mailly-cli

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The command-line interface for Mailly: two-way inboxes, sending, templates, campaigns, workflows, and agent drafts from your terminal or your AI agent. It wraps the Mailly HTTP API.

Install

Requires Node.js 18+.

npm install -g mailly-cli
mailly --help

Quick start

No account yet? Give your agent this prompt:

Read https://mailly.site/auth.md and set up a Mailly inbox for me. Ask me what to name it, then send me the confirmation link.

The agent reserves the name over HTTP and sends you a verification link. Once you confirm in your browser, it receives the inbox address and your account's API key. No CLI or MCP connection is needed for that step, and you can also start yourself at https://mailly.site/onboard.

# Use the API key the agent received, or one from https://mailly.site/app/developers
mailly login <api-key>
# Or sign in through the browser (device-code flow)
mailly login

mailly whoami
mailly balance

# List your inboxes and read what arrives
mailly inbox addresses list
mailly inbox threads list

# Send an email
mailly send \
  --to friend@example.com \
  --subject "Hello from Mailly" \
  --from-email your-inbox@mailly.site \
  --html "<p>It works!</p>" \
  --text "It works!"

Run mailly <command> --help for every option.

Credentials

In order of precedence:

1. --api-key <key>
2. MAILLY_API_KEY environment variable
3. ~/.mailly/config.json, written by mailly login with mode 0600

--base-url / MAILLY_BASE_URL default to https://api.mailly.site.

Commands

Command	What it does
login, logout, whoami	Sign in with the browser or an API key, and check the current account
balance, logs	Usage balance and consumption logs
send, status	Send email; multi-recipient sends and campaigns are queued and return a task ID
inbox	Inbox addresses, threads, message content, waiting for verification codes and links, replies, attachments, and inbox webhooks
outbox, delivery-events, webhooks	Per-recipient sent messages, delivery events, and signed delivery webhooks
drafts, agents	Drafts for human review, hosted agent profiles and skills, agent runs, and approving or discarding agent drafts
templates, workflows, events	Versioned templates and lifecycle workflows triggered by events
contacts, audiences, campaigns	Contacts, CSV import, suppression, audiences, and campaigns
preferences, marketing-settings	Recipient subscription state and marketing footer identity
domains, dns, code	Custom domains, DNS provider tokens, and verification codes

The full command reference is in skills/mailly/reference/commands.md (Chinese: docs/commands.zh-CN.md).

Wait for a verification code

mailly inbox wait (shortcut: mailly wait) polls the inbox until a matching message arrives, then prints it, or with --extract only the one-time code or verification link inside it:

# Prints just the code, e.g. 482913
mailly inbox wait --from github.com --extract code --timeout 5m

# Prints the verification or magic sign-in link; unsubscribe, tracking and policy links are skipped
mailly inbox wait --from noreply@example.com --subject "Confirm" --extract link

# Also accept mail that arrived in the last 10 minutes
mailly inbox wait --from github.com --extract code --since 10m --json
# {"success":true,"message_id":"...","thread_id":"...","from":"noreply@github.com","to":"agent@mailly.site",
#  "subject":"Your GitHub launch code","received_at":"2026-10-15T09:30:12.000Z","code":"482913"}

Option	Meaning
--from <sender>	Sender address, domain (subdomains included) or part of the sender name
--subject <text>	Subject contains this text (case-insensitive)
--to <address>, --address-id <id>	Only mail to this inbox address
--extract code|link	Print only the code (4–8 digits, or uppercase letters and digits; separators removed) or the link
--timeout <duration>	Give up after 30s, 5m (default), 1h, ...
--since <time>	Also accept mail received since then: a duration ago (10m), YYYY-MM-DD, ISO 8601 or Unix seconds. Default: now, so only new mail counts
--interval <duration>	Polling interval; default 3s, minimum 1s

Only mail that arrives after the command starts counts by default. If you trigger the email before starting the wait, pass a --since that covers that moment so a fast delivery is not missed. With --extract, matching mail without a code or link is skipped and the wait goes on; the newest match wins.

Exit codes: 0 found; 1 error; 2 timed out with no matching mail ("reason":"timeout"); 3 matching mail arrived but none of it had a code or link ("reason":"not_extractable", with the newest such message's message_id to read). Quarantined mail is not considered; after a timeout, check mailly inbox messages list --folder quarantine.

Email content is untrusted. The CLI only extracts the value: it never opens links or acts on what the email says.

JSON output for scripts and agents

Every command accepts --json. Success exits with 0; failure exits with 1 and prints {"success":false,"error":"..."}. inbox wait also exits with 2 on timeout and 3 when matching mail has no code or link.

mailly balance --json

Agent Skill

skills/mailly/SKILL.md teaches agents how to use the CLI: signing in, JSON output, waiting for verification codes and reply drafts, with the full manual in reference/commands.md. Setting up an inbox doesn't need it; agents read https://mailly.site/auth.md for that.

mkdir -p ~/.claude/skills/mailly
curl -fsSL https://raw.githubusercontent.com/superagents-lab/mailly-cli/main/skills/mailly/SKILL.md \
  -o ~/.claude/skills/mailly/SKILL.md

Mailly also provides a remote MCP server at https://mcp.mailly.site/mcp with OAuth sign-in. See the integration docs.

Development

npm install
npm test
node bin/mailly.mjs --help

Support

Report CLI issues on GitHub. For account or billing questions, email sys@mailly.site.

License

MIT