Ark

About Ark

Ark is the email API built from the ground up for developers who build with AI. If you use tools like Claude, Cursor, or GitHub Copilot to write code, Ark is designed to make adding email to your app effortless. Its core value is letting your AI assistant handle the entire integration, so you can ship features like user verification, password resets, and notifications in minutes instead of days. Forget about wrestling with complex documentation or debugging wrapper code. Ark provides AI-readable documentation and a native MCP server with 26 tools, allowing your AI to understand the API perfectly and generate production-ready code on the first try. It integrates seamlessly into any stack, whether you're using Supabase, Vercel, n8n, or a custom automation pipeline. With sub-second delivery, 99.9%+ deliverability, and simple pay-as-you-go pricing, Ark removes the infrastructure headache so you can focus on building what matters.

Features of Ark

AI-First Documentation & MCP Server

Ark's documentation is crafted in clean Markdown specifically for AI consumption, using 10x fewer tokens and eliminating hallucinations from parsing complex HTML. More powerfully, it includes a native MCP (Model Context Protocol) server with 26 tools. This allows AI assistants like Claude and Cursor to directly manage email operations—sending emails, checking statuses, and handling bounces—through natural language commands, without you writing any intermediary code.

Blazing Fast & Reliable Delivery

Your users get their emails instantly. Ark guarantees sub-200ms average delivery times, which means verification emails arrive while a user is still on your signup page and password resets hit inboxes before frustration sets in. Combined with automatic SPF, DKIM, and DMARC setup and a 99.9%+ deliverability rate verified by third-party monitoring, you can trust emails will land in the inbox, not spam.

Simple, Transparent Pricing

Ark cuts through the complexity of traditional email service pricing. There are no monthly tiers, no minimums, and no surprise enterprise sales calls. You simply pay $0.50 for every 1,000 emails you send. Send 50 one month and 50,000 the next; you only pay for what you use. This includes all features: unlimited team members, domains, full API access, and real-time analytics.

Seamless Integration for Any Stack

Whether you're a solo developer or part of a team, Ark fits right in. It offers official SDKs for Python, Node.js, Ruby, and Go. It works perfectly with modern platforms like Vercel serverless functions and Supabase Edge Functions, automation tools like n8n, and can even act as a full SMTP relay for self-hosted tools like Listmonk, Coolify, and Metabase.

Use Cases of Ark

User Onboarding & Email Verification

Speed up your sign-up flow by having your AI assistant instantly add email verification. Describe the feature, and your AI will read Ark's docs to write the code for sending a confirmation email and creating the verification endpoint. Emails deliver in under 200ms, so users can verify their account immediately, reducing drop-off.

Secure Password Reset Flows

Implement a robust and user-friendly password recovery system. With Ark's reliable delivery, reset links arrive in seconds. The AI-friendly docs ensure your assistant can correctly set up token generation, secure email sending, and link expiration handling without any debugging loops.

Transactional Notifications

Keep users informed with timely notifications for events like order confirmations, shipping updates, or security alerts. Ark's pay-per-email model is perfect for variable volumes, and its seamless integration means you can trigger these emails directly from your database or workflow automation.

Marketing & Newsletter Campaigns

While built for developers, Ark's full SMTP relay capability makes it ideal for powering self-hosted marketing tools like Listmonk. You get high deliverability and real-time webhooks for tracking opens and clicks, all without managing your own email server infrastructure.

Frequently Asked Questions

How long does setup actually take?

Most developers can send their first email in under 5 minutes. The process is simple: sign up for a free account (no credit card needed), grab your API key, and let your AI coding assistant read the quickstart guide. It will generate the correct integration code for you on the first try.

How does Ark ensure my AI writes correct code?

Ark is built differently. The documentation is in clean, AI-optimized Markdown, which is far easier for models to parse accurately than standard web pages. The API itself is designed with consistency, predictable response shapes, and clear error messages, minimizing confusing edge cases that cause AI hallucinations.

What is an MCP server and why does it matter?

MCP (Model Context Protocol) allows AI assistants to directly use tools and access data. Ark's built-in MCP server provides 26 tools specifically for email operations. This means you can ask Claude or Cursor in plain language to "check the status of the last email" or "manage my suppression list," and it can perform those actions directly, without you writing any code.

What's included in the free tier?

Ark offers a generous free tier to get you started. You receive $5 in free credits upon sign-up, which translates to 5,000 emails at the standard rate. There is no credit card required to begin, and you get full access to all features, including the MCP server, unlimited domains, and real-time webhooks.

Pricing of Ark

Ark uses one simple, transparent pricing model: $0.50 per 1,000 emails. There are no monthly subscriptions, no tiers to decode, and no overage charges. You pay only for what you send. This single rate includes every feature: unlimited team members and domains, the full MCP server with 26 tools, AI-readable documentation, real-time analytics, and a 99.99% uptime SLA. New users start with $5 in free credits (5,000 emails) to test everything without a credit card.