--- title: Transactional email from Workers with Resend | daily.dev description: A practical guide to sending transactional email from Cloudflare Workers using Resend's REST API directly via fetch, bypassing Node.js SDKs entirely. Covers a... canonical: https://daily.dev/posts/transactional-email-from-workers-with-resend-mdu3iqfui twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Transactional email from Workers with Resend | daily.dev og:description: A practical guide to sending transactional email from Cloudflare Workers using Resend's REST API directly via fetch, bypassing Node.js SDKs entirely. Covers a... og:url: https://daily.dev/posts/transactional-email-from-workers-with-resend-mdu3iqfui og:image: https://api.daily.dev/og/posts/mDu3iqfUi.png og:image:alt: Transactional email from Workers with Resend og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Transactional email from Workers with Resend **[Flavio Copes](https://daily.dev/sources/flaviocopes)** · 4 min read · 0 upvotes · 1 comments ## Summary A practical guide to sending transactional email from Cloudflare Workers using Resend's REST API directly via fetch, bypassing Node.js SDKs entirely. Covers a reusable send function with graceful no-op behavior when the API key is absent, an admin notification pattern for new events, and KV-based deduplication to prevent error alert floods. Also includes HTML escaping for inline email templates and Wrangler secrets setup. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Community discussion Top comments from developers on daily.dev. **@sahilatahar** · 1 upvotes > Interesting, what's your thought about emailJS? ## Similar posts on daily.dev - [How to send email with Cloudflare Email Service](https://daily.dev/posts/how-to-send-email-with-cloudflare-email-service-b58bo9wrj) · Flavio Copes · 0 upvotes · 0 comments - [Resend joins the Vercel Marketplace](https://daily.dev/posts/resend-joins-the-vercel-marketplace-t3hgvfr5j) · Vercel · 4 upvotes · 2 comments - [Cloudflare Introduces Email Service to Compete with Amazon SES, Resend, and SendGrid](https://daily.dev/posts/cloudflare-introduces-email-service-to-compete-with-amazon-ses-resend-and-sendgrid-wblo5ljea) · InfoQ · 74 upvotes · 9 comments - [Integrating Resend with Auth0 for Email Delivery](https://daily.dev/posts/integrating-resend-with-auth0-for-email-delivery-tiasi9k4c) · Auth0 · 0 upvotes · 0 comments --- Tags: [#javascript](https://daily.dev/tags/javascript), [#cloudflare](https://daily.dev/tags/cloudflare) [View this post on daily.dev](https://daily.dev/posts/transactional-email-from-workers-with-resend-mdu3iqfui) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Transactional email from Workers with Resend","url":"https://daily.dev/posts/transactional-email-from-workers-with-resend-mdu3iqfui","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/transactional-email-from-workers-with-resend-mdu3iqfui"},"datePublished":"2026-07-14T07:25:09.536Z","dateModified":"2026-07-14T07:25:27.650Z","description":"A practical guide to sending transactional email from Cloudflare Workers using Resend's REST API directly via fetch, bypassing Node.js SDKs entirely. 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