Give your AI agent email capabilities without risking your domain
Autonomous AI agents need email to confirm bookings, follow up with leads, and notify teams. SadaSend provides per-key recipient allowlists, velocity throttles, and approval holds.
Drop into your application in under 60 seconds
Native typed interfaces with zero unnecessary dependencies. Built for standard fetch and modern edge runtimes.
from sadasend import SadaSend
client = SadaSend(api_key="sk_agent_...")
# Dispatches email with automatic velocity ceiling and allowlist checks
response = client.emails.send(
sender="agent@yourdomain.com",
recipient="lead@company.com",
subject="Scheduled Demo: Tomorrow at 2 PM",
text="Hi Alex, confirming our product walkthrough for tomorrow.",
agent_id="support-agent-v1",
)
print(f"Sent email ID: {response.id}")Native Python client with agent telemetry, velocity tripwires, and automatic recipient validation.
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.
Per-Key Recipient Allowlists
Confine agent dispatches to approved customer domains or team inboxes to prevent accidental rogue emails.
Velocity Circuit Breakers
Hard rate-limited thresholds halt agent dispatch loops immediately if a prompt injection or recursive task triggers.
10 Hosted MCP Tools
Connect Claude Desktop, Cursor, Cline, or LangChain to hosted Model Context Protocol tools without running local servers.
Human-in-the-Loop Approval Mode
Flag sensitive emails for operator review in /app/approvals before actual SMTP submission occurs.
Agent Identity Provenance
Tag every email with the responsible agent ID and model metadata for complete audit logging.
Instant Revocation API
Revoke compromised agent credentials in immediate across all global edge dispatch nodes.
SadaSend vs Generic Email APIs (Resend / SendGrid)
Standard email APIs offer zero safeguards for autonomous LLMs and agent loops.
| Feature & Capability | SadaSend | Generic Email APIs (Resend / SendGrid) |
|---|---|---|
| Per-Key Recipient Allowlists | ||
| Velocity Circuit Breakers | ||
| Human-in-the-Loop Hold Mode | ||
| Hosted Model Context Protocol (MCP) | ||
| Agent Metadata Provenance | ||
| Free Tier with Agent Tools | 6,000 sends/mo | No agent tools |
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 AI agent email
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.
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How to Safely Let Agents Send Email: Defense-in-Depth for Autonomous Outbound
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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.