# Docupost AI integration on Definable

> DocuPost is a print and mail service that enables users to send digital files as physical letters and postcards via the U.S.

## What this connects

DocuPost is a print and mail service that enables users to send digital files as physical letters and postcards via the U.S. Postal Service.

Vendor: https://docupost.com/

## Tools available

**3** tools available. First 3:

- `DOCUPOST_GET_BALANCE` — Get Balance — Tool to check the current account balance in DocuPost. Use this before sending letters or postcards to verify sufficient funds are available.
- `DOCUPOST_SEND_LETTER` — Send Letter — Send a physical letter via U.S. mail using DocuPost. Requires recipient address (to_name, to_address1, to_city, to_state, to_zip), sender address (from_name, from_address1, from_city, from_state, from_zip), and a PDF document URL. Example: send_letter( to_name='John Doe', to_address1='123 Main St', to_city='Los Angeles', to_state='CA', to_zip='90210', from_name='Sender Corp', from_address1='456 Sender Rd', from_city='Los Angeles', from_state='CA', from_zip='90210', pdf='https://example.com/document.pdf' )
- `DOCUPOST_SEND_POSTCARD` — Send Postcard — Tool to send a postcard via U.S. mail with specified recipient, sender, and front/back images. Use after confirming recipient addresses and design URLs. Example: send_postcard(to_name='John Doe', ..., front_image='https://...', back_image='https://...')

## Auth

Auth schemes: `API_KEY`.

## How agents use Docupost

Inside a Definable workflow, Docupost is one of the tools the **Distributor specialist** can call. Example coordination patterns:

- **Researcher → Docupost** — the Researcher (GPT-5.5) pulls context from Docupost (records, threads, documents), synthesises findings, and briefs the rest of the team.
- **Writer → Distributor → Docupost** — the Writer (Claude Opus 4.7) drafts copy in brand voice, the Verifier passes it, then the Distributor writes the result into Docupost (create record, post message, draft email).
- **Designer / Engineer → Distributor → Docupost** — the Designer ships an asset or the Engineer ships a code change, the Distributor delivers it via Docupost (attach file, open PR comment, post status).

The Verifier checks every Docupost call. On rate limit, schema drift, or auth refresh it self-heals and retries — the workflow completes without manual intervention.

## Categories

- documents — https://definable.ai/apps/category/documents/

## Related

- HTML page: https://definable.ai/apps/docupost/
- Same category (documents): https://definable.ai/apps/category/documents/
- All integrations: https://definable.ai/apps/
- Workflow (multi-agent loop): https://definable.ai/workflow/
- Apps llms.txt index: https://definable.ai/llms-apps.txt