# Mailly

> Two-way email for AI agents and applications through MCP, API, CLI, and SMTP. Read conversations, review reply drafts, connect campaigns and workflows, and track every delivery.

Mailly is operated by SuperAgents, LLC. Hosted agents only draft replies; sending requires human approval.

## Pages

- [Product](https://mailly.site/product): Two-way inboxes, conversations, agent draft approval, contacts, templates, campaigns, workflows, and delivery tracking. See what Mailly does and where the controls are.
- [Integrations](https://mailly.site/integrations): Bring email into your agents and applications through remote MCP, the HTTP API, the CLI, the Claude Code skill, SMTP, and webhooks.
- [Docs](https://mailly.site/docs): guides, CLI, Remote MCP and the HTTP API reference. An index for agents is at https://mailly.site/docs/llms.txt, and every docs page has a Markdown version (append .md).
- [Pricing](https://mailly.site/pricing): No subscription required. Free includes 3,000 emails and a $1 monthly allowance; then top up from US$5 and pay $0.001 per extra email and official token rates for AI. Developer is optional at $20/month or $200/year.
- [Changelog](https://mailly.site/changelog): Everything we have shipped since Mailly launched on October 11, 2026: the Agent panel, draft review links, verification-code waiting, Remote MCP tools, webhooks and docs.

## Developer resources

- [Agent setup (auth.md)](https://mailly.site/auth.md): how an agent sets up a Mailly inbox and gets an API key over public HTTP. Reserve the human's chosen name with POST https://api.mailly.site/onboarding/start (no auth), give the human only verification_url, then poll status_url with the private setup_token. After the human confirms in their browser, the ready response returns the inbox address and the account api_key. Store the key securely; get the human's approval before sending mail. Humans can also start at https://mailly.site/onboard.
- [HTTP API reference](https://mailly.site/docs/api)
- [OpenAPI specification](https://api.mailly.site/openapi.json)
- Remote MCP endpoint https://mcp.mailly.site/mcp (OAuth sign-in)
- CLI: `npm install -g mailly-cli`, then `mailly login` ([source and agent skill](https://github.com/superagents-lab/mailly-cli))

## Plans

- Free: US$0/month. Inboxes: 3; Emails per month: 3,000; Custom domains: Platform domain only; "Sent via Mailly" line in sent emails: Shown; Monthly usage allowance: US$1; Send recipients / 24h: 100; API / CLI / Remote MCP / Webhook: Included; Agent chat, memory, draft approval: Included.
- Developer: US$20/month. Inboxes: 10; Emails per month: 30,000; Custom domains: 10; "Sent via Mailly" line in sent emails: Removed; Monthly usage allowance: US$10; Send recipients / 24h: No plan daily cap; API / CLI / Remote MCP / Webhook: Included; Agent chat, memory, draft approval: Included.
- Developer: US$200/year. Inboxes: 10; Emails per month: 30,000; Custom domains: 10; "Sent via Mailly" line in sent emails: Removed; Monthly usage allowance: US$10; Send recipients / 24h: No plan daily cap; API / CLI / Remote MCP / Webhook: Included; Agent chat, memory, draft approval: Included.
- No subscription required: stay on Free and top up a prepaid USD balance from US$5 to US$1,000 (one-time payment, no automatic renewal; the balance carries over). Email beyond the included count costs US$0.001 each; hosted-agent AI is billed at the model's official token rates without markup. The monthly allowance pays first.
- Enterprise: custom inbox, domain and email limits with a negotiated price and invoiced billing. Contact sales@mailly.site.
- Details and overage rates: https://mailly.site/pricing

## Other languages

- [简体中文](https://mailly.site/zh)

## Legal

- [Privacy Policy](https://mailly.site/privacy): How SuperAgents, LLC collects, uses, shares, and protects data when you use Mailly, including email content, hosted agents, and billing.
- [Terms of Service](https://mailly.site/terms): The agreement for using Mailly: accounts, acceptable use, agents and AI output, fees, refunds, termination, and liability. Operated by SuperAgents, LLC.