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Built for Software Engineers & AI BuildersTypeScript SDK · MCP Native

The email service built from the ground up for developers with zero marketing bloat

Integrate transactional email into your codebase in under 60 seconds. Typed TypeScript and Python SDKs, drop-in Port 587 ESMTP relay, 10 Model Context Protocol tools, and 6,000 free monthly sends.

3,000 emails/month freeZero credit card requiredSub-20ms edge latency
< 60 seconds
Integration Time
3 lines of code
TS, Py, Go
SDK Support
First-class packages
6,000
Free Monthly Tier
Custom domain DKIM
Developer Ergonomics

Drop into your application in under 60 seconds

Native typed interfaces with zero unnecessary dependencies. Built for standard fetch and modern edge runtimes.

$npm install sadasend
developer-quickstart.ts
typescript
TYPESCRIPT
import { SadaSend } from 'sadasend';

const sadasend = new SadaSend(process.env.SADASEND_API_KEY!);

// Send transactional email with full TypeScript autocompletion
const { id, status } = await sadasend.emails.send({
  from: 'Developers <dev@yourdomain.com>',
  to: 'user@example.com',
  subject: 'Your API Key has been provisioned',
  html: '<h1>API Key Ready</h1><p>Your access token is active.</p>',
  tags: ['api-key-provision']
});

console.log(`Message ${id} status: ${status}`);

Type-safe email dispatch using our official TypeScript SDK with automatic parameter validation and autocomplete.

Core Infrastructure

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.

First-Class TypeScript & Python SDKs

Fully typed client libraries with complete autocomplete, runtime parameter checks, and zero heavyweight runtime dependencies.

Native Model Context Protocol (MCP)

Connect Claude, Cursor, Windsurf, and custom AI agents directly to production email with 10 hosted tools and guardrails.

Developer Sandbox Testing Mode

Test entire email pipelines in CI/CD and local development without consuming monthly quota or emailing real users.

Synchronous REST & Port 587 ESMTP

Use modern HTTP/2 REST APIs or drop smtp.sadasend.com into existing applications with universal apikey authentication.

Real-Time Webhook Event Stream

Inspect raw delivery logs, test webhooks with synthetic event triggers, and verify cryptographic HMAC payloads.

6,000 Free Monthly Sends

Generous permanent developer allowance with custom domain DKIM, webhook logs, and API access included.

Architectural Comparison

SadaSend vs Bloated Marketing Automation Suites

Why developers prefer SadaSend clean engineering-first platform over complicated enterprise marketing clouds.

Feature & CapabilitySadaSendBloated Marketing Automation Suites
Developer-First API & SDK DesignCluttered with non-developer marketing tools
Hosted AI Agent MCP Server
CI/CD Sandbox Testing ModeRequires paying for sandbox add-ons
Clean Synchronous Error MessagesVague error codes & silent failures
React Email Template SupportLocked into proprietary drag-and-drop builders
Permanent Free Developer Tier6,000 sends foreverTrial expiration or 100/day limit
Forever Free Tier
Transparent Economics

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.

3,000 dispatches monthly forever with zero credit card
All safety gates, allowlists, and velocity limits included
Scale seamlessly: Starter ($12/mo for 10k), Pro ($19/mo for 50k), Scale ($79/mo for 250k)
Free Developer Plan
$0 / mo

No credit card required

Create Free AccountCompare all paid plan tiers
Frequently Asked Questions

Everything you need to know about email service for developers

Clear, transparent answers on deliverability, API authentication, and rate limits.

We provide official, maintained SDKs for TypeScript/JavaScript (sadasend) and Python (sadasend), alongside standard cURL, Go, and PHP code examples.
Technical Deep Dives

Related developer guides and architectural tutorials

Explore step-by-step production implementation blueprints, benchmarks, and protocols.

Documentation

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.

Read guide
Documentation

REST API Reference & Endpoints

Complete REST API reference for sending emails, managing API keys, tracking delivery events, and configuring recipient allowlists with low latency.

Read guide
Documentation

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.

Read guide
Deep Dive3 min read

How to Send Transactional Email with Bun and TypeScript (Zero Dependencies)

Stop wrestling with bloated Node.js polyfills. Learn how to send transactional emails in Bun with sub-millisecond cold starts and full TypeScript type safety.

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Nodemailer vs Native Fetch in 2026: Why Modern Runtimes Abandoned Legacy SMTP

Nodemailer served the Node.js ecosystem for 15 years. Here is why modern serverless and edge runtimes have replaced raw SMTP libraries with native fetch.

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React Email Component Library Guide: Responsive Bulletproof Templates

Stop wrestling with nested HTML tables from 1999. Learn how to build modern, responsive transactional email components in React that render flawlessly in Outlook, Gmail, and Apple Mail.

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How to Give an AI Agent Email Access Without Handing Over Your Whole Account

Step-by-step tutorial on minting a scoped agent key, setting up domain allowlists, and integrating email tools into LangChain, CrewAI, and TypeScript loops safely.

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