Security & permissions governance for AI outbound mail at enterprise scale
Manage the blast radius of autonomous systems with scoped API credentials, cryptographically signed audit logs, recipient fencing, and automated compliance controls.
Drop into your application in under 60 seconds
Native typed interfaces with zero unnecessary dependencies. Built for standard fetch and modern edge runtimes.
import { SadaSend } from 'sadasend';
const sadasend = new SadaSend(process.env.MASTER_ADMIN_KEY);
// Provision scoped agent key with immutable governance constraints
const agentKey = await sadasend.keys.create({
name: 'billing-agent-eu',
scopes: ['emails:send'],
allowedRecipients: ['*@corporate.eu', '*@invoices.local'],
rateLimit: { maxPerMinute: 15, maxPerDay: 500 },
ipAllowlist: ['198.51.100.0/24'],
requireApproval: false,
});
console.log('Created scoped key ID:', agentKey.id);Programmatic key provisioning with scoped permissions, IP CIDR boundaries, and rate ceilings.
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.
Least-Privilege Scoped Keys
Issue granular API keys restricted strictly to sending, viewing logs, or reading templates without administrative access.
IP CIDR Network Fencing
Restrict API key usage to specific VPC subnets or agent server clusters, blocking stolen credential abuse.
Cryptographic Audit Logging
Every outbound transmission records client IP, authenticated key ID, agent model tags, and delivery timestamps.
Multi-Tenant Isolation
Partition email streams, suppression lists, and deliverability metrics across separate development environments.
Zero Data Training Policy
SadaSend strictly never trains machine learning models on customer email contents, recipient addresses, or metadata.
Automated Incident Revocation
Instant global token invalidation halts compromised agent keys in under 5 milliseconds across edge nodes.
SadaSend vs Legacy Enterprise Relays (SendGrid / Amazon SES)
Legacy email relays lack agent identity tracking, IP binding per key, and autonomous loop defense.
| Feature & Capability | SadaSend | Legacy Enterprise Relays (SendGrid / Amazon SES) |
|---|---|---|
| Per-Key IP CIDR Allowlisting | Account-wide only | |
| AI Model & Agent ID Telemetry | ||
| Per-Key Allowed Recipient Domains | ||
| Zero LLM Data Training Guarantee | Vague terms | |
| Real-Time Circuit Breaker Invalidation | Immediate — the next request is refused | Minutes or manual |
| Forever Free Developer Tier | 6,000 sends ($0) | Trial or credit card |
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 security
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.
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.
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.
Email Threat Modeling for SaaS: Preventing Compromised API Key Abuse
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How to Safely Let Agents Send Email: Defense-in-Depth for Autonomous Outbound
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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.
Prevent Staging Email Leaks: Recipient Allowlist Guide
A single test script or database seed in staging can accidentally blast thousands of fake password resets to real customers. Here is how to engineer zero-leak staging pipelines.