Ark

About Ark

Ark is the email API purpose-built for the modern, AI-first developer workflow. It eliminates the traditional friction of integrating email functionality into applications by being inherently understandable by AI coding assistants like Claude, Cursor, and Windsurf. Its core value proposition is enabling developers to ship email features—such as user verification, password resets, and notifications—in minutes instead of days. This is achieved through AI-readable documentation that cuts token usage by 10x and a native MCP server with 26 tools, allowing AI agents to generate production-ready code and manage email operations through natural language, without wrapper code. Ark delivers robust email infrastructure with sub-second delivery, 99.9% deliverability via automatic SPF/DKIM/DMARC, and real-time webhooks. It integrates seamlessly into any stack, from Supabase and Vercel to n8n, and offers simple, transparent pay-per-email pricing. For developers who build with AI and want to automate with code without managing email complexity, Ark is the essential tool.

Features of Ark

AI-First Documentation & MCP Server

Every piece of Ark's documentation is available in clean Markdown format, designed to be parsed efficiently by AI assistants. This reduces token usage by 10x and eliminates hallucinations from HTML parsing. Coupled with a full MCP server offering 26 tools, AI agents like Claude Desktop can directly read docs, write correct integration code, and manage email operations through natural language commands, all without manual intervention.

Sub-Second Email Delivery

Ark is engineered for speed, boasting an average delivery time of under 200 milliseconds. This ensures critical transactional emails, like verification codes or password reset links, land 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 operates on a simple, tier-free pricing model: $0.50 per 1,000 emails sent. There are no monthly minimums, no unused capacity fees, and no complex tiers that require sales calls. You pay only for what you send, whether it's 50 or 50,000 emails in a month, with everything included.

Guaranteed Deliverability & Real-Time Analytics

Ark handles all the complex infrastructure to ensure emails reach the inbox. It automatically configures SPF, DKIM, and DMARC for your domains, achieving 99.9%+ deliverability verified by third-party monitoring. You get real-time webhooks for delivery, opens, clicks, and bounces, providing full visibility into your email performance.

Use Cases of Ark

AI-Generated Email Integration

Describe an email feature to your AI assistant (e.g., "add a welcome email to my onboarding flow"). The AI reads Ark's docs and autonomously writes the necessary SDK installation, helper functions, and endpoint logic. This allows you to implement verification emails, password resets, or notifications without ever leaving your coding flow or debugging integration code.

Transactional Email for Apps

Ideal for SaaS products and web applications that need reliable, fast transactional email. Use Ark to send automated user onboarding sequences, account verification emails, security alerts, payment receipts, and system notifications directly from your backend, with the confidence they will be delivered in seconds.

Workflow & Automation Pipelines

Seamlessly integrate Ark into no-code/low-code automation platforms like n8n or serverless functions on Vercel, Supabase, or AWS Lambda. Trigger emails based on database events, form submissions, or user actions to create powerful marketing, alerting, and internal notification workflows without managing SMTP servers.

Self-Hosted Tool Integration

Utilize Ark's full SMTP relay capability to power emails from self-hosted tools like Listmonk for newsletters, Coolify for deployment alerts, or Metabase for report distribution. This provides the reliability and deliverability of a professional email API to your entire toolkit without changing how those tools operate.

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 (no credit card required), adding and verifying your sending domain with automatic DNS setup, and then using the AI-friendly docs or SDKs to integrate. The initial $5 in free credits allows for immediate testing.

How does Ark work with AI coding assistants?

Ark is built for AI comprehension. Its documentation is in clean Markdown, which AI models parse efficiently. Furthermore, its native MCP server provides 26 tools that AI agents like Claude Desktop can use directly. This allows your AI assistant to read, understand, and generate correct code for sending emails and managing your email operations through simple chat commands.

What is included in the free tier?

Ark offers a generous free tier to get started. New accounts receive $5 in free credits, which equates to 5,000 emails at the standard rate. There is no credit card required to begin, and you have access to all features, including unlimited domains, the full MCP server, and real-time analytics, during your trial.

How does Ark ensure high email deliverability?

Ark guarantees 99.9%+ deliverability by automatically configuring the critical authentication protocols (SPF, DKIM, DMARC) for your domain upon verification. This tells mailbox providers your emails are legitimate. Combined with dedicated IP management, reputation monitoring, and compliance with best practices, Ark ensures your emails reliably land in the inbox, not spam.

Pricing of Ark

Ark uses a simple, transparent pay-as-you-go pricing model. You are charged $0.50 for every 1,000 emails you send. There are no monthly fees, no tiers, and no overage charges. All features—including unlimited team members, unlimited domains, the full MCP server with 26 tools, AI-readable documentation, real-time analytics, and a 99.99% uptime SLA—are included at this single rate. New users start with $5 in free credits (5,000 emails).