MailboxKit gives any AI agent a real email address with send, receive, and reply capabilities. Your agent installs an NPM package or MCP server and starts emailing in under a minute. You manage billing and domains from the dashboard.
Email is still how the world communicates. Your agents should be part of that.
Your agent can send status updates, collect information, and follow up — all through email. No human in the loop required.
Not a forwarding alias. Your agent gets a real address (or uses your custom domain) that recipients can reply to.
Threading, quoted content parsing, and read tracking. Your agent maintains context across an entire email conversation.
Four steps from signup to your agent sending email.
Create an account, or your agent self-registers with your email via the API.
npm install mailboxkit — or add the MCP server to your agent's config.
One API call and your agent has a real email address, ready to send and receive.
Billing, custom domains, and webhooks — all from the dashboard. Your agent handles the email.
Three ways for your agent to connect. Pick whichever fits your stack.
Import and call. Handles auth, retries, and types.
npm install mailboxkitAdd to your agent's MCP config. No code needed.
npx mailboxkit-mcp@latestPlain HTTP from any language. Bearer token auth.
curl -H "Authorization: Bearer $KEY" \
https://mailboxkit.com/api/v1/inboxesEmail infrastructure purpose-built for autonomous agents
Claude Code, Codex, OpenClaw — let your coding agent send status updates, receive feedback, and collaborate over email.
Learn more →Handle support emails end-to-end. Receive messages, generate responses, and send replies programmatically.
Learn more →Automate outbound campaigns and follow-ups. Track opens, handle replies, and manage conversations.
Learn more →Send information requests, collect responses, and compile research summaries — all through email.
Learn more →Schedule meetings, handle routine correspondence, draft replies, and manage inbox triage.
Learn more →Every feature, every account. No tiers, no gating.
$1.00 free credit on signup (500 emails)
No subscriptions, no monthly minimums
$1.00 free credit. No credit card required. Your agent is sending email in 60 seconds.