Equip Cursor with secure email dispatch and testing directly inside your IDE agent
Test transactional templates, inspect domain DKIM records, and dispatch sandbox emails without switching windows. Model Context Protocol integration built for Composer and Cursor agent.
Drop into your application in under 60 seconds
Native typed interfaces with zero unnecessary dependencies. Built for standard fetch and modern edge runtimes.
{
"mcpServers": {
"sadasend": {
"url": "https://mcp.sadasend.com",
"headers": {
"Authorization": "Bearer sada_agent_live_xxxxxxxxxxxx"
}
}
}
}Cursor MCP configuration connecting directly to hosted streamable HTTP/SSE for zero-risk local email development and automated testing.
Engineered for high deliverability and zero incident risk
Every layer from edge connection pooling to per-key rate limits is designed to keep critical transactional dispatches fast, reliable, and contained.
Native Cursor Composer & Agent Tools
Ask Cursor to "send a test invoice to test@mycompany.com" and watch it execute verified transactional email dispatches.
In-IDE Delivery Log Inspection
Cursor can inspect delivery status, bounce logs, and spam reports directly in your terminal without opening a browser dashboard.
Automated .cursorrules Context
Provide strict operational rules in .cursorrules telling Cursor which sender domains and email templates are authorized.
Sandbox Simulation Mode
Run full transactional email integration tests during coding sessions without burning monthly quota or emailing real users.
React Email Template Preview
Pair with @react-email/components to render and preview JSX emails within your IDE before committing changes.
6,000 Free Monthly Emails
Permanent developer tier supporting full MCP server tool execution, domain authentication, and webhook monitoring.
SadaSend vs Manual Browser Testing & Mock SMTP
Why developers working in Cursor use SadaSend MCP rather than alt-tabbing to web dashboards or MailHog.
| Feature & Capability | SadaSend | Manual Browser Testing & Mock SMTP |
|---|---|---|
| Integrated MCP Tool Calling in IDE | Manual browser tab switching required | |
| Real-Time Delivery Log Querying | Cursor inspects logs via tool | Manual dashboard grepping |
| Sandbox Zero-Quota Testing | Consumes real sending balance | |
| Recipient Allowlists for Agent Safety | ||
| .cursorrules Reference Templates | ||
| Free Tier with Custom Domain | 6,000 sends forever | Trial or credit card required |
Start with 3,000 emails every month at zero cost
No artificial paywalls on security. Unlike legacy providers that reserve recipient allowlists or dedicated IP pools for high enterprise tiers, every SadaSend account receives full safety controls from day one.
Everything you need to know about Cursor email API
Clear, transparent answers on deliverability, API authentication, and rate limits.
Related developer guides and architectural tutorials
Explore step-by-step production implementation blueprints, benchmarks, and protocols.
Model Context Protocol (MCP) Server
Connect AI agents directly to SadaSend via Model Context Protocol (MCP). Inspect tools, configure execution scopes, and enable human approval holds.
AI coding agent rules (AGENTS.md, Cursor, Claude)
Setup instructions and rule files for AI coding agents: AGENTS.md, .cursorrules, CLAUDE.md, and hosted MCP configuration.
REST API Reference & Endpoints
Complete REST API reference for sending emails, managing API keys, tracking delivery events, and configuring recipient allowlists with low latency.
Cursor and Windsurf Rules for AI Email Agent Development (.cursorrules Guide)
Supercharge your AI-assisted development workflow with battle-tested Cursor and Windsurf rules tailored for transactional email and MCP integrations.
Claude Desktop MCP Email Integration: Giving Claude Autonomous Email Capabilities
Learn how to configure Claude Desktop with SadaSend’s Model Context Protocol (MCP) server on macOS and Windows, with strict per-key containment boundaries.
Building a Custom TypeScript MCP Server for Email: Zero to Production in 100 Lines
Learn how to create a high-performance, type-safe TypeScript MCP server that exposes email sending, domain DNS verification, and delivery log inspection to Claude and Cursor.
How to Safely Let Agents Send Email: Defense-in-Depth for Autonomous Outbound
An engineering guide to defense-in-depth for autonomous email: preventing indirect prompt injection, infinite retry loops, and unverified recipient spam.