# MailStream (mailstream.app)

Prints and mails physical direct mail pieces through a REST API, MCP server or HTML-based design tool.

- Atlas card: https://inite.ai/en/atlas/mailstream.app
- Site: https://mailstream.app
- For: Developers and AI agents sending physical mail, plus marketing teams running direct mail campaigns
- Use not measured/100 · alive 100/100

## Used for

- Send postcards and letters through a single API call
- Mail every home within a chosen radius of an address
- Track each piece from printed to shipped to delivered

## Price

- from 99 USD/month, free plan (read 2026-10-19 on https://mailstream.app/pricing)

## For developers

- API docs: https://mailstream.app/developers/api
- MCP server: app.mailstream/mailstream (namespace; auth on 2026-10-19)
- Read 2026-10-19

## MCP server, measured daily

Server: https://my.mailstream.app/mcp, checked every day since 2026-10-19 (3 checks).

- Answered: measuring, 3 daily checks so far
- Median first answer: 356 ms
- Sign-in: OAuth (the client signs the user in)
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: soc2, hipaa, hitrust, ccpa, gdpr
- Read 2026-10-19

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