AI email agent
Build the agent, not the inbox
You write the part that thinks. We give you the email pieces it reads and answers with.
Email in
- Categorieshuman
- Threading3 messages
- Reply textnew words only
- AttachmentsPDF → .md
Your code
Your agent
Prompts, tools, judgement
agent.run(thread)
Email out
- Mailboxesas nora@gmail
- Sending hours09:00–18:00
- Pacing3 / hour
Categories
Only wake up for people
Every email arrives labelled. Newsletters, bounces and out-of-office replies never cost you a model call.
Categories- marketing
Sendhive
50% off enterprise seats, this week only
- out of office
Dana Ruiz
Out of office until Friday
- bounce
Mail Delivery System
Delivery Status Notification (Failure)
- human
Marco Lind
Re: RFQ 4471 — can you do 3mm?
Threading
Hand it the whole conversation
Replies, forwards and renamed subjects land in one thread. One call gets your agent everything that was said.
Threadingthr_8kx2 · 3 messages
You
RFQ 4471 — our quote
Marco Lind
Re: RFQ 4471 — can you do 3mm?
- new subject
Dana Ruiz
Fwd: Quote for sheet metal
Reply text
Read what they wrote, not the quote
Each message comes with just its new words. Your agent doesn't reread the conversation in every quote.
Reply textYes, 3mm works. Can you ship by the 14th?
writtenOn Tue, Nora Berg wrote:
Our quote for RFQ 4471 is attached. Brushed 2mm sheet…
Attachments
Read the PDF too
PDFs, sheets and scans arrive as Markdown next to the email. Your agent reads the quote, not a file name.
AttachmentsQuote-4471.pdf
Lind Metall GmbH
Industriestraße 14
44536 Lünen, Germany
Northwind GmbH
Attn: Nora Berg
Quote Q-4471
31 Aug 2026
| # | Item | Qty | Price |
|---|---|---|---|
| 1 | Sheet 3mm | 500 | €4.20 |
| 2 | Cutting | 500 | €0.35 |
- Net
- €2,275.00
- VAT 19%
- €432.25
- Total
- €2,707.25
Delivery: 10 working days from order.
Payment: 30 days net.
Quote-4471.pdf.md
LLM-ready<!-- Page 1 --> Lind Metall GmbHIndustriestraße 1444536 Lünen, Germany Northwind GmbHAttn: Nora Berg # Quote Q-4471 31 Aug 2026 | # | Item | Qty | Price || - | --------- | --- | ----- || 1 | Sheet 3mm | 500 | €4.20 || 2 | Cutting | 500 | €0.35 | Net €2,275.00VAT 19% €432.25Total €2,707.25 Delivery: 10 working days from order.Payment: 30 days net.
Mailboxes
Answer from your user's own inbox
One click at Google or Microsoft, and your agent reads and replies as them. Same API as your own domain.
MailboxesYour users’ inboxes
- nora.berg@gmail.comconnected
- jonas@northwind.ioconnected
Sending hours
Never email at 3am
Your agent runs all night. Anything it sends outside your working hours waits, and goes out when the day starts.
Sending hoursWeekdays 09:00–18:00
Pacing
A runaway loop can't flood anyone
Cap what one person can receive. If your agent misfires, the extra replies wait instead of landing.
Pacing8 replies to marco@lindmetall.de in one hour
Put together
Your agent, in two calls
export async function POST(request: Request) { const event = await verifyWebhookRequest(request, secret) if (event.type === "email.received" && event.data.category === "human") await queue.push(event) return ok()}const thread = await aiinbx.threads.retrieve(event.data.thread_id) const answer = await agent.run(thread.messages) await aiinbx.threads.reply(thread.id, { text: answer })Or hand it to Claude Code, Cursor or Codex. It reads our docs and writes this for you.