Ark Key Features

AI-Readable Documentation

Every doc page is available as clean Markdown (add .md to any URL), reducing token usage for LLMs and enabling AI coding assistants to generate correct integration code without hallucinations.

Native MCP Server (26 tools)

Optional MCP server with 26 tools lets AI agents (Claude, Cursor, Windsurf, etc.) manage email operations natively — send, verify, manage lists and suppression without wrapper code.

High-Performance Delivery & Deliverability

Sub-second email delivery with 99.9% deliverability backed by automatic SPF, DKIM, and DMARC configuration and real-time webhooks for delivery, opens, clicks, and bounces.

SDKs & Integrations

Official SDKs for Python, Node.js, Ruby, and Go plus SMTP relay support and seamless integrations with Supabase edge functions, Vercel serverless, n8n, and common automation pipelines.

Simple, Predictable Pricing

Straightforward pay-per-email pricing ($0.50 per 1,000 emails), $5 free credits to start, no tiers or surprise enterprise calls — designed for predictable developer usage.