AISend

npx add-mcp 'https://api.aisend.app/mcp'

Transactional email your AI agent operates and you supervise

Tag the work in ChatGPT, Claude, Cursor or Gemini. The agent sends password resets, receipts and notifications from your verified domain over MCP or a Resend-compatible API and checks delivery; you approve the connection, review what was sent and can revoke access. Try it first: sign up and send 10 test emails to your own inbox, no card. Sending to your recipients needs a paid plan from $14/mo.

No card needed: every account gets 10 test emails to its own verified address. Sending to your recipients needs a paid plan (Pro: $14/mo, 50,000 emails).

AISend at a glance

What it is

AISend is a transactional email API built for AI agents to operate and humans to supervise: an agent sends from your verified domain, checks delivery and validates addresses over MCP or a Resend-compatible API, while you approve, review and can revoke access.

Primary user

An AI agent (ChatGPT, Claude, Cursor, Gemini CLI or any MCP client) operates it: sends email, checks delivery, validates addresses. A human tags the work, approves the connection, reviews what the agent did and can revoke access.

Who pays for it

Product and engineering teams at SaaS companies and agencies that send password resets, receipts and notifications from their own domains, and individuals or small businesses who want an assistant to send and track email from a domain they own.

What it does not do

Cold outreach, purchased lists, bulk marketing or newsletters. No campaigns or automations. Free allowance: 10 test emails in total (up to 5 a day) to your own verified account address, from onboarding@send.aisend.app, no card. Sending to anyone else, or from your own domain, needs a paid plan and a domain you have verified.

Price

From $14/month (Pro, 50,000 emails/month), billed monthly per account. Business $63/month for 100,000 emails/month; Scale $149/month for 500,000 emails/month (daily cap 5,000, about 150,000 a month today). No per-email overage charges. No card for the free allowance of 10 test emails to your own address.

Integrations

MCP (hosted https://api.aisend.app/mcp and local npx aisend-mcp), Resend-compatible REST API, Node.js SDK (aisend-email), HMAC-SHA256 signed webhooks, delivery through AWS SES.

Security and data

Sends through AWS SES. Data encrypted in transit (TLS); API keys stored hashed. OAuth 2.1 with PKCE for assistants; the key an OAuth sign-in creates works only on the MCP endpoint, expires after 90 days, is limited to 100 emails a day and can be revoked on the API Keys page.

Start in minutes

Create an account (free), connect an assistant at https://aisend.app/mcp (about a minute) or create an API key, and send yourself a free test email. To send to your recipients, add a domain you own and publish its DNS records (propagation time varies), then subscribe to a plan.

MCP

https://api.aisend.app/mcp (Streamable HTTP, OAuth or API key). Official MCP Registry name: app.aisend/aisend.

We built AISend to send our own products' email. Welcome messages, password resets, and receipts across our own apps run through this exact API in production every day. We're new, so there's no wall of customer logos here yet — just the same API we rely on ourselves, and an honest recommendation to dual-send and verify before you cut over.

Just 4 Lines of Code

Sign up, verify your domain with one DNS step, send. You can add and verify a domain before subscribing; sending to your recipients needs a paid plan.

Node.js SDK

import { AISend } from 'aisend-email';

const aisend = new AISend('re_your_api_key');

// Free, no card: works on your first call with no domain setup. A free account
// can send 10 test emails, and only to its own verified address.
await aisend.emails.send({
  from: 'onboarding@send.aisend.app',
  to: 'you@youraccount.com', // your account email on the shared address
  subject: 'Welcome to AISend',
  html: '<p>Your first email!</p>'
});

// To send to your recipients from your own verified domain, subscribe to a paid plan.

cURL

curl -X POST https://api.aisend.app/api/v1/emails \
  -H "Authorization: Bearer re_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "from": "onboarding@send.aisend.app",
    "to": "you@youraccount.com",
    "subject": "Welcome to AISend",
    "html": "<p>Your first email!</p>"
  }'

Production Email, Not Just Fast Email

Every feature is designed around getting a transactional email system live and observable.

Deliverability Controls

Verified domains, SPF, DKIM, DMARC guidance, bounce handling, and suppression lists built in.

Production Templates

Start from clean transactional templates for onboarding, billing, receipts, alerts, and auth flows.

Delivery Analytics

Track sent, failed, opened, clicked, bounced, and complained events from the dashboard.

Developer-First API

Clean REST API with SDK and cURL examples. Ship email in minutes.

Custom Domains

One-click domain setup with automated SPF, DKIM, and DMARC verification.

Webhooks & Events

Real-time delivery events — sent, delivered, opened, clicked, bounced — via webhooks.

Automatic Suppression

Bounces and complaints are suppressed automatically, so you protect your sender reputation without writing any logic.

Resend-Compatible

Speaks the same request format as Resend. Migrate by changing one base URL and swapping your key.

Built for AI Agents

One API call to sign up. Claude, GPT, and any AI agent can send emails programmatically.

Built for Developers Who Need Reliable Email

A focused API for product emails: auth, onboarding, billing, alerts, and lifecycle messages.

Free

10 test emails to your own address, no card; paid plans from $14/mo

$14

Pro: 50k emails/mo (Resend $20)

MCP

Native email tool for Claude & Cursor

1 line

To migrate from Resend

Resend-compatible API

Same request format as Resend. Migrate by changing one base URL and swapping your key — no code rewrite.

Built-in MCP server

Drop AISend into Claude, Cursor, or any MCP client so your AI agents can send email as a native tool.

Honest, flat pricing

Free: 10 test emails to your own address. Paid: Pro is 50,000 emails for $14/mo — about 30% cheaper than Resend.

Try the API

See how simple it is to send an email with AISend. One POST request, one JSON body.

POST/api/v1/emails

Request

curl -X POST https://api.aisend.app/api/v1/emails \
  -H "Authorization: Bearer re_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "from": "onboarding@send.aisend.app",
    "to": "you@youraccount.com",
    "subject": "Welcome!",
    "html": "<p>Your first email!</p>"
  }'

Response

HTTP/1.1 201 Created

{
  "id": "em_8f3k2j1m"
}

Click "Try it" to see the response

Create an account to get your API key →

Email as a tool for AI agents

AISend ships an MCP server, so Claude, Cursor, and any MCP-compatible assistant can send email, check delivery, and validate addresses — no glue code required.

Install the AISend MCP connector for ChatGPT, Claude, Cursor and Gemini

AISend vs Resend

Feature	AISend	Resend
Custom Domains	Paid plans: 10 on Pro	3 free, 10 on Pro
Migration	Resend-compatible API	Native API
Webhooks	Yes	Yes
Free sending	10 test emails to your own address, no card	3,000 emails/month, 100/day
Entry paid plan	$14/mo for 50,000 emails	$20/mo for 50,000 emails
Resend-Compatible API	Yes	—

Resend figures checked November 13, 2026 on resend.com/pricing. Providers change plans; recheck before you buy.

Built on AWS SES

DKIM, SPF & DMARC

Automatic bounce suppression

Resend-compatible API

Start Sending Product Emails Today

Send 10 test emails free, no card. Subscribe to a plan (Pro is $14/mo) to send to your recipients.

Frequently Asked Questions

What is AISend?

AISend is a transactional email API for developers and AI agents. It provides a REST API, SDKs, and an MCP server for sending transactional emails like password resets, receipts, and verification codes. It is built on AWS SES and handles bounce and complaint suppression automatically.

How is AISend different from Resend or SendGrid?

AISend uses the same request format as Resend, so migrating is a one-line base-URL change. It is about 30% cheaper at the Pro tier (50,000 emails for $14/mo vs Resend's $20), and it ships an MCP server so AI agents can send email as a native tool.

Is there free sending?

Only a small test allowance. Every account can send 10 test emails to its own verified address from onboarding@send.aisend.app, with no card. Sending to other recipients, or from your own domain, needs a paid plan: Pro is $14/mo for 50,000 emails.

Can I migrate from Resend to AISend?

Yes. AISend speaks the same request format as Resend. Point your client at api.aisend.app (or use the /emails alias with no /api/v1 prefix) and swap your API key — no code rewrite needed.

What email provider does AISend use?

AISend sends through AWS SES. Bounces and complaints are processed via SES notifications and suppressed automatically to protect your sender reputation.

Is AISend secure?

Data is encrypted in transit (TLS). Custom domains are authenticated with DKIM, SPF, and DMARC. API keys are hashed and never stored in plain text.