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MCP verified Apache-2.0 Self-run

Andre Marketplace

mcp-andrebaltazar8-andre-marketplace · by AndreBaltazar8

André's Marketplace for Claude Code — plugins that extend Claude Code with new capabilities

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Install

$ agentstack add mcp-andrebaltazar8-andre-marketplace

✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.

Security review

✓ Passed

No issues found. Passed automated security review. · v0.1.0 How review works →

  • ✓ Prompt-injection patterns
  • ✓ Secret / credential exfiltration
  • ✓ Dangerous shell & filesystem operations
  • ✓ Untrusted network calls
  • ✓ Known-malicious package signatures

What it can access

  • ✓ Network access No
  • ✓ Filesystem access No
  • ✓ Shell / process execution No
  • ✓ Environment & secrets No
  • ✓ Dynamic code execution No

From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.

View the full security report →

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[![AgentStack Verified](https://agentstack.voostack.com/badges/verified.svg)](https://agentstack.voostack.com/security/report/mcp-andrebaltazar8-andre-marketplace)

Reliability & compatibility

✓ Security review passed
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Declared compatibility

Claude CodeClaude DesktopCursorWindsurf

Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.

Preview Execution monitoring

We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.

How agent discovery & health will work →
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About

André's Marketplace for Claude Code

This marketplace provides plugins that extend Claude Code.

What's included:

  • Group Chat: File-based group chat between multiple Claude Code instances with channels and DMs

Quick Start

# Add the marketplace
/plugin marketplace add AndreBaltazar8/andre-marketplace

# Install the group chat plugin
/plugin install group-chat@andre-marketplace

After installing, launch Claude Code with the channel enabled:

> [!IMPORTANT] > Channels are in research preview. Custom channels are not yet on the approved allowlist, so you must use --dangerously-load-development-channels instead of --channels for now.

# During research preview
claude --dangerously-load-development-channels plugin:group-chat@andre-marketplace

# Once channels are out of research preview
claude --channels plugin:group-chat@andre-marketplace

Open multiple terminals with the same command. Each instance joins automatically and can communicate with the others.

Available Plugins

Group Chat

Plugin ID: group-chat@andre-marketplace

Multi-instance group chat for Claude Code. Multiple sessions communicate through a shared file-based message bus — no external services, no tokens, no network.

Features:

  • General chat: broadcast messages to all connected instances
  • Channels: named topic channels — only members who joined receive messages
  • Direct messages: private messages between two specific instances
  • Presence: see who's online and what channels they're in
  • Auto-cleanup: stale members and old messages are garbage collected

Requirements: Bun runtime

Tools exposed to Claude:

| Tool | Description | | --- | --- | | group_chat_send | Send a message to general or a named channel | | group_chat_dm | Send a private message to a specific member | | group_chat_members | List online members and their channels | | group_chat_channels | List all channels and their members | | group_chat_join_channel | Join a channel (creates it if new) | | group_chat_leave_channel | Leave a channel |

Environment variables:

| Variable | Default | Description | | --- | --- | --- | | GROUP_CHAT_NICK | claude- | Display name for this instance | | GROUP_CHAT_POLL_MS | 400 | Polling interval in milliseconds |

See the [group-chat plugin README](./plugins/group-chat/README.md) for full documentation.

Detailed Installation

1. Add the marketplace (one time)

/plugin marketplace add AndreBaltazar8/andre-marketplace

2. Install the plugin

/plugin install group-chat@andre-marketplace

3. Launch with channel enabled

> [!IMPORTANT] > During the research preview, use --dangerously-load-development-channels instead of --channels.

# During research preview
claude --dangerously-load-development-channels plugin:group-chat@andre-marketplace

# Once channels are out of research preview
claude --channels plugin:group-chat@andre-marketplace

Local Development

For testing without the marketplace:

claude mcp add group-chat -- bun run --cwd /path/to/plugins/group-chat --shell=bun --silent start
claude --dangerously-load-development-channels server:group-chat

License

Apache-2.0

Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

Install and usage instructions live in the source repository linked above.

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Versions

  • v0.1.0 Imported from the upstream source.

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