Astro newsletter form
Add a newsletter signup to your Astro site with zero JavaScript and no backend. One email field in a .astro component that posts to Formpaste, so subscribers land in your inbox or your email tool. No island required.
How to build it
- Create a form in your Formpaste dashboard and copy its access key.
- Copy the markup above into a .astro component or layout.
- Replace YOUR_ACCESS_KEY_HERE with your access key, then build and deploy.
Prompt for your AI coding agent
Give me a plain HTML newsletter signup form with a single email field for an Astro component that POSTs to https://api.formpaste.com/submit with a hidden access_key input. No island, no client script.Or connect the Formpaste MCP server to Claude Code, Codex, Cursor, Claude Desktop, VS Code, or any mcp-remote client. See the setup guide.
Astro gotchas
An Astro contact form is a plain form in a .astro component that posts to Formpaste. It ships zero JavaScript and works on a fully static build. You only reach for an island if you want an inline success message instead of a redirect.
Zero JavaScript by default
A form with action set to the Formpaste endpoint and method POST submits with a full-page post - no island, no client script. This is the whole point of Astro: the page stays static and fast.
No SSR required
Because the form posts to an external endpoint, you do not need Astro's SSR or an adapter. output stays static and the form works the same on any static host.
Islands only if you want inline JS
If you prefer to stay on the page and show your own success state, move the form into a framework island (client:load) and use the React or Vue onSubmit from the toggle. For a redirect-to-thank-you flow, no island is needed.
The hidden access_key wires it up
Keep the hidden access_key input exactly as generated. It tells Formpaste which form the submission belongs to.
What to get right
One field converts best
A newsletter form should ask for email only. Every extra field lowers signups.
Confirm before you celebrate
Show a subscribed message on success. If you need double opt-in, send the confirmation from your email tool, not the form.
Push to your email tool
Forward submissions to your ESP with a webhook so new subscribers land where you send campaigns.
How it works
Three simple steps for form submissions to land in your email inbox.
Create your form, set your form's action URL to Formpaste's endpoint, and add your access key.
Create your form
Sign up, verify your email, and create an access key in your dashboard.
Copy the code
Paste the snippet above into your project. Pick CSS or Tailwind to match your site.
<form action="https://api.formpaste.com/submit" method="POST" class="mx-auto flex w-full max-w-md flex-col gap-4 rounded-xl border border-gray-200 bg-white p-6 shadow-sm dark:border-gray-800 dark:bg-gray-950">
<input type="hidden" name="access_key" value="YOUR_ACCESS_KEY_HERE">
<label class="flex flex-col gap-1.5 text-sm font-medium text-gray-900 dark:text-gray-100">Email
<input type="email" name="email" placeholder="you@example.com" required class="rounded-md border border-gray-300 bg-white px-3 py-2 text-sm text-gray-900 shadow-sm outline-none focus-visible:ring-2 focus-visible:ring-gray-900 dark:border-gray-700 dark:bg-gray-900 dark:text-gray-100 dark:focus-visible:ring-gray-100" />
</label>
<button type="submit" class="w-full rounded-md bg-gray-900 px-4 py-2 text-sm font-medium text-white shadow-sm transition-colors hover:bg-gray-800 disabled:opacity-60 dark:bg-white dark:text-gray-900 dark:hover:bg-gray-200">Subscribe</button>
</form>Add your access key
Replace the placeholder with your access key to start receiving submissions.
<input type="hidden" name="access_key" value="YOUR_ACCESS_KEY_HERE">Astro newsletter form FAQ
Paste a form. Get submissions.
Instantly without setting up any backend, servers or databases. 250 submissions/mo free - no credit card.