# Postmarkr (postmarkr.com)

Prints and mails business letters via USPS first class from an uploaded PDF or recipient list, after checking addresses against USPS data.

- Atlas card: https://inite.ai/en/atlas/postmarkr.com
- Site: https://postmarkr.com
- For: remote and digital teams sending contracts, invoices and notices by mail without a printer
- Use not measured/100 · alive 100/100

## Used for

- print and mail a contract to a recipient
- send invoices and notices by USPS first class mail
- check recipient addresses before mailing a batch

## Price

- from 2.05 USD/usage, no free plan (read 2026-11-03 on https://postmarkr.com/pricing)

## For developers

- MCP server: com.postmarkr/letters (namespace; auth on 2026-11-03)
- Read 2026-11-03

## MCP server, measured daily

Server: https://postmarkr.com/api/mcp, checked every day since 2026-11-03 (2 checks).

- Answered: measuring, 2 daily checks so far
- Median first answer: 1369 ms
- Sign-in: OAuth (the client signs the user in)
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: pci
- Read 2026-11-03

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Source: INITE Atlas, https://inite.ai/en/atlas/postmarkr.com. JSON: https://inite.ai/api/atlas/postmarkr.com. MCP: https://inite.ai/api/mcp (atlas_lookup).