Ark

About Ark

Ark is the definitive email API built from the ground up for the AI-first development era. It empowers developers and their AI coding assistants—like Claude, Cursor, and Windsurf—to integrate robust email functionality through natural language, eliminating the traditional grunt work of email infrastructure. The core innovation is its AI-native design: featuring a comprehensive MCP server with 26 tools for direct AI control and documentation available in clean Markdown that cuts token usage by 10x, ensuring AI agents generate correct, production-ready code on the first attempt. Built for developers who prioritize shipping features, Ark seamlessly integrates into any modern stack, including Supabase, n8n, and Vercel, with full SDK support. It guarantees sub-second email delivery with 99.9% deliverability, automated security setup, and real-time analytics. With a radically simple pay-per-email pricing model and a generous free tier, Ark removes all friction, allowing teams to automate transactional emails like verification and password resets in minutes and scale effortlessly without hidden costs or complex tiers.

Features of Ark

AI-Native MCP Server

Ark includes a native Model Context Protocol server with 26 dedicated tools, allowing AI assistants like Claude and Cursor to directly manage email operations. Your AI can send emails, check delivery status, handle bounce management, and manage suppressions through natural language commands, enabling deep workflow automation without requiring you to write wrapper code or manually build integrations.

AI-Readable Documentation

Every page of Ark's documentation is available as clean, structured Markdown by simply appending .md to any URL. This format is optimized for AI comprehension, using 10x fewer tokens than standard HTML documentation and eliminating hallucinations or parsing errors. This ensures your AI coding assistant can accurately understand and implement the API, generating working code on the first try.

Sub-Second Email Delivery

Engineered for speed, Ark delivers emails with an average latency of under 200 milliseconds. This means critical transactional emails like user verification codes or password reset links arrive in the user's inbox almost instantly—while they are still engaged on your site—dramatically improving user experience and reducing support tickets.

Transparent Pay-Per-Email Pricing

Ark eliminates complex tiers and monthly commitments with a single, straightforward price: $0.50 per 1,000 emails sent. You pay only for what you use, whether it's 50 or 50,000 emails in a month. This model includes unlimited team members, unlimited domains, full API access, and the MCP server, scaling predictably with your application's needs.

Use Cases of Ark

AI-Assisted Feature Development

Describe an email feature to your AI assistant within your IDE. It reads Ark's docs and automatically writes the integration code for sending verification emails, password resets, or notifications. This allows developers to stay in their flow, ship features in minutes, and avoid context-switching to Stack Overflow or debugging faulty email code.

Automating Workflow Notifications

Integrate Ark with automation platforms like n8n or use its SDKs in serverless functions on Vercel or Supabase to trigger emails based on user actions or system events. Send welcome series, payment receipts, security alerts, or internal admin notifications reliably and instantly as part of any automated pipeline.

Self-Hosted Application Integration

Utilize Ark's full SMTP relay capability to power email sending from popular self-hosted tools like Listmonk for newsletters, Coolify for deployment alerts, or Metabase for report distribution. This provides the deliverability and management features of a modern email API to your entire toolkit without managing your own mail servers.

Real-Time Email Analytics

Leverage Ark's webhooks to receive instant, programmatic notifications for email events including deliveries, opens, clicks, and bounces. This data can feed into your analytics dashboard, trigger follow-up actions in your CRM, or help maintain a clean mailing list by automatically suppressing bounced addresses.

Frequently Asked Questions

How long does setup actually take?

Most developers can send their first email with Ark in under 5 minutes. The process involves signing up for a free account, verifying your domain (with automatic SPF/DKIM setup), and installing an SDK. Your AI assistant can then handle the actual integration code immediately using the provided AI-friendly documentation.

How does Ark ensure high email deliverability?

Ark guarantees 99.9% deliverability through automatic configuration of essential authentication protocols (SPF, DKIM, and DMARC) for your domain, maintained infrastructure with positive sender reputation, and real-time monitoring. This ensures your transactional emails consistently land in the primary inbox, not the spam folder.

What makes Ark's documentation "AI-friendly"?

Unlike standard web docs, Ark provides all documentation in pure Markdown format. This structure is cleaner for AI parsers, drastically reducing token count and removing the noise of HTML, JavaScript, and complex layouts. This leads to more accurate code generation by AI assistants without confusion or hallucinations.

Can I use Ark with my existing codebase and tools?

Absolutely. Ark is designed for seamless integration. It offers official SDKs for Python, Node.js, Ruby, and Go, and can be used with any language via its REST API. It fits into edge functions, traditional servers, and automation platforms like n8n. The SMTP relay also makes it compatible with virtually any tool that can send email.

Pricing of Ark

Ark offers simple, transparent pricing with no monthly tiers or hidden fees. The cost is $0.50 per 1,000 emails sent, and you only pay for what you use. This plan includes all features: unlimited team members, unlimited domains, full access to the 26-tool MCP server, AI-readable documentation, and real-time analytics. New users start with $5 in free credits (equivalent to 5,000 emails), with no credit card required to begin.