---
title: "Send transactional emails via Resend — plain text or HTML"
method: POST
path: "/v1/tools/email-send"
tags: ["Communication"]
---

# Send transactional emails via Resend — plain text or HTML

`POST /v1/tools/email-send`

## Request

- Base URL: `https://archtools.dev`
- URL: `https://archtools.dev/v1/tools/email-send`
- Auth: API key in header `x-api-key`

## Request body

- object
  - `to` string, required: Recipient email address
  - `subject` string, required: Email subject line
  - `body` string, required: Plain text email body
  - `html` string: HTML email body (alternative to body)
  - `from` string: Sender (default: no-reply@archtools.dev)

## Response `200`

Message ID

---

[API](https://skmtc.dev/archtools/apis/arch-tools-api.md) · [All operations](https://skmtc.dev/archtools/apis/arch-tools-api/llms.txt) · [OpenAPI document](https://skmtc.dev/archtools/apis/arch-tools-api/revisions/ed6c1f974033?raw)