Send outbound postal mail via API + MCP
This is the wedge that is already live: agents and software can prepare documents, enforce approval gates, and trigger print-and-mail workflows while the managed receiving-address product comes online.


Certified Letters
Legal proof of delivery for demand letters, compliance notices, and inbound-mail responses.
Demand Letters
Debt collection notices with certified tracking and proof of service for compliance.
Legal Notices
Compliance notices, cease-and-desist letters, and regulatory responses on deadline.
Real Estate Offers
Acquisition letters, LOIs, and follow-ups from forwarded owner packets or offer mail.
Postcards & Outreach
Permit-triggered postcards, before-and-after mailers, and visual direct mail campaigns.
Property Notices
Lease violations, rent reminders, move-out notices, and cure-or-quit letters.
Business Letters
Invoices, contracts, statements, and partnership letters - printed and mailed from code.
Insurance Claims
Dispute letters, supporting documentation, and certified negotiation correspondence.
Government Filings
Permit applications, license renewals, correction notices, FOIA requests, and regulatory replies.

“Mailbox.bot saves me a ton of time and money regarding mission critical tax correspondence w/ iron clad tracked verification at every step.”

Founder & CEO / Prime ACC Solutions
Culver City, CA

“My office admin agent ‘Clawdius’ (yes that’s his real name) initiates outbound compliance mail, permit filings, and follow up which saves us hours every month as a contractor.”
Los Angeles, CA
You submit documents & letters
We print & handle the post office
Every outbound letter is printed, stuffed, stamped, and mailed by trained facility staff. Fulfillment photos verify every piece. Your agent or app gets structured webhooks at every stage — no post office visits, ever.
Every piece of mail,
structured instantly
Every outbound letter fires webhooks for submitted, ready, mailed, and delivered — with fulfillment photos. Inbound forwarding aliases add mail context, sender context, attachments, and notes to the same account so your agent can prepare the next step without losing the physical-mail trail.
{ event: "mail.received", ref: "MB-7F3A", mail_class: "first_class", sender: "Business Permit", recipient: "Acme Corp Agent", postmark: "Sacramento, CA 95814", scans: ["https://cdn.mailbox.bot/..."], received_at: "2026-03-14T10:17:00Z"}
Frequently
asked
questions
Reserve a mailing address
for your AI agent
Tell us you want your AI agent to have its own mailbox.bot-issued physical mailing and package address. Your reservation stays queued for approved issuance, and you can still start today with the live outbound API and existing-address inbound context.
Address reservations open · send mail today · Existing-address inbound context included
curl -X POST https://mailbox.bot/api/v1/signup \
-H "Content-Type: application/json" \
-d '{"full_name":"Jane Smith","email":"you@co.com","password":"s3cure-pass","needs":"send outbound mail and process forwarded inbound scans"}'Agent-callable account signup: no CAPTCHA and no bearer token on this endpoint. It creates a human-owned account, sends the verification email, and returns the checklist your agent should relay before live credentials or mail sending are possible.
If the operator wants to reserve a new mailbox.bot-issued receiving address, package handling, or a specific launch region, call /api/v1/waitlist first and pass the returned lead_id into signup. Then connect through LangChain, CrewAI, LlamaIndex, Vercel AI SDK, OpenAI Agents SDK, MCP, A2A, or the REST API.

