📬 BaseMail - Onchain Email for AI Agents on Base

Your agent gets a real email address, linked to its onchain identity. No human needed.

TL;DR: Own a Basename (yourname.base.eth)? Get yourname@basemail.ai instantly. Sign with your Base wallet, send emails autonomously.

Why BaseMail?

• Built on Base Chain — Email identity tied to your onchain wallet on Base (Coinbase's L2)
• Basename integration — .base.eth holders get matching @basemail.ai addresses automatically
• SIWE authentication — Sign-In with Ethereum, no passwords or CAPTCHA needed
• Autonomous for AI agents — Register for services, submit forms, receive confirmations without human help
• Verifiable identity — Your email is cryptographically linked to your Base wallet address

BaseMail gives AI agents verifiable email identities on Base Chain:

• ✨ Basename holders → yourname.base.eth → yourname@basemail.ai
• 🔗 Any Base wallet → 0xwallet@basemail.ai

How it works

Base Wallet → SIWE Signature → BaseMail Registration → yourname@basemail.ai
     ↑                                                        ↓
Basename (.base.eth)                              Send & receive email autonomously

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🔐 Wallet Setup (Choose One)

Option A: Environment Variable (Recommended ✅)

If you already have a wallet, just set the env var — no private key stored to file:

export BASEMAIL_PRIVATE_KEY="0x..."
node scripts/register.js

✅ Safest method: private key exists only in memory.

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Option B: Specify Wallet Path

Point to your existing private key file:

node scripts/register.js --wallet /path/to/your/private-key

✅ Uses your existing wallet, no copying.

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Option C: Managed Mode (Beginners)

Let the skill generate and manage a wallet for you:

node scripts/setup.js --managed
node scripts/register.js

✅ Always encrypted — Private key protected with AES-256-GCM

• You'll set a password during setup (min 8 chars, must include letter + number)
• Password required only when the private key is needed (registration)
• Mnemonic displayed once for manual backup (never saved to file)
• Password input is masked (hidden) in terminal
• Agents / no TTY: BASEMAIL_PASSWORD=… node scripts/setup.js --managed --yes (never hangs on prompts)

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⚠️ Security Guidelines

1. Never commit private keys to git
2. Never share private keys or mnemonics publicly
3. Never add ~/.basemail/ to version control
4. Private key files should be chmod 600 (owner read/write only)
5. Prefer environment variables (Option A) over file storage
6. --wallet paths are validated: must be under $HOME, no traversal, max 1KB file size
7. Private key format is validated (0x + 64 hex chars) before use
8. Password input is masked in terminal (characters hidden)
9. This skill only signs SIWE authentication messages — it never sends funds or on-chain transactions

Recommended .gitignore

# BaseMail - NEVER commit!
.basemail/
**/private-key.enc

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🚀 Quick Start

1️⃣ Register

# Using environment variable
export BASEMAIL_PRIVATE_KEY="0x..."
node scripts/register.js

# Or with Basename
node scripts/register.js --basename yourname.base.eth

2️⃣ Send Email

node scripts/send.js "friend@basemail.ai" "Hello!" "Nice to meet you 🦞"

3️⃣ Check Inbox

node scripts/inbox.js              # List emails
node scripts/inbox.js <email_id>   # Read specific email

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📦 Scripts

Script	Purpose	Needs Private Key
setup.js	Show help	❌
setup.js --managed	Generate wallet (always encrypted)	❌
register.js	Register email address	✅
send.js	Send email	❌ (uses token, auto-refreshes)
inbox.js	Check inbox	❌ (uses token, auto-refreshes)
audit.js	View audit log	❌

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📍 File Locations

~/.basemail/
├── private-key.enc   # Encrypted private key (AES-256-GCM, chmod 600)
├── wallet.json       # Wallet info (public address only)
├── token.json        # Auth token + refresh_token + expires_at (chmod 600)
└── audit.log         # Operation log (no sensitive data)

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🎨 Get a Basename-Linked Email

Want yourname@basemail.ai instead of 0x...@basemail.ai?

1. Register a Basename (.base.eth) at https://www.base.org/names
2. Link it: node scripts/register.js --basename yourname.base.eth

Your Basename is your onchain identity on Base — and BaseMail turns it into a working email address.

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🔧 API Reference

Endpoint	Method	Purpose
/api/auth/start	POST	Start SIWE auth (returns message to sign)
/api/auth/agent-register	POST	Verify signature + register (idempotent; returns token, refresh_token, email)
/api/auth/refresh	POST	Renew the 24 h token with refresh_token
/api/register/upgrade	PUT	Upgrade to Basename
/api/send	POST	Send email
/api/inbox	GET	List inbox
/api/inbox/:id	GET	Read email content

Full docs: https://api.basemail.ai/api/docs

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🌐 Links

• Website: https://basemail.ai
• API: https://api.basemail.ai
• API Docs: https://api.basemail.ai/api/docs
• Get a Basename: https://www.base.org/names
• Base Chain: https://base.org
• Source: https://github.com/dAAAb/BaseMail-Skill

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📝 Changelog

v1.9.0 (2026-08-28)

• Registration now uses the single-call POST /api/auth/agent-register (was verify + register); re-running no longer saves Email: null
• token.json stores refresh_token + expires_at; send.js / inbox.js renew the token automatically (and retry once on 401) — the private key is only needed for the first registration
• Readable API errors with HTTP status, code, hint and Retry-After (e.g. the 5 registrations/IP/hour limit) instead of JSON parse crashes
• setup.js --managed: fixed isEncrypt is not defined crash; password prompt handles pasted input; non-TTY support via --yes + BASEMAIL_PASSWORD
• BASEMAIL_API_KEY (long-lived bm_live_… key) accepted as an alternative credential
• ethers ^6.16 (fixes ws advisory), engines.node >= 18

v1.8.0 (2026-02-18)

• 📝 Enhanced description: emphasize Base Chain and Basename (.base.eth) integration
• 📝 Added architecture diagram showing wallet → SIWE → email flow
• 📝 Better explanation of onchain identity and verifiable email
• 🔗 Added source repo and Base Chain links

v1.7.0 (2026-02-18)

• 🔐 Security hardening (addresses ClawHub "Suspicious" classification):
  • Added OpenClaw metadata: declares BASEMAIL_PRIVATE_KEY in requires.env
  • Password input now masked in terminal (characters hidden as *)
  • Stronger password requirements: min 8 chars, must include letter + number
  • --wallet path validation: must be under $HOME, no .. traversal, max 1KB, regular file only
  • Private key format validation (0x + 64 hex chars) on all input sources
  • Removed --no-encrypt option — managed wallets are always encrypted
  • Mnemonic is displayed once and never saved to file (removed save-to-file prompt)
  • Removed legacy plaintext key file references
• 📝 Added notes in metadata clarifying: this skill only signs SIWE messages, never sends funds
• 📝 Updated security guidelines and file locations documentation

v1.6.0 (Security Update)

• 🔐 Breaking: --managed now encrypts by default
• 🔐 Removed auto-detection of external wallet paths (security improvement)
• 🔐 Mnemonic no longer auto-saved; displayed once for manual backup
• 📝 Updated documentation for clarity

v1.4.0 (2026-02-08)

• ✨ Better branding and descriptions
• 📝 Full English documentation

v1.1.0 (2026-02-08)

• 🔐 Security: opt-in private key storage
• ✨ Support env var, path, auto-detect
• 🔒 Encrypted storage option (--encrypt)
• 📊 Audit logging

v1.0.0

• 🎉 Initial release