Sendkit

Sendkit provides an email API and SMTP relay that lets developers and AI agents send transactional messages, run marketing campaigns, and manage drip sequences at scale. The service offers SDKs for many languages—including Laravel, Node.js, Python, PHP, Ruby, Go, .NET, Java, Elixir, and Rust—so integration can be done by dropping in an API key and using familiar mail‑sending code. Real‑time webhooks report deliveries, opens, clicks, bounces, and complaints, while built‑in email validation and suppression handling keep lists clean.

The platform also includes a visual campaign editor with audience segmentation, scheduling, and analytics, allowing marketers to design and monitor bulk email sends without leaving the system. All campaign data and performance metrics are available through the same API, unifying transactional and marketing workflows.

For AI‑driven use cases, Sendkit’s MCP server exposes the email infrastructure to AI agents, enabling them to create contacts, launch campaigns, and retrieve delivery statistics programmatically from compatible clients such as Claude, Cursor, or VS Code. This single‑point solution replaces the need for separate transactional, marketing, and automation tools.