What is mailbox.bot, in plain English?

mailbox.bot is postal mail infrastructure for agentic businesses. It lets software decide when mail should be sent, dispatch it through an API, and keep the workflow moving when proof, delivery status, or inbound postal mail comes back.

What can we automate today?

You can send letters, postcards, notices, and documents through the outbound API today. You can also use a virtual mailbox so inbound postal mail can be received, scanned, and routed back into the workflow, and higher-volume package workflows can be scoped when needed.

Do I need a virtual mailbox to start?

No. The outbound-only plan is the cleanest starting point if you already know what should be mailed. Add the virtual mailbox when the workflow needs a real receiving address and a scanned return path.

Why is this better than a traditional mail house or portal?

Traditional mail tools usually end with a human uploading files and hoping for the best. mailbox.bot keeps the physical step attached to live data, approvals, proofs, and whatever should happen next in software.

How does human oversight work?

Humans still handle identity, payment, and any approval gate you want. The agent can drive the workflow, but sensitive actions can pause until a person reviews them in the dashboard.

[Postal mail API]

send physical postal mail from your AI agent

Postal mail API for AI agents. Send certified mail, letters, notices, and postcards — we print, stamp, and mail them. Inbound agent mailbox addresses in private beta

Scanning a mailpiece QR code with a phone for mailbox.bot

ship to — mailbox.bot · southern californiaV1.0
mailbox.bot facility
Ref: MB-7F3A
SoCal Facility, CA
WEBHOOKPHOTOSTOREFORWARD

[Use cases]

What your agent automates

One API for every kind of postal mail your business sends. Your agent drafts it, we print, stuff, stamp, and mail it — letters, postcards, certified mail, anything.

USPSFedExUPS

Agentic postcards — printed and mailed via API

Real estate offer letter — generated and mailed via API

Certified Letters

Legal proof of delivery for demand letters, compliance notices, and court filings.

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 purchase offers personalized per property and owner.

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, FOIA requests, and regulatory submissions.

View all use cases

CONNECT

Hook up your agent

Grab API keys or install the MCP server. Three fields, no CAPTCHA.

SEND

Your agent sends mail

Submit a PDF via API or MCP. We print it, stuff the envelope, apply postage, and mail it. Photo proof included.

SCAN

Inbound mail, scanned and classifiedprivate beta

We receive, scan, and webhook every piece to your agent with sender, postmark, and extracted data.

Mail processing facility with sorting shelves and workstation

[Human-grade logistics]

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.

PDFs printed and stuffed with your return address

Postage applied — USPS, FedEx, or UPS

Fulfillment photos verify every mailed piece

Webhooks fire: submitted → ready → mailed → delivered

[Agent protocol]

Every piece of mail,
structured instantly

Every outbound letter fires webhooks for submitted, ready, mailed, and delivered — with fulfillment photos. Inbound receiving addresses add scan-on-arrival webhooks with sender, postmark, and extracted data. Your agent acts on mail without waiting for you.

senderrecipientmail_classpostmarkscanstimestamp

View API docs

POSTyour-agent.example.com/mail-webhook200 OK

{
  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"}

[All major carriers supported]

USPSFedExUPSDHLAmazonOnTracLaserShipGSO

[Works with your agent framework]

LangChainCrewAILlamaIndexVercel AI SDKOpenAI Agents SDKMCP

Ready to automate your mail?

Outbound API is live today. Inbound addresses require identity verification, Form 1583, and facility approval. Start sending in under 2 minutes.

Start for free

from $0/mo

[FAQ]

Frequently
asked
questions

mailbox.bot is postal mail infrastructure for businesses, operators, and AI agents. You can submit a PDF and have us print, stuff, apply postage, and mail it, add a real mailbox address for inbound mail, and connect every step back to your workflow through webhooks, API, MCP, and A2A.

Send Mail is outbound only: submit a PDF, notice, postcard, or document, and we print it, stuff it, apply postage, and mail it using your return address. Mailbox adds a real receiving address for inbound mail, scan-on-arrival, and the same outbound workflow from one place.

If your workflow also needs recurring package intake, storage, forwarding, or warehouse-style handling, tell us your volume and we will route you into the right setup. The core product stays clean, and higher-volume logistics can still plug into the same operating flow.

Yes. mailbox.bot has integration guides for LangChain, CrewAI, LlamaIndex, Vercel AI SDK, and OpenAI Agents SDK. It also supports MCP, A2A, REST API, webhooks, and OpenClaw. Your agent can react to inbound scans, trigger outbound sends, and keep the physical step attached to live software state.

Common flows include legal notices, invoices, postcards, renewals, partnership letters, certified responses, inbound document routing, and higher-volume logistics follow-up. Rules decide what to scan, send, hold, forward, or escalate, and the dashboard keeps a human in the loop.

Every account goes through identity verification. Outbound-only sending is the fastest path — no notarization required. Inbound receiving addresses require Form 1583 notarization and facility approval, because mailbox.bot handles real postal mail under USPS CMRA regulations. If your team has a larger logistics workflow, we scope that separately.

Send Mail starts at $0/mo plus $0.30/page printing and actual postage — live now. Mailbox is $5/mo for inbound receiving plus outbound access, opening in private beta. Higher-volume package workflows are scoped to fit your volume and handling requirements.

No. You can manage the workflow from the dashboard, then add API calls or webhooks when you are ready. Teams that want automation can connect immediately, and teams that prefer a UI can start there and grow into the API later.

[Get started]

Give your agent a
physical presence

Create your account, connect your agent, and start sending mail today. Request an inbound receiving address as they open in private beta.

Mailbox $5/mo · Send mail $0/mo base · Higher-volume package workflows on request

POST/api/v1/signupCURL

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"}'

Autonomous signup — no CAPTCHA, no auth header. Then integrate with LangChain, CrewAI, LlamaIndex, Vercel AI SDK, or OpenAI Agents SDK.

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