EVENT RSVP · ASTRO

Event RSVP for Astro

Attendance confirmation with headcount and dietary needs. Free for 500 submissions per month — no backend, no SDK, no plugin.

Get free access key Copy the code

500/mo free·no card·drop-in for Astro

form.htmlhtml25 lines

01<form action="https://splitforms.com/api/submit" method="POST">
02  <input type="hidden" name="access_key" value="YOUR_ACCESS_KEY">
03  <input type="hidden" name="subject" value="New event RSVP">
04 
05  <label for="name">Your name *</label>
06  <input id="name" type="text" name="name" placeholder="Jane Builder" required>
07  <label for="email">Email *</label>
08  <input id="email" type="email" name="email" placeholder="jane@example.com" required>
09  <label for="attending">Will you attend? *</label>
10  <select id="attending" name="attending" required>
11    <option value="">Choose…</option>
12    <option>Yes — count me in</option>
13    <option>Maybe</option>
14    <option>No, I can't make it</option>
15  </select>
16  <label for="guests">How many guests are you bringing?</label>
17  <input id="guests" type="number" name="guests" placeholder="0">
18  <label for="dietary">Dietary preferences</label>
19  <input id="dietary" type="text" name="dietary" placeholder="Vegan, gluten-free, allergies…">
20 
21  <!-- honeypot — bots fill every field -->
22  <input type="checkbox" name="botcheck" style="display:none" tabindex="-1" autocomplete="off">
23 
24  <button type="submit">Send</button>
25</form>

500

submissions / mo, free

fields, ready to ship

code outputs

60s

from copy to inbox

§ 00Astro + Event RSVPplatform-specific integration guide

Why Astro developers choose splitforms for event rsvp

Astro's static-first architecture means your form HTML ships pre-rendered with zero client JavaScript — perfect for fast page loads, but it also means you can't call a server-side endpoint on static hosts. splitforms is designed for exactly this: the browser POSTs directly to our edge endpoint, so the form works on Netlify, Cloudflare Pages, Vercel, or any static host without an Astro API route. The event rsvp is pure HTML — no <code><script></code> tag, no client component, no island. Astro's view transitions and partial hydration don't interfere with the form submission because it uses a standard browser POST.

§ 00Quick answerHTML · events

Yes — this is the shortest safe path for Astro.

Use the HTML snippet on this page, keep the event rsvp fields visible in your Astro UI, and let splitforms handle delivery, spam filtering, storage, and webhooks.

best implementation

Paste the HTML version, then replace YOUR_ACCESS_KEY.

The posted payload contains your name, email, will you attend?, how many guests are you bringing?, dietary preferences. Required fields are your name, email and will you attend?.

native astro reality

Astro's whole pitch is shipping zero JavaScript by default.

use case fit

Eventbrite charges 3.7% + $1.79 per ticket. For a free event, fundraiser, or private gathering, the RSVP form does the same job for $0 — and lives on your own domain.

§ 01Event RSVP × Astrowhy this combination, in 80 words

Built for Astro developers who hate operating a backend.

Splitforms is the form backend for Astro sites. One POST endpoint, no SDK, no plugin — drop the event rsvp into a page and ship.

Splitforms is the form backend for Astro sites. One POST endpoint, spam filtering, and a real dashboard — drop-in, no server, no PHP. Free for 500 dashboard submissions per month; Starter adds email, signed webhooks, exports, and retained uploads; Pro is $5/mo for 5,000.

✦ what you get on the free plan

✓500 form submissions per month
✓2 forms on Free; unlimited forms on Pro
✓Spam protection (honeypot + classifier)
✓Webhooks: Slack, Discord, WhatsApp, custom
✓CSV export of all submissions
✓Email notifications (CC and BCC on Pro)

§ 02Copy-paste codeHTML · 25 lines

Drop into any Astro project.

Replace YOUR_ACCESS_KEY with your splitforms key, paste into a Astro page, and ship. No build-time integration required.

form.htmlhtml25 lines

01<form action="https://splitforms.com/api/submit" method="POST">
02  <input type="hidden" name="access_key" value="YOUR_ACCESS_KEY">
03  <input type="hidden" name="subject" value="New event RSVP">
04 
05  <label for="name">Your name *</label>
06  <input id="name" type="text" name="name" placeholder="Jane Builder" required>
07  <label for="email">Email *</label>
08  <input id="email" type="email" name="email" placeholder="jane@example.com" required>
09  <label for="attending">Will you attend? *</label>
10  <select id="attending" name="attending" required>
11    <option value="">Choose…</option>
12    <option>Yes — count me in</option>
13    <option>Maybe</option>
14    <option>No, I can't make it</option>
15  </select>
16  <label for="guests">How many guests are you bringing?</label>
17  <input id="guests" type="number" name="guests" placeholder="0">
18  <label for="dietary">Dietary preferences</label>
19  <input id="dietary" type="text" name="dietary" placeholder="Vegan, gluten-free, allergies…">
20 
21  <!-- honeypot — bots fill every field -->
22  <input type="checkbox" name="botcheck" style="display:none" tabindex="-1" autocomplete="off">
23 
24  <button type="submit">Send</button>
25</form>

§ 03Setup3 steps · 60 seconds · zero config

Generate, embed, receive.

Three actions stand between you and your first event rsvp submission. None of them require a backend, a database, or a CAPTCHA library.

STEP 01GENERATE

Generate a free splitforms key

Create your form

key=sk_live_••••••••

STEP 02EMBED

Paste the event rsvp into your Astro project

Drop the form snippet into a Astro page, component, or layout. Replace YOUR_ACCESS_KEY with the key from your dashboard. The form action is a hard-coded URL — no env vars or build-time wiring needed.

snippethtml

<form action="https://splitforms.com/api/submit" method="POST">
  …
</form>

STEP 03RECEIVE

Receive submissions

Dashboard updates live on Free. Starter adds email delivery, signed webhooks, CSV export, Slack/Discord forwarding, and BCC to your team.

inbox · 1 newjust now

FROM contact@yoursite.com

New event RSVP

Maya Iyer maya@studio71.co

Loved the demo — quick question about pricing on the 3-year plan. Are usage limits per project or account-wide?

§ 03bEvent RSVP Form (Public / Private Events)template-specific playbook

The reason this event rsvp exists.

Webhooks into Notion / Airtable / Google Sheets · auto .ics calendar invite.

why it matters

Eventbrite, Splash, and Hopin take 3-7% of every paid ticket and charge subscription fees for the white-label option. For free events (fundraisers, private parties, conferences with sponsor-only revenue, weddings), the platform fees are pure waste. The RSVP form captures attending yes/no, guest count, plus-one names, dietary restrictions, and any custom fields (workshop preference for conferences, song requests for weddings). Webhook to a Notion / Airtable / Google Sheet for the running headcount, plus an automatic confirmation email. Final headcount goes to catering 5-7 days out, same as any platform would deliver.

route the submission

Capture attendance and party

Required: attending yes/no, guest count, plus-one names if applicable. Optional: dietary restrictions, song requests, workshop preference, accessibility needs.

Update the running list

Webhook to a Notion / Airtable / Google Sheet that the host references. Each RSVP appends a row; conditional formatting highlights special diets. Real-time headcount without spreadsheet work.

Confirm via email

Auto-respond with confirmation, event details, and a calendar invite (.ics file). Most guests forget the date once they've RSVP'd — calendar adds reduce no-shows by 30-40%.

§ 03cAstro production notesnative path · deploy · gotchas

What changes when this event rsvp lives in Astro.

These notes come from the Astro platform registry and are rendered on this template page so crawlers see the framework-specific answer without opening a separate guide.

without splitforms

Astro's whole pitch is shipping zero JavaScript by default. A native contact form on Astro means either (a) building a form with no submission target — useless — or (b) standing up an API endpoint via output: 'server' or 'hybrid', which means writing a Node/Bun/Deno handler, picking an email provider, writing your own honeypot logic. Astro 5 added typed Actions, but they're a wrapper around the same underlying fetch — you still deliver the email yourself. The result: every Astro contact-form tutorial ends with 'now configure SendGrid'. Splitforms is the SendGrid-replacement that doesn't require an account, an API key for the email provider, or DNS records for SPF/DKIM.

deploy notes

Astro deploys cleanly to Vercel, Netlify, Cloudflare Pages, GitHub Pages, and any static host with output: 'static'. For Astro Actions (Pattern B), you need output: 'server' or 'hybrid' and a matching adapter (@astrojs/vercel, @astrojs/netlify, @astrojs/cloudflare). On Cloudflare Pages with the Cloudflare adapter, the Action runs in a Worker — keep the splitforms fetch tight (no extra proxying) to stay under the 10ms CPU budget on the free plan. The PUBLIC_ prefix is mandatory for env vars exposed to client-rendered .astro files; vars without it are silently undefined. Lock the key to your *.pages.dev and custom domain.

Astro gotcha

PUBLIC_ prefix is required for client-exposed env vars

Astro mirrors Vite's env-var convention: only variables prefixed with PUBLIC_ are exposed to client-side code (and to .astro files when output: 'static'). If you write import.meta.env.SPLITFORMS_KEY, you'll get undefined at build time. Rename to PUBLIC_SPLITFORMS_KEY.

Astro gotcha

client:load on the form island defeats the point of Astro

If you wrap the form in <MyForm client:load />, you ship a full React/Preact runtime just for one form. Use client:visible (load when scrolled into view) or client:idle (load after main thread is free) instead. For zero-JS forms, skip the island entirely and use a plain HTML form action.

Astro gotcha

Astro Actions need a try/catch or they crash the page

If your action throws, Astro 5's behavior is to render an error page rather than return the error to your form. Wrap the splitforms fetch in try/catch and return { success: false, message } from the action — your form component can then render the message.

Astro gotcha

View Transitions can break form re-submit state

If you've enabled <ViewTransitions /> in your layout, navigating to /contact and back may re-mount the form mid-submission. Add data-astro-reload to the form's submit anchor or guard with if (status === 'loading') return at the top of your handler.

PATTERN A

Pattern A — pure HTML form (zero JS shipped)

The Astro-native approach: a .astro file with frontmatter pulling the key from import.meta.env, then a static <form action> that posts directly. Zero hydration, zero island, zero KB JavaScript. Use the same wiring for the event rsvp fields on this page.

pattern-a.txtastro10 lines

01---
02const ACCESS_KEY = import.meta.env.PUBLIC_SPLITFORMS_KEY;
03---
04<form action="https://splitforms.com/api/submit" method="POST">
05  <input type="hidden" name="access_key" value={ACCESS_KEY} />
06  <input type="hidden" name="redirect"   value="/thanks" />
07  <input name="email" type="email" required />
08  <textarea name="message" required />
09  <button type="submit">Send</button>
10</form>

PATTERN B

Pattern B — Astro Action for typed server-side proxying

Astro 5 Actions give you Zod-validated, type-safe form handlers. Use one to keep the access key off the client entirely — the form posts to the action, the action proxies to splitforms. Use the same wiring for the event rsvp fields on this page.

pattern-b.txtastro17 lines

01// src/actions/index.ts
02import { defineAction } from "astro:actions";
03import { z } from "astro:schema";
04export const server = {
05  contact: defineAction({
06    accept: "form",
07    input: z.object({ email: z.string().email(), message: z.string() }),
08    async handler(input) {
09      const fd = new FormData();
10      Object.entries(input).forEach(([k, v]) => fd.append(k, v));
11      fd.append("access_key", import.meta.env.SPLITFORMS_KEY);
12      const r = await fetch("https://splitforms.com/api/submit", { method: "POST", body: fd });
13      if (!(await r.json()).success) throw new Error("Submission failed");
14      return { ok: true };
15    },
16  }),
17};

§ 04Field-by-field rundown5 fields · names you POST

What every field actually does.

Each field below ships in the event rsvp template — rename, remove, or add your own. Splitforms accepts any name you POST.

nameREQUIRED

TEXT

Your name

Greeting + dashboard label so submissions don't all read 'anonymous'.

placeholder · Jane Builder

emailREQUIRED

Email

Reply-to address — splitforms wires this so hitting reply goes back to the sender.

placeholder · jane@example.com

attendingREQUIRED

SELECT

Will you attend?

Dropdown — keeps responses normalised so you can filter the dashboard.

Yes — count me inMaybeNo, I can't make it

guests

NUMBER

How many guests are you bringing?

Standard input — splitforms accepts whatever you POST under this name.

placeholder · 0

dietary

TEXT

Dietary preferences

Logistics input you'd otherwise gather over email anyway.

placeholder · Vegan, gluten-free, allergies…

§ 05Event RSVP on other frameworks21 frameworks · same backend

One backend. Every framework.

The same event rsvp template works on every framework splitforms supports. Pick yours.

§ 06Questions9 answered

Event RSVP on Astro — FAQ.

Direct answers, no marketing fluff. Missing one? Email hello@splitforms.com.

01Does this event rsvp work on Astro?

Yes. The form is plain HTML with a single POST endpoint, so it runs on any Astro site without server-side code, plugins, or SDKs. Drop the snippet into a Astro page or component and submissions land in your splitforms dashboard.

02How much does the event rsvp cost on Astro?

Free for 500 submissions per month — no credit card, no trial. Pro is $5/mo for 5,000 submissions, and there's a one-time $59 3-year plan (15,000 submissions/mo for 36 months). The same pricing applies regardless of which framework hosts the form.

03Can I customize the fields?

Yes. The template ships with sensible defaults (your name, email, will you attend?, how many guests are you bringing?…) — add, remove, or rename any of them. Splitforms accepts whatever fields you POST.

04How does spam protection work on the event rsvp?

A hidden honeypot field catches dumb bots, and a tuned classifier scores the rest. You only see real submissions in your dashboard. No CAPTCHA, no friction for human users — and it works the same on Astro as on any other framework.

05Can I send the event rsvp submissions to Slack or Discord?

Yes. Webhooks are available on Starter and above, with auto-formatted payloads for Slack, Discord, and WhatsApp (via CallMeBot). Or send raw signed JSON to any URL — Zapier, n8n, your own server. Configure in the splitforms dashboard.

06Will it work on a static Astro site?

Yes — the form posts directly to splitforms from the browser, so no server is involved. Works on Vercel, Netlify, GitHub Pages, Cloudflare Pages, S3, or any plain Apache host.

07Why not just use Eventbrite or Splash?

For free events, both charge subscription fees ($30-100/mo for white-label) plus per-ticket fees. The form costs $0, lives on your own domain (which matters for weddings and brand events), and the data is yours — not licensed inside their platform.

08Can I send a calendar invite (.ics) automatically?

Yes — generate an .ics file and attach to the auto-responder. Webhook to a Zapier / Make automation that crafts the .ics with event title, date, location, and notes. Most email clients render the attachment as 'add to calendar' inline.

09How do I handle plus-ones?

Add 'plus-one yes/no' and a name field that appears conditionally. For weddings, the 'plus-one allowed' is invitation-specific — capture invitation code on the form, and the webhook validates whether that invite includes a plus-one before accepting the second name.

§ 07Comparisonvs Web3Forms · vs Formspree

splitforms vs everything else.

Same drop-in API. More free submissions, Starter signed webhooks, MCP support no other backend has.

Feature	Web3Forms	Formspree	splitforms
Free monthly submissions	250	50	500
Custom fields beyond contact	Yes	Pro tier	Free
Webhooks (Slack / Discord)	Pro tier	Pro tier	Free, signed
AI / MCP submission inbox	No	No	Yes
Long-term plan (3-year flat)	—	—	$59 every 3 years

§ 08More templates for Astro5 adjacent patterns

Ship a event rsvp on Astro in 60 seconds.

500 submissions per month, free forever. No credit card. Copy the snippet above and paste it into your Astro project.

Get free access key →Read the docs

founders pricing locked in · early access open

Event RSVP for Astro

Why Astro developers choose splitforms for event rsvp

Yes — this is the shortest safe path for Astro.

Paste the HTML version, then replace YOUR_ACCESS_KEY.

Built for Astro developers who hate operating a backend.

Drop into any Astro project.

Generate, embed, receive.

Generate a free splitforms key

Paste the event rsvp into your Astro project

Receive submissions

The reason this event rsvp exists.

Capture attendance and party

Update the running list

Confirm via email

What changes when this event rsvp lives in Astro.

PUBLIC_ prefix is required for client-exposed env vars

client:load on the form island defeats the point of Astro

Astro Actions need a try/catch or they crash the page

View Transitions can break form re-submit state

Pattern A — pure HTML form (zero JS shipped)

Pattern B — Astro Action for typed server-side proxying

What every field actually does.

Your name

Email

Will you attend?

How many guests are you bringing?

Dietary preferences

One backend. Every framework.

Event RSVP on Astro — FAQ.

splitforms vs everything else.

Other ready-to-ship Astro forms.

Ship a event rsvp on Astro in 60 seconds.