Give Claude Desktop safe transactional email access with native Model Context Protocol tools
Connect Claude Desktop, Claude Code CLI, and Anthropic API models directly to verified production email. Native hosted MCP server featuring 10 scoped tools, recipient allowlists, and zero prompt-injection risk.
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"
}
}
}
}Claude Desktop remote Model Context Protocol configuration connecting directly to hosted streamable HTTP/SSE with server-enforced recipient allowlists.
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 Native Hosted MCP Tools
Equip Claude with tools to send emails, inspect delivery logs, check suppression lists, verify domains, and validate recipient addresses.
Edge-Enforced Recipient Allowlists
Prevent Claude from hallucinating or being prompt-injected into emailing arbitrary third parties with domain wildcards.
Human-in-the-Loop Approval Holds
Configure high-stakes emails to pause in your dashboard queue for operator review before actual SMTP dispatch.
Hourly Velocity Circuit Breakers
Set hard dispatch ceilings (e.g., 25 emails/hour) so recursive model reasoning loops trip automated circuit breakers.
Tamper-Proof Audit Logging
Every email sent by Claude captures the model prompt metadata, tool arguments, and cryptographic timestamps.
6,000 Free Monthly Sends
Test and scale autonomous Claude workflows with custom domain DKIM/SPF signatures at zero initial cost.
SadaSend vs Unrestricted REST API Keys in Claude
Why AI engineers connect Claude through SadaSend MCP rather than giving raw master API credentials to the model.
| Feature & Capability | SadaSend | Unrestricted REST API Keys in Claude |
|---|---|---|
| Hosted Model Context Protocol (MCP) | Requires building custom local wrappers | |
| Prompt Injection Recipient Allowlists | None (Model can email anyone) | |
| Autonomous Loop Circuit Breakers | Drains quota until balance reaches $0 | |
| Operator Human Approval Hold | ||
| Tool Schema Type Validation | Frequent JSON argument parse errors | |
| Free Tier with MCP Tools | 6,000 sends forever | Paid plan 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 Claude 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.
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.
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.
The 2026 Stateless MCP Specification Explained: Scalable Serverless AI Tools
The July 2026 Model Context Protocol update solved MCP’s biggest scaling bottleneck: stateful connection stickiness. Here is how stateless streamable HTTP transports work.