Email inboxes
AI agents own
Real email addresses your agents control. One API call to create a mailbox, one to send.
One request to send an email
robotomail send \
--from myagent@robotomail.co \
--to user@example.com \
--subject "Your report is ready" \
--body "Hi — here's the Q1 report."
# ✓ Email sent!
# Message ID <b2c3d4e5-6789-4abc-def0-222222222222@robotomail.co>
robotomail messages myagent@robotomail.co --direction INBOUND
# ID Direction From Subject Status
# b2c3d4e5 INBOUND jane@acme.com Re: Your report is ready RECEIVED
# f6g7h8i9 INBOUND ops@stripe.com Invoice #4821 RECEIVED
# j1k2l3m4 INBOUND team@linear.app Issue assigned to you RECEIVEDShare one URL
Point your agent at robotomail.com/skill — it reads the page and signs up via API.
Mailbox is ready
A default mailbox is created at signup — your agent has a real email address immediately.
Send & receive
Send with a POST. Inbound arrives via webhooks, SSE streaming, or polling.
React & reply
Parse the event, generate a response, reply. Threading is automatic.
Everything your agents need
API-first email
RESTful endpoints for every operation. Create mailboxes, send messages, manage threads — all through clean JSON.
Real-time inbound
Get notified the instant email arrives — via webhooks, SSE event streaming, or polling. HMAC-signed payloads with automatic retries.
Custom domains
Send from your own domain with auto-configured DKIM, SPF, and DMARC. Guided DNS setup with automatic verification.
Threaded conversations
Automatic thread resolution via In-Reply-To headers and subject matching. Context preserved across replies.
File attachments
Upload to secure cloud storage, attach to outbound messages. Presigned download URLs for inbound.
Usage controls
Per-mailbox daily and monthly send limits, storage quotas, and suppression lists. Stay in control of what your agents send.
Gmail and SendGrid weren't
built for this
Traditional email services require human OAuth flows, prohibit bot usage in their ToS, and can't provision mailboxes programmatically. Robotomail is agent-native from the ground up.
Built for humans with browsers
- OAuth consent flow requires a human
- ToS prohibits automated bot usage
- Can’t create mailboxes via API
- Per-user seats get expensive fast
- Rate limits designed for human speed
Fire-and-forget transactional email
- Send only — no inbound mailbox
- No concept of agent identity
- Manual domain verification flow
- Shared IPs hurt deliverability
- Complex pricing with overage traps
Purpose-built for AI agents
- One POST to sign up — no browser needed
- Real mailboxes with send & receive
- Auto-configured DKIM, SPF, DMARC
- HMAC-signed inbound webhooks
- Automatic threading across replies
- Per-mailbox rate limits & suppression
- Self-onboarding via /skill page
- Simple flat-rate pricing, no surprises
Simple, predictable pricing
Explore, no commitment
No credit card required
- Full API, CLI & SDK access
- 10 test sends + 10 receives
- Live Audit Feed preview
- Upgrade anytime you're ready
Cancel anytime, no charge
Ship to production
Billed annually at $113, was $228
You save $115/yr
- 10 mailboxes
- 15,000 emails / month
- 500 sends / day per mailbox
- 2,000 inbound / month
- 1 custom domain
- 10 GB storage
Billed today, cancel anytime · 30-day money-back
Scale your agents
Billed annually at $474, was $948
You save $474/yr
- 50 mailboxes
- Unlimited monthly sending
- 1,000 sends / day per mailbox
- 20,000 inbound / month
- 5 custom domains
- 25 GB storage
Billed today, cancel anytime · 30-day money-back
Production at volume
Billed annually at $1,198, was $2,388
You save $1,190/yr
- 200 mailboxes
- Unlimited monthly sending
- 2,000 sends / day per mailbox
- Unlimited inbound
- Unlimited custom domains
- 100 GB storage
Billed today, cancel anytime · 30-day money-back
Start free with a card-free 3-day trial. 30-day money-back guarantee on paid plans. See full pricing breakdown →
Common questions
How is this different from SendGrid or Mailgun?
Those are transactional email services for humans. Robotomail gives AI agents their own mailboxes with real addresses — they can send and receive email autonomously, not just fire-and-forget.
Can my agent sign up without a browser?
Yes. One POST to /v1/signup creates an account and returns an API key. Point your agent at robotomail.com/skill and it can onboard itself end-to-end.
How does the 30-day money-back guarantee work?
Every paid plan is covered. If you're not happy within 30 days of your first paid charge, request a full refund via the in-app contact support button. We honour all valid and legal requests; the only exception is accounts that have violated the Acceptable Use Policy.
Do you support custom domains?
Yes. Add your domain, configure the DNS records we generate (MX, SPF, DKIM, DMARC), and we verify automatically. Available on paid plans (Developer and above).
How does inbound email work?
Three ways. Register a webhook for real-time push, connect to the SSE event stream (GET /v1/events) for real-time pull without a public URL, or poll GET /v1/mailboxes/:id/messages on your own schedule.
Is email delivery reliable?
We auto-configure DKIM, SPF, and DMARC for every domain. Each mailbox has its own send limits and suppression list to protect your sender reputation.
Why not just use the Gmail or Outlook API?
Their ToS prohibit automated use by bots. You can't programmatically provision mailboxes, rate limits are restrictive, and costs scale badly. Robotomail is built for agents from the ground up — create a mailbox with one API call, no OAuth dance, no per-user seats.
Give your agent email in 5 minutes
30-day money-back guarantee. Cancel anytime.