reroll_buddy`	🎲 Spin the wheel. Brute-forces a salt matching a random rare+ outcome and patches your binary. Close Claude and reopen to see it.
`pet_buddy`	🤚 Poke your buddy. Each pet adds 1-15% toward earning an affection token. At 100%, earn 1 token that stacks and persists across sessions. Spend a token on next `reroll_buddy` to guarantee rare+ rarity + 60% hat chance + 20% shiny chance.
`buddy_talk`	💬 Ask your buddy to say something. Uses stat-based response templates weighted by top 2 stats. Optional context parameter for focused stat selection. Output shown verbatim.
`view_buddy_dex`	📖 Browse every species you've ever rolled. Gotta catch 'em all.
`export_buddy_card`	🖼️ Export your full buddy card as an SVG image file.
`export_buddy_sprite`	🎨 Export just the buddy ASCII sprite as an SVG image file.
`deactivate_buddy_interact`	🔕 Turn off buddy observation mode. Your buddy stops watching. (Buddy observation is always on by default.)

Stat Personality Tools

20 baked-in tools. Only 2 are visible at a time: 1 randomly picked from each of your buddy's top 2 stats by raw value. The other 18 stay hidden. The visible pair is locked per roll. It doesn't change until you reroll. Every buddy shows a different pair.

Troubleshooting

Buddy doesn't change after reroll

Normal flow (Windows): When you reroll and Claude is running:

Reroll triggers a background watcher — no action needed from you
Close Claude Code whenever — watcher detects it and applies the patch automatically
Reopen Claude Code — your new buddy is live

If it doesn't appear after reopening:

Verify Claude is fully closed (check Task Manager on Windows)

Even minimized or backgrounded windows count — they keep the binary locked
Wait a few seconds after closing

Reopen Claude Code

The startup hook auto-applies any pending patches
You should see your new companion immediately

Prefer immediate patching?

If you want to guarantee a patch applies without waiting for the watcher, close Claude *before* rerolling:

# Option 1: Use the interactive TUI builder (simplest)

buddy-mcp-build

Option 2: Close Claude, then use the reroll_buddy tool

(patch applies immediately without needing the watcher)

This is the only time you need manual steps — the watcher handles all other cases.

Credits

Forked and extended from any-buddy by cpaczek.

Buddy MCP

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 Games, sports, food & learningi

Common questions

Alternatives

Prospre

RSS.com MCP by usefulapi

Castos MCP by usefulapi

README from the maker

Quick Demo

How It Works

TUI Builder (buddy-mcp-build)

Quick Start

1. Prerequisites

2. Install via npm

3. Register with Claude

4. Verify

4b. Natural Language Activation

5. Launch the TUI Builder (optional)

The Gacha System

Stat Personality Tools

Troubleshooting

Buddy doesn't change after reroll

Prefer immediate patching?

Option 2: Close Claude, then use the reroll_buddy tool

(patch applies immediately without needing the watcher)

Credits

TUI Builder (`buddy-mcp-build`)