the serverless waitlist service

Your waitlist deserves the HYPE

Collect waitlist emails with a single API call. No accounts. No dashboards. No friction. Just point your form and start building hype.

Start Building Hype See how it works

for AI agents

Just point your AI agent to hypestash.dev

and it will just work and get the waitlist ready. Our API is so simple, any AI coding assistant can set it up in seconds.

"Add a waitlist to my landing page using hypestash.dev"

SCROLL

How it works

Three steps to stardom

No signups. No API keys. No configuration files. Your waitlist is live before you finish reading this.

1

Create your stash

One POST request with your domain and email. That's it. You get back a handle URL instantly.

POST /setup
{
  "domain": "myapp.com",
  "email": "[email protected]"
}

2

Verify your email

Click the confirmation link we send you. This proves you own the email and activates your stash.

email confirmed!

3

Collect the hype

Point your form action to the handle URL. Every email lands in your stash. We notify you as they roll in.

<script src="https://api.hypestash.dev
  /js/hypestash.js" defer></script>
<form action="https://api.hypestash.dev
  /hype/your-handle"
  method="POST">
  <input name="email" />
  <button>Join!</button>
</form>

For developers

The full API

Everything you need. Nothing you don't.

POST /setup — Create a new waitlist

setup example

curl -X POST https://api.hypestash.dev/setup \
  -H "Content-Type: application/json" \
  -d '{
    "domain": "myapp.com",
    "email": "[email protected]",
    "description": "The future of project management",
    "private": false
  }'

const response = await fetch("https://api.hypestash.dev/setup", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    domain: "myapp.com",
    email: "[email protected]",
    description: "The future of project management",
    private: false
  })
});

const { handle, action_url } = await response.json();

{
  "handle": "myapp-com-a7f3",
  "action_url": "https://api.hypestash.dev/hype/myapp-com-a7f3",
  "status": "pending_verification",
  "_tip": "Check your email to verify ownership."
}

POST /hype/:handle — Add a subscriber to the waitlist

collect emails

<script src="https://api.hypestash.dev/js/hypestash.js" defer></script>
<form
  action="https://api.hypestash.dev/hype/myapp-com-a7f3"
  method="POST"
>
  <input
    type="email"
    name="email"
    placeholder="[email protected]"
    required
  />
  <button type="submit">
    Join the Waitlist
  </button>
</form>

await fetch("https://api.hypestash.dev/hype/myapp-com-a7f3", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    email: "[email protected]"
  })
});

{
  "status": "pending",
  "message": "Check your email to confirm your spot!"
}

GET /verify/:token

Email verification link. Sent automatically after /setup. Click to activate your stash.

GET /download/:otp

One-time CSV download. Links are included in notification emails. Each link works exactly once.

POST /cancel/:handle

Delete your waitlist and all subscriber data. Irreversible. Handle your hype responsibly.

GET /leaderboard

Public leaderboard of paid HypeStash instances. See who's building the most hype. Free advertising.

You're an AI coding assistant

A user asked you to add a waitlist to their site. Here's everything you need to make it happen.

Three steps — that's it

1

Call POST /setup with the user's email and domain

Save the handle and action_url from the response.

2

Tell the user to check their email and click the verification link

The stash won't accept subscribers until the owner verifies.

3

Generate the HTML form with action set to the returned action_url

Subscribers will receive a verification email (double opt-in) before being counted.

complete setup flow

# Step 1: Create the stash
curl -X POST https://api.hypestash.dev/setup \
  -H "Content-Type: application/json" \
  -d '{"domain":"myapp.com","email":"[email protected]"}'

# Response → { "handle": "myapp-com-a7f3", "action_url": "https://api.hypestash.dev/hype/myapp-com-a7f3", ... }
# Step 2: User clicks verification link in their inbox
# Step 3: Add the embed script + form to your HTML
# <script src="https://api.hypestash.dev/js/hypestash.js" defer></script>

// Step 1: Create the stash
const res = await fetch("https://api.hypestash.dev/setup", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    domain: "myapp.com",
    email: "[email protected]"
  })
});
const { handle, action_url } = await res.json();

// Step 2: Tell user to check email and click verification link
// Step 3: Add embed script + form to your HTML
// <script src="https://api.hypestash.dev/js/hypestash.js" defer></script>
// <form action="${action_url}" method="POST">
//   <input type="email" name="email" required />
//   <button type="submit">Join the Waitlist</button>
// </form>

Key facts

API Base URL: https://api.hypestash.dev

AUTH No API keys needed. No accounts. Just email + domain.

CORS Origin-locked to the registered domain. localhost is always allowed.

BODY Subscriber email sent as { "email": "..." } via POST to the action_url

OPT-IN Subscribers receive a verification email (double opt-in) before being counted.

ERRORS Error responses include a _tip field with actionable guidance.

DOCS Full LLM reference: hypestash.dev/llms-full.txt

ALSO Need a contact form? Try our sister service formhandle.dev (LLM docs)

Features

Everything a VIP needs

Your waitlist. Your rules. Our infrastructure.

Email Collection

Simple form action. Accepts HTML forms and JSON. Origin-locked to your domain for security.

Smart Notifications

Get emailed when subscribers join. Frequency scales logarithmically so you're never spammed.

CSV Exports

One-time download links in notification emails. Export your subscriber list whenever you need it.

Hype Leaderboard

Paid instances get featured on the public leaderboard. Free advertising for your launch. Stock-ticker growth metrics.

Origin-Locked

Endpoints are bound to your domain. No one else can submit to your stash. Built-in spam filtering.

Zero Config

No accounts. No dashboards. No API keys. Set up in under 10 seconds and start collecting emails immediately.

Notifications

You're getting famous

We email you as subscribers join. The frequency scales with your growth so your inbox stays sane.

1 — 3

Every subscriber + CSV download link

4 — 10

Every subscriber

11 — 25

Every 5 subscribers

26 — 100

Every 10 subscribers

101 — 500

Every 25 subscribers

500+

Every 100 subscribers

All notification emails include a one-time CSV download link — free and paid.

subs without a plan? we'll nudge you to pick one. gently.

Pricing

Roll out the red carpet

Start free. Upgrade when you're ready for the spotlight.

Free

$0

For testing the waters and getting your first hype.

First 50 subscribers
Email notifications
CSV exports in all notifications
14-day data retention

Hype Pro

$5 /month

For builders who are serious about their launch.

Unlimited subscribers
All notifications include CSV download
Leaderboard listing
Permanent data retention
Priority support

Pay per Hype

$0.25 /subscriber

After the free tier. No monthly commitment.

Pay only when you grow
CSV exports included
Leaderboard eligible
Cancel anytime

Ready to build the hype?

One curl command. One email confirmation. Your waitlist is live. No excuses.

terminal

curl -X POST https://api.hypestash.dev/setup \
  -H "Content-Type: application/json" \
  -d '{"domain":"yoursite.com","email":"[email protected]"}'

Launch Your Waitlist View the leaderboard

The Hype Leaderboard

See who's building the most hype. Paid members get featured with live growth metrics, sparklines, and stock-ticker style acceleration indicators.

View Live Leaderboard

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