# Sendinel (sendinel.ai)

Runs email campaigns, contacts and analytics for AI agents over MCP or REST, sending through Resend, SendGrid, Postmark, SES or Mailgun.

- Atlas card: https://inite.ai/en/atlas/sendinel.ai
- Site: https://sendinel.ai
- For: Teams who want AI agents like Claude to run email campaigns across their existing email provider
- Categories: marketing
- Use 0/100 · alive 100/100

## Used for

- Create win-back campaigns for subscribers inactive 90 days
- Review AI-drafted emails before approving and sending
- Send transactional emails through the REST API

## Price

- from 19 USD/month, free plan (read 2026-10-27 on https://sendinel.ai/pricing)

## For developers

- OpenAPI: https://sendinel.ai/openapi.json (202 paths)
- API docs: https://sendinel.ai/developer
- MCP server: ai.sendinel/mcp-server (namespace; auth on 2026-10-27)
- Read 2026-10-27

## MCP server, measured daily

Server: https://sendinel.ai/mcp, checked every day since 2026-10-27 (1 checks).

- Answered: measuring, 1 daily checks so far
- Median first answer: 498 ms
- Sign-in: OAuth (the client signs the user in)
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: ccpa, gdpr
- Read 2026-10-27

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