Ark

About Ark

Ark is the definitive email API architected for the AI-first developer. It transcends traditional email service providers by being intrinsically designed for seamless integration with modern AI coding assistants like Claude, Cursor, and Windsurf. The core value proposition is profound simplicity and developer velocity: you describe an email feature in natural language, and your AI assistant reads Ark's purpose-built documentation to generate production-ready, correct code on the first attempt. This eliminates the tedious cycle of searching, copying, debugging, and context-switching that plagues email integration. Built for developers who prioritize shipping features, Ark offers a robust, enterprise-grade email infrastructure with sub-second delivery and 99.9% deliverability, yet presents it through a radically simple, pay-per-email pricing model. It integrates natively into any stack—be it Supabase, Vercel, n8n, or custom automation pipelines—and provides a full SMTP relay for self-hosted tools, making it the singular, elegant solution for developers who automate with code and refuse to be burdened by email infrastructure.

Features of Ark

Native MCP Server with 26 Tools

Ark provides a fully integrated Model Context Protocol (MCP) server equipped with 26 distinct tools, allowing AI assistants like Claude and Cursor to directly manage email operations. This enables your AI to not just send emails, but also check delivery status, handle bounce management, review analytics, and manage suppressions through natural language commands, all without requiring you to write intermediary wrapper code or build custom integrations.

AI-Optimized Documentation

The documentation is meticulously crafted in clean, AI-readable Markdown format, accessible by simply appending .md to any URL. This structure reduces token consumption by approximately 10x compared to standard HTML documentation, minimizing costs and completely eliminating the hallucinations and parsing errors that AI models often encounter, ensuring the generated code is accurate and functional from the outset.

Sub-Second Email Delivery

Engineered for performance, Ark guarantees an average delivery time of under 200 milliseconds. This ensures critical transactional emails—such as user verification codes, password reset links, and security notifications—arrive in the user's inbox almost instantaneously, dramatically improving user experience and reducing friction during sign-up or account recovery flows.

Transparent, Usage-Based Pricing

Ark operates on a straightforward, principled pricing model: $0.50 per 1,000 emails sent, with no monthly tiers, minimum commitments, or overage charges. This model includes unlimited team members, unlimited domains, full access to the MCP server, and real-time analytics. It is designed to scale perfectly with your application's needs, whether you send 50 or 5,000,000 emails per month.

Use Cases of Ark

AI-Generated User Onboarding Flows

Developers can instruct their AI assistant to implement a complete email verification system for new user signups. The AI reads Ark's docs, generates the code for sending a verification email, and creates the corresponding endpoint to handle the verification link, all in a single, coherent workflow without the developer ever leaving their coding environment or consulting external resources.

Automated Transactional Notifications

Ideal for applications needing to send automated, time-sensitive notifications such as order confirmations, shipping updates, or security alerts. With Ark's rapid delivery and reliable infrastructure, these critical communications are guaranteed to land in the primary inbox instantly, fostering trust and keeping users informed with minimal development overhead.

Password Reset and Account Recovery

Implementing secure and reliable password reset functionality is simplified. Developers can describe the requirement, and the AI will generate the code to send a secure, time-limited reset link via Ark. The sub-second delivery ensures the link arrives while the user is still engaged on the recovery page, streamlining the account recovery process.

Marketing and Newsletter Distribution via SMTP Relay

For teams using self-hosted email marketing tools like Listmonk or Metabase, Ark acts as a high-deliverability SMTP relay. This provides the benefits of Ark's automated SPF, DKIM, and DMARC configuration and superior inbox placement rates to existing tools, ensuring broadcast emails reach their intended audience effectively.

Frequently Asked Questions

How does Ark ensure my AI assistant writes correct code?

Ark's API is designed with exceptional consistency, predictable response shapes, and clear error messages. Coupled with documentation specifically formatted in clean Markdown for optimal AI comprehension, these design choices eliminate ambiguity and edge cases that typically confuse AI models, leading to accurate, working code generation on the first attempt.

What is the setup process and how long does it take?

The setup process is remarkably swift. Most developers can send their first email in under five minutes. It involves signing up for a free account (which includes $5 in credits), adding and verifying your sending domain with automated DNS guidance, and then integrating the SDK. Your AI assistant can handle the majority of the integration code generation directly.

How does Ark achieve such high deliverability rates?

Ark manages all the complex authentication protocols required by modern email providers automatically. Upon domain verification, it automatically configures SPF, DKIM, and DMARC records for you. This, combined with vigilant infrastructure monitoring and best practices, ensures your emails consistently land in the inbox, not the spam folder, with a verified 99.9%+ deliverability rate.

Is there a free tier or trial available?

Yes, Ark offers a generous and fully-featured free tier to begin with. New accounts receive $5 in free credits, which equates to 5,000 emails, with no credit card required for sign-up. This allows developers to fully test the integration, deliverability, and AI-assisted workflow before any financial commitment.

Pricing of Ark

Ark employs a singular, transparent pricing model: $0.50 per 1,000 emails sent. There are no monthly tiers, no minimum fees, and no overage charges. This rate includes access to all features: unlimited domains and team members, the full MCP server with 26 tools, AI-readable documentation, and real-time analytics. New users start with $5 in free credits (5,000 emails) to begin sending immediately without a credit card.