Ark

About Ark

Ark is the revolutionary email API built from the ground up for the AI-first developer. It's the infrastructure that lets you ship email features like verification, password resets, and notifications in minutes, not days, by letting your AI coding assistant do the heavy lifting. Designed for developers using Claude Code, Cursor, Windsurf, and other AI agents, Ark provides AI-readable documentation and a native MCP server with 26 tools. This allows your AI to understand email operations and generate production-ready integration code through natural language prompts, eliminating wrapper code, debugging, and context-switching. Beyond AI, it integrates seamlessly with any stack—Supabase, n8n, Vercel, or custom automation pipelines—via SDKs for Python, Node.js, Ruby, and Go. With a relentless focus on performance and simplicity, Ark guarantees sub-second email delivery, 99.9%+ deliverability with automatic security setup, and transparent, tier-free pricing. It’s built for developers who want to automate with code, ship features fast, and never think about email infrastructure again.

Features of Ark

AI-First Documentation & MCP Server

Every piece of Ark's documentation is available in clean, AI-friendly Markdown format, cutting token usage by 10x and eliminating hallucinations from parsing complex HTML. Coupled with a native MCP server offering 26 tools, this feature allows Claude, Cursor, and Windsurf to directly read, understand, and execute email-related tasks. Your AI can generate correct, working code on the first try, managing everything from sending emails to checking delivery status and handling bounces through simple natural language commands.

Blazing-Fast, Reliable Delivery

Ark is engineered for speed and reliability, ensuring your critical transactional emails land instantly. With an average delivery time under 200ms, verification emails arrive while users are still on your signup page, and password resets hit inboxes before frustration sets in. Backed by a 99.99% uptime SLA and 99.9%+ deliverability verified by third-party monitoring, Ark automatically configures SPF, DKIM, and DMARC so your messages avoid spam folders without requiring any DNS expertise from you.

Simple, Transparent Pricing

Ditch confusing monthly tiers and enterprise sales calls. Ark offers one straightforward price: $0.50 per 1,000 emails sent. There are no monthly minimums, no overage charges, and no feature gates. You pay only for what you use, whether it's 50 emails or 50,000. This model includes unlimited team members, unlimited domains, full API access, and the complete MCP server, making it a favorite among developers tired of decoding complex pricing plans.

Universal Integrations & SDKs

Ark fits perfectly into your existing workflow. It provides first-class SDKs for Python, Node.js, Ruby, and Go for custom code integration. For no-code and low-code scenarios, it seamlessly plugs into Supabase Edge Functions, n8n workflows, and Vercel serverless functions. Furthermore, it offers a full SMTP relay for self-hosted tools like Listmonk, Coolify, and Metabase, ensuring you can connect Ark to virtually any part of your stack.

Use Cases of Ark

AI-Powered Feature Implementation

Describe an email feature to your AI assistant, like "add email verification to my signup flow." The AI reads Ark's docs, writes the necessary helper functions, installs the SDK, and integrates the email trigger into your auth handler—all in one flow. This cuts development time from hours or days to mere minutes, allowing you to stay focused on your core product logic without ever leaving your editor.

Transactional Email Automation

Automate all critical system emails with confidence. Use Ark to send instant user onboarding sequences, password reset links, security alerts, payment receipts, and order notifications. Its sub-second delivery and high inbox placement rate ensure these time-sensitive communications are received immediately, improving user experience and security.

Workflow & Notification Systems

Integrate Ark into your automation pipelines to send dynamic notifications. Trigger emails from database events in Supabase, automate customer follow-ups from n8n, or send deployment alerts from Vercel. The robust webhook system provides real-time feedback on deliveries, opens, and clicks, enabling you to build sophisticated, data-driven communication workflows.

Self-Hosted Application Integration

Connect your preferred self-hosted tools to a modern, reliable email backend. Use Ark's SMTP relay to power newsletters from Listmonk, system alerts from Coolify, or report distributions from Metabase. This gives you the deliverability and analytics of a top-tier email API while maintaining full control over your application stack.

Frequently Asked Questions

How long does setup actually take?

Most developers send their first email with Ark in under 5 minutes. The process involves signing up for a free account (no credit card required), adding and verifying your sending domain with automatic DNS configuration, and then using the AI-friendly docs or an SDK snippet to make your first API call. The intuitive design and predictable API mean you're up and running almost instantly.

How does Ark ensure my AI writes correct code?

Ark is built specifically for AI comprehension. The documentation is structured in clean Markdown, which is 10x more efficient for AI to process than standard web docs, reducing token waste and preventing parsing errors. The API itself is designed with consistent response shapes, clear error messages, and sensible defaults, eliminating surprise edge cases that typically cause AI-generated code to fail.

What makes Ark different from SendGrid or Resend?

Ark is fundamentally built for the AI-era developer. Key differentiators include its native 26-tool MCP server for direct AI control, truly AI-readable documentation, and a simple pay-per-email pricing model with no monthly tiers. While others offer limited AI features or complex plans, Ark provides everything—unlimited domains, team members, and full features—at one transparent price that scales directly with your usage.

What is included in the free tier?

Ark offers a generous free tier to get started. New users receive $5 in free credits, which translates to 5,000 emails at the standard rate. This includes full access to the API, all SDKs, the MCP server, AI documentation, and unlimited domains. There's no credit card required to start, and you only begin paying once you've exhausted your initial credits.

Pricing of Ark

Ark believes in simple, transparent pricing. There is only one plan with one price: $0.50 per 1,000 emails sent. You pay only for what you use, with no monthly fees, no tiers, and no overage charges. This single rate includes all features: unlimited team members, unlimited domains, the full MCP server with 26 tools, AI-readable documentation, real-time analytics, and a 99.99% uptime SLA. Start for free with $5 in credits (5,000 emails) when you sign up, no credit card required.