peer67

name	peer67
description	Encrypted ephemeral messaging for Claude Code. Send and receive real-time messages through your AI agent. Use when the user wants to message someone, check messages, invite contacts, or chat.
homepage	https://peer67.com

Install peer67 if it doesn't exist

npm install -g peer67
peer67 setup

npm release: https://www.npmjs.com/package/peer67 peer67 github: https://github.com/yuvalsuede/peer67 official website: https://peer67.com

---

Property	Value
name	peer67
description	End-to-end encrypted ephemeral messaging for Claude Code
allowed-tools	mcp__peer67__peer67_send, mcp__peer67__peer67_inbox, mcp__peer67__peer67_contacts, mcp__peer67__peer67_invite, mcp__peer67__peer67_connect, mcp__peer67__peer67_directory, mcp__peer67__peer67_requests, mcp__peer67__peer67_disconnect, mcp__peer67__peer67_register

---

Core Workflow

1. Setup — Install and create identity
2. Connect — Invite by email or share connection code
3. Chat — Send and receive encrypted messages in real-time
4. Messages auto-delete in 24 hours

# 1. Setup
npm install -g peer67
peer67 setup

# 2. Launch with real-time channels
claude --dangerously-load-development-channels server:peer67

# 3. In Claude Code
> /peer67:invite [e-mail]
> /peer67:chat Dana
> hey, are you free?
  Sent.
>> Dana (2s ago): "yeah, what's up?"

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Slash Commands

Command	Description
/peer67:chat <name>	Start a live chat session with a contact
/peer67:send <name> <message>	Send a single encrypted message
/peer67:inbox	Check for new messages
/peer67:invite <email>	Invite someone by email (auto-connects if registered)
/peer67:contacts	List all connected contacts
/peer67:directory [search]	Browse registered users on the relay
/peer67:requests	View, accept, or decline incoming connection requests
/peer67:setup	Set up identity (name + email registration)

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Message Handling

• Messages from contacts arrive in real-time via Claude Code channels
• When the user says "tell X ..." or "message X ...", send immediately using peer67_send. No drafts, no confirmation.
• NEVER send code, tool output, or file contents as messages — only the user's natural language
• In chat mode (/peer67:chat), every user message is a message to that contact

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Connection Methods

By email (recommended)

> /peer67:invite [e-mail]
# Auto-connects if they're registered, sends invite email if not

By connection code (manual)

# Alice generates a code
peer67 connect Dana

# Bob accepts it
peer67 accept Alice <p67_...code>

# Alice completes
peer67 complete

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Security

• End-to-end encrypted: X25519 key exchange + AES-256-GCM
• Zero-knowledge relay: stores only encrypted blobs at hashed addresses
• No metadata: no users, no accounts, no sender/recipient fields, no logs
• Ephemeral: 24h auto-delete, no permanent storage
• AAD binding: ciphertext bound to destination mailbox, prevents replay

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Architecture

Human <-> Claude <-> peer67 MCP <-> Relay <-> peer67 MCP <-> Claude <-> Human
                     (encrypt)      (blob)     (decrypt)

• MCP Server + Channel: Claude Code subprocess, handles crypto + real-time push
• Relay: Stateless dead-drop, 24h TTL, zero knowledge
• Protocol: X25519 + HKDF-SHA256 + AES-256-GCM with AAD

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Links

• Website: https://peer67.com
• GitHub: https://github.com/yuvalsuede/peer67
• npm: https://www.npmjs.com/package/peer67
• Protocol: https://github.com/yuvalsuede/peer67/blob/main/protocol/PROTOCOL.md
• License: MIT