Connect Windsurf Cascade to safe transactional email with scoped agent credentials
Give Windsurf Cascade autonomous coding agents email capabilities while safeguarding production. Recipient allowlists, per-hour velocity tripwires, and 10 hosted Model Context Protocol email tools.
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@latest"],
"env": {
"SADASEND_API_KEY": "sada_agent_live_xxxxxxxxxxxx",
"SADASEND_RECIPIENT_ALLOWLIST": "*@yourcompany.com"
}
}
}
}Windsurf Cascade MCP server configuration with domain allowlists for safe multi-step autonomous coding workflows.
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.
Cascade Multi-Step Agent Execution
Windsurf Cascade can autonomously generate templates, configure DNS verification scripts, and test dispatches in sequence.
Zero Leakage Allowlist Controls
Ensure Cascade never sends emails to external addresses during autonomous multi-file generation or refactoring tasks.
10 Granular Model Context Tools
Complete tool suite covering email dispatch, status checking, suppression removal, and domain verification polling.
Hourly Velocity Ceilings
Prevent Cascade from entering recursive sending loops during autonomous test script execution with strict hourly limits.
Detailed .windsurfrules Standards
Add domain context and email governance instructions into .windsurfrules to keep Cascade aligned with your email policies.
6,000 Free Monthly Sends
Permanent developer tier supporting full Windsurf MCP integration, custom domains, and webhook delivery logging.
SadaSend vs Unrestricted REST APIs in Windsurf
Why AI developers configure SadaSend MCP in Windsurf Cascade rather than exposing raw SMTP or REST secrets.
| Feature & Capability | SadaSend | Unrestricted REST APIs in Windsurf |
|---|---|---|
| Native Windsurf Cascade MCP Support | Requires building custom scripts | |
| Cascade Recipient Allowlists | Risk of emailing production users | |
| Velocity Tripwire Protection | No loop prevention | |
| In-Cascade Domain DNS Polling | Manual browser check required | |
| .windsurfrules Reference Docs | ||
| Free Tier with MCP Access | 6,000 sends forever | Paid subscriptions 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 Windsurf 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.
What actually happens when you give an AI agent your email API key
Every email MCP server on the market hands your agent the full platform. That is a capability claim with no control story — and it is the reason your engineering lead keeps saying no.
Preventing Infinite Email Loops in Autonomous AI Agents: Circuit Breakers and Token Buckets
When two autonomous email agents start talking to each other, they can trigger an infinite email loop in minutes. Here is how to engineer circuit breakers, token buckets, and idempotency safeguards.