Product

Outbound mail API for letters, postcards, notices, and batch sends

This is the product surface you use when the system already knows what should be mailed and just needs a reliable way to turn that decision into a physical piece.

Submit a PDF, postcard creative, or batch mailing job through an API and mailbox.bot handles printing, stuffing, postage, and mailing. The key difference from legacy mail vendors is that this can live directly inside an agentic workflow instead of behind a separate portal process.

agentic-mail-loop
system eventdocument or creativeapi sendproof and statusnext action
Works for
letters, postcards, notices, batch campaigns
Dispatch model
api-first instead of portal-first
Return signal
status, proof, and future inbound loops
Capability Map

What the product gives you

What triggers the send?

Any system event, agent decision, queue item, schedule, or campaign rule can create a physical mail action.

What can be mailed?

Single letters, postcards, legal notices, document packets, certified mail, and higher-volume mail jobs.

How does it fit in software?

The send is an API call, so your existing workflow owns approvals, timing, payload generation, and retries.

What proof comes back?

Submitted, ready, mailed, delivered, and related fulfillment proof can return as structured status changes.

Who is this for?

Teams automating outreach, follow-up, compliance mail, legal operations, customer notices, and direct mail workflows.

Why not just use a portal?

Because the moment a human has to switch tools, the mail lane becomes slower, harder to personalize, and harder to attach back to the system of record.

Flow

How teams use it

1
Generate the mail payload

An agent, internal service, or operator workflow assembles the document, address data, and any approval context.

2
Send through the API

mailbox.bot accepts the mail request directly from software instead of requiring a manual portal session.

3
Track physical execution

The system gets status updates and proof so the physical step stays visible inside the workflow.

4
Chain the next action

A follow-up task, CRM update, or second touch can depend on the mail status instead of waiting on human checking.

Comparison

Portal mail vendor vs. API-first mail surface

The difference is not just developer convenience. It changes what kinds of workflows are practical.

DimensionTraditional mailAgentic mail
Send pathOperators upload files through a GUI or a separate campaign tool.Mail is just another operation in the workflow stack.
ApprovalsApproval happens outside the system in ad hoc email or chat.Approval rules can stay inside the same workflow that generated the send.
PersonalizationPersonalization is constrained by the vendor interface or batch structure.The payload is generated by your own logic before the API call.
Status handlingTeams check a dashboard later to see what happened.The workflow can listen to status and react immediately.
Future loop closureInbound responses are a separate problem.The outbound surface is designed to pair with inbound mailbox automation later.
Operator Lens

Use this when

You want software or agents to send physical mail without detouring through a GUI.
You already know what should be mailed and want proof and status to stay attached to the workflow.
You plan to grow into a closed-loop mail stack where outbound and inbound belong to the same system.
Related

Keep exploring the stack

Build The Loop

Let physical mail live inside the same workflow as everything else.

Use the deeper proof pages for vertical value. Keep the homepage clean. Let the agentic thesis do the framing.