Ark

About Ark

Ark is the email API that finally speaks your AI's language. Built from the ground up for developers who live in their AI coding assistants, Ark cuts through the noise of traditional email infrastructure. It's not just another API wrapper; it's a native MCP server packed with 26 tools that let Claude, Cursor, Windsurf, and Claude Code send emails through pure, natural language prompts. No more wrestling with wrapper code or debugging brittle integrations. Your AI reads Ark's purpose-built, AI-optimized documentation—crafted in clean Markdown to slash token usage by 10x—and generates production-ready code that just works, on the first try. It's for builders who want to ship features like user verification, password resets, and transactional notifications in minutes, not days, and then move on. With sub-second delivery, 99.9% deliverability on autopilot, and a dead-simple pay-per-email model, Ark is the tool that gets out of your way so you can build.

Features of Ark

AI-First MCP Server

Ark ships with a native Model Context Protocol server equipped with 26 powerful tools. This lets your AI coding assistant (like Claude or Cursor) directly manage email operations—sending, checking status, handling bounces—through natural language conversation. It’s deep, direct control without you ever writing a line of boilerplate integration code. Your AI becomes a full-stack email engineer.

AI-Readable Documentation

Forget HTML-parsed docs that confuse LLMs and burn tokens. Every page of Ark's documentation is available in clean, structured Markdown—just add .md to any URL. This AI-native format reduces token consumption by 10x and eliminates hallucinations, ensuring your assistant generates accurate, working code from the very first prompt.

Blazing-Fast, Reliable Delivery

Emails aren't just sent; they're delivered. Ark guarantees sub-200ms average delivery times, meaning verification emails hit the inbox while the user is still on your signup page. Combined with automatic SPF, DKIM, and DMARC setup, it achieves a 99.9%+ deliverability rate, verified by third-party monitoring. Your emails land, instantly.

Transparent, Usage-Based Pricing

Ditch the monthly tiers and enterprise sales calls. Ark has one simple price: $0.50 per 1,000 emails. You pay only for what you send, whether it's 50 or 50,000. It includes everything—unlimited domains, team members, the full MCP suite, and real-time analytics. Start with $5 in free credits and scale without surprise bills.

Use Cases of Ark

AI-Powered Feature Shipping

Describe a feature like "add email verification to my Next.js app" to your AI assistant. It reads Ark's docs, writes the helper functions, integrates the SDK, and sets up the endpoint—all in one fluent session. You ship a complete, production-ready email flow in minutes without ever leaving your editor or context-switching to debug.

Automating Workflow Notifications

Integrate Ark seamlessly into your automation stack like n8n workflows, Supabase Edge Functions, or Vercel serverless functions. Trigger transactional emails—order confirmations, status updates, admin alerts—directly from your pipeline events. It’s the reliable connective tissue for your event-driven architecture.

Self-Hosted Application Integration

Use Ark as a full SMTP relay for your self-hosted tools like Listmonk, Coolify, or Metabase. Point your application's SMTP settings at Ark and instantly upgrade your deliverability and gain real-time analytics without migrating your entire stack. Get enterprise-grade email for your homelab.

Rapid Prototyping & MVPs

When you're building the next big thing, you can't get bogged down in email config. With Ark's free tier (5,000 emails) and 5-minute setup, you can instantly add critical communication channels to your prototype. Validate your idea with real user emails from day one, with no cost or complexity barriers.

Frequently Asked Questions

How long does setup actually take?

Most developers send their first email in under 5 minutes. Sign up, grab your API key, and let your AI assistant do the rest using the MCP tools or the SDK. There's no complex DNS wizardry needed upfront—Ark handles the heavy lifting automatically.

How does the AI integration actually work?

Ark is built for AI comprehension. Your assistant (Cursor, Claude Code, etc.) accesses our MCP server for direct tool use or reads our clean Markdown docs. The consistent API design and AI-optimized content let it generate correct, functional code immediately, eliminating the back-and-forth typical with other APIs.

What makes the deliverability so good?

Ark automatically configures the critical authentication protocols (SPF, DKIM, DMARC) for your domain, which are the golden tickets to the inbox. Combined with optimized infrastructure and reputation management, this ensures a 99.9%+ deliverability rate, constantly verified by independent monitoring services.

Can I use Ark with my existing codebase?

Absolutely. Ark is stack-agnostic. Use the native MCP server for AI-driven development, or drop our SDKs (Python, Node.js, Ruby, Go) directly into your existing Supabase, Vercel, or custom backend. It also works as an SMTP relay, making it a drop-in replacement for your current email service.

Pricing of Ark

Ark believes in radical simplicity: one price for everything. Pay only for what you use at a rate of $0.50 per 1,000 emails. There are no monthly tiers, no minimums, and no feature gates. Every plan includes unlimited domains, unlimited team members, the full 26-tool MCP server, AI-readable docs, and real-time analytics. Start for free with $5 in credits (5,000 emails)—no credit card required. Scale up or down; your cost always aligns directly with your volume.