Ark

About Ark

Ark is the foundational email API engineered for the modern, AI-native development workflow. It eliminates the traditional friction of integrating email functionality by being the first platform built from the ground up for AI coding assistants like Claude Code, Cursor, and Windsurf. Its core value proposition is enabling developers to ship email-dependent features—such as user verification, password resets, and notifications—in minutes instead of days. This is achieved through AI-readable documentation that drastically reduces token usage and a native MCP (Model Context Protocol) server with 26 tools, allowing AI agents to understand and execute email operations directly through natural language prompts, without requiring developers to write wrapper code. Designed for developers who automate with code and ship with AI, Ark integrates seamlessly into any stack, including Supabase edge functions, n8n workflows, Vercel serverless, and more. It provides enterprise-grade deliverability with sub-second latency, automatic email authentication (SPF, DKIM, DMARC), and real-time webhooks, all under a simple, transparent pay-per-email pricing model with no monthly tiers or commitments.

Features of Ark

AI-First Documentation & MCP Server

Every piece of Ark's documentation is available in clean, AI-optimized Markdown format, cutting token usage by 10x and eliminating hallucinations caused by parsing complex HTML. Coupled with a native MCP server exposing 26 tools, this allows AI assistants to deeply understand the API, generate correct integration code on the first try, and even manage ongoing email operations like checking delivery status or handling bounces through natural language commands within your IDE.

Seamless Stack Integration & Universal SDKs

Ark is built to plug directly into your existing automation pipelines without friction. It offers first-class integration patterns for popular platforms like Supabase Edge Functions, n8n workflows, and Vercel serverless environments. For custom code, it provides robust and intuitive SDKs for Python, Node.js, Ruby, and Go, ensuring you can implement email functionality regardless of your backend technology stack.

High-Performance Email Delivery Infrastructure

Ark guarantees sub-200ms average delivery times, ensuring transactional emails like verifications and password resets land in the user's inbox almost instantly. This is backed by a 99.9%+ deliverability rate, verified by third-party monitoring, and automatic configuration of critical email authentication protocols (SPF, DKIM, DMARC), removing the need for manual DNS expertise.

Transparent, Usage-Based Pricing & Real-Time Analytics

Ark operates on a straightforward, tier-less pricing model of $0.50 per 1,000 emails sent, with no monthly minimums or overage charges. This is complemented by powerful real-time analytics and webhooks that provide instant feedback on email events such as deliveries, opens, clicks, and bounces, giving developers complete visibility into their email performance.

Use Cases of Ark

AI-Assisted Feature Development

Describe an email feature to your AI assistant (e.g., "add a welcome email sequence for new users"). The AI reads Ark's docs, writes the production-ready integration code for your specific framework, and configures the necessary endpoints. This allows developers to stay in flow, shipping features like onboarding drips or notification systems without context-switching to debug email code.

Transactional Email Automation

Automate critical user journey emails with high reliability and speed. Implement password reset flows, email verification for signups, order confirmations, and security alerts. Ark's sub-second delivery ensures these time-sensitive messages arrive while the user is still engaged with your application, improving user experience and security.

Workflow & Backend Integration

Trigger emails directly from your backend logic or no-code/low-code automation tools. Use Ark with n8n to send a summary email after a workflow completes, from a Supabase Edge Function to notify admins of a new user signup, or from a Vercel serverless function to confirm a form submission, seamlessly connecting email to any event in your stack.

Self-Hosted Application Email Relay

Configure Ark as a full SMTP relay for self-hosted tools that require email capabilities. Provide reliable, authenticated email delivery for applications like Listmonk (newsletters), Coolify (deployment notifications), or Metabase (scheduled reports), upgrading their default email functionality without managing your own mail server.

Frequently Asked Questions

How does Ark work with AI coding assistants?

Ark provides AI-optimized documentation in Markdown format and a native MCP server. When you prompt your AI assistant (like Cursor or Claude Code) to add an email feature, it reads our concise docs, understands the API structure, and generates correct, working code for your SDK of choice. The MCP server allows the AI to perform live email operations directly within your IDE.

What is the actual setup time for Ark?

Most developers can send their first email 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 integrating using one of our SDKs or via the MCP server with your AI assistant.

How does Ark ensure high email deliverability?

Ark automatically sets up and manages the essential email authentication standards—SPF, DKIM, and DMARC—for your domain. This tells mailbox providers your emails are legitimate. Combined with dedicated infrastructure and best-practice sending patterns, this results in a consistent 99.9%+ deliverability rate, which is independently verified by third-party monitoring services.

Can I use Ark for bulk marketing emails?

Ark is primarily optimized for transactional and automated emails (verification, notifications, alerts) where speed and deliverability are critical. While you can send bulk emails, its pay-per-email model is most cost-effective for automated, event-triggered messaging. For large-scale marketing campaigns, a dedicated bulk email service might offer more specialized features.

Pricing of Ark

Ark offers simple, transparent pricing with no monthly tiers, minimums, or enterprise sales calls. You pay only for what you send at a rate of $0.50 per 1,000 emails. Every account starts with $5 in free credits (equivalent to 5,000 emails), and there is no requirement for a credit card to begin. This model includes unlimited team members, unlimited domains, access to the full MCP server with 26 tools, AI-readable documentation, real-time analytics, and a 99.99% uptime SLA.