Hosted Model Context Protocol (MCP) email server for AI assistants & agents
Plug production email into Claude Desktop, Cursor, Cline, Windsurf, or custom LangChain agents. Hosted SSE endpoint with 10 scoped tools and zero server maintenance.
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": {
"command": "npx",
"args": ["-y", "@sadasend/mcp-server"],
"env": {
"SADASEND_API_KEY": "sk_agent_your_key_here"
}
}
}
}Add to Claude Desktop or Cursor to instantly equip your AI coding assistant with 10 email capabilities.
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.
10 Hosted MCP Tools
Tools for sending emails, checking deliverability, inspecting logs, managing suppressions, and validating templates.
Zero-Maintenance SSE Endpoint
Connect directly via Server-Sent Events at https://mcp.sadasend.com without running local Docker containers.
Per-Tool Permission Scopes
Restrict Claude or Cursor to read-only log tools or limit send tools to approved recipient domains.
Real-Time Execution Feedback
Detailed JSON responses let agents confirm delivery statuses and handle errors gracefully.
Universal Client Compatibility
First-class support for Claude Desktop, Cursor IDE, Windsurf, Cline, and OpenAI Swarm.
Free Developer Tier
6,000 free emails monthly and unlimited MCP tool calls on the Developer Free plan.
SadaSend vs Self-Hosted Stdio Servers / Postmark MCP
Compare SadaSend's hosted 10-tool MCP server — reachable over HTTP with no local install and no process to run — against self-hosted stdio servers.
| Feature & Capability | SadaSend | Self-Hosted Stdio Servers / Postmark MCP |
|---|---|---|
| Hosted Cloud SSE Stream | Local stdio only | |
| Available Scoped MCP Tools | 10 Native Tools | 4 Basic Tools |
| Per-Key Recipient Allowlists | ||
| Automated Staging Quarantine | ||
| Velocity Tripwires on Tool Calls | ||
| Monthly Free Tier | 6,000 emails ($0) | 100 sends only |
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 MCP email server
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.
Official Client SDKs (TypeScript & Python)
Official zero-dependency client SDKs for SadaSend. TypeScript and Python packages are live on npm and PyPI with typed results and auto-idempotency.
REST API Reference & Endpoints
Complete REST API reference for sending emails, managing API keys, tracking delivery events, and configuring recipient allowlists with low latency.
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.
Model Context Protocol (MCP) Email Tutorial: Connecting Claude and Agents to SadaSend
Learn how to connect Claude Desktop and MCP-compatible agents directly to SadaSend without writing boilerplate REST API wrappers.
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.
The Complete Directory of Email MCP Tools and Schemas (2026 Reference Guide)
Looking for standard MCP schemas for email tools? Here is the complete production directory of tool definitions, input arguments, return types, and error codes.
MCP vs REST APIs for AI Agents: Why Traditional API Keys Fail in Agentic Workflows
Giving an autonomous agent a static REST API key is like handing an intern your corporate credit card with no transaction limit. Here is why the Model Context Protocol (MCP) replaces REST.