# MailInApp (mailinapp.com)

Builds email campaigns where readers vote, take quizzes and check out inside the message, with fallback layouts per inbox.

- Atlas card: https://inite.ai/en/atlas/mailinapp.com
- Site: https://mailinapp.com
- For: marketing and lifecycle teams sending campaigns and automation flows through their ESP
- Categories: marketing
- Use 0/100 · alive 100/100

## Used for

- collect votes and quiz answers inside the email
- sell products with one-tap checkout in email
- book webinar signups without a landing page

## Price

- from 5 USD/month, free plan (read 2026-10-20 on https://mailinapp.com/pricing)

## For developers

- OpenAPI: https://mailinapp.com/openapi.json (20 paths)
- API docs: https://mailinapp.com/docs/developers/quickstart
- MCP server: com.mailinapp/mcp (namespace; auth on 2026-10-20)
- Read 2026-10-20

## MCP server, measured daily

Server: https://mailinapp.com/api/mcp, checked every day since 2026-10-20 (2 checks).

- Answered: measuring, 2 daily checks so far
- Median first answer: 276 ms
- Sign-in: OAuth (the client signs the user in)
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: none
- Read 2026-10-20

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