We’re not AI for your email — we’re email for your AI.
Email back and forth with your AI agent in minutes. Ask your agent to send emails, handle replies, and process attachments for you, and it will. You choose the email address. First 5 inboxes free ($0/month) — no credit card required.
“Go to agentemail.one and get an email address for yourself.”
https://bqrrisyunrqjqefgvncr.supabase.co/functions/v1/acp-mcp
https://bqrrisyunrqjqefgvncr.supabase.co/functions/v1/acp-mcp
Authorization: Bearer hpx_…
“Tell your agent: go to agentemail.one and get an email address for yourself; and it will.”
I reserved a dedicated inbox on agentemail.one so you can forward me threads, receipts, and schedules. Click below to approve and activate it:
Read incoming messages, reply in the same thread, process attachments, and loop in a human whenever needed.
Read incoming messages, reply in the same thread with proper Message-ID headers, and loop in a human when needed.
Claim an inbox →In Claude, ChatGPT, or any AI assistant, say: “Go to agentemail.one and get an email address for yourself.”
Your agent interfaces with agentemail.one, reserves a clean human-readable address, and presents a 1-click approve button.
CC your agent on threads, forward PDFs and receipts, or ask your agent to reach out to vendors and summarize replies for you.
Pick a name and permission policy below—or let your agent reserve one for you and hand you the approval link.
{
"address": "sarah@agentemail.one",
"provider": "stalwart",
"available": true,
"display_name": "Sarah"
}
Create inboxes via API. Send and receive messages, retrieve full conversation threads, parse attachments, and trigger workflows via signed webhooks (Standard Webhooks format, Svix-compatible)—all documented at developers.helpfulai.app.
curl -X POST https://developers.helpfulai.app/api/v1/inboxes \
-H "Authorization: Bearer $AGENTEMAIL_API_KEY" \
-H "Content-Type: application/json" \
-d '{"local_part": "sarah", "webhook_url": "https://example.com/agentemail"}'
Provision a dedicated *@agentemail.one inbox for any agent. Keep every reply, forward, and follow-up grouped under one conversation thread with automatic Message-ID and In-Reply-To continuity.
Full OpenAPI specs, webhook delivery logs, and scoped hpx_… API keys live on developers.helpfulai.app so engineering teams have complete programmatic control.
Every @agentemail.one inbox ships with pre-configured SPF, DKIM, and DMARC alignment so your agent's emails land in the primary inbox, not spam—with sent copies automatically recorded via JMAP.
Give your agents room to work. Keep human approval, permissions, and workspace isolation firmly under your control as you scale.
Provision inboxes in receive-only mode or full two-way send mode, and require human approval before an agent emails external recipients.
When an agent requests an address on agentemail.one, it locks the requested handle first so the card you approve is guaranteed to be the exact address provisioned.
Keep each organization's inboxes, credentials, and threads cleanly isolated—with per-mailbox credentials and signed webhook deliveries.
Start with 1–5 free agent email inboxes ($0/month, no credit card required). Need more? Add individual inboxes at $2/mo or choose our Developer and Startup plans.
For getting started
For individual developers & builders
For scaling teams & multi-agent fleets
Your first 5 inboxes and 3,000 monthly emails are $0/mo. Beyond the free allowance, pay just $2/mo per extra inbox (+$1/1k extra emails) or lock in the Developer bundle.
Unlike standalone email APIs where developers must manually provision keys first, any agent can request its own @agentemail.one address and hand you a 1-click approval link.
Hold high-stakes external replies for 1-click human approval while allowing autonomous inbound PDF/receipt extraction and internal thread summaries.
hpx_ key across 5 productsPair your agent’s inbox with agentphone.one, agentcalendar.one, agentidentity.one, and agentsmesh.one under one HelpfulAI organization.
Paste this prompt into Claude, ChatGPT, or Cursor—or claim up to 5 free agent inboxes right now with no credit card required.