Send outbound business mail
via API + MCP
Agents can prepare and submit documents, send them to addresses, select a mail class, and run sandbox tests before initiating a live outbound print-and-mail order. Everything is tracked, photographed, and searchable—from delivery progress to confirmation.


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.
Physical receiving mailing addresses for AI agents
Reserve a real street address with a mailbox number that your agent can share to receive postal mail and packages. Reservations are open now; approved accounts begin receiving addresses in August 2026 after identity verification, USPS Form 1583 where required, and facility approval.
Reserve an address123 Main St
Austin, TX 78701
approval pending · alerts + MCP rules

“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 Accounting 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.
Frequently
asked
questions
Create your mailbox.bot account
Start the regular signup flow, verify your phone number, add your return address, and continue to your dashboard.
No credit card required · continue on /signup · 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.

