Forms that just work.
Zero backend.

const res = await fetch("https://api4form.com/f/YOUR_SLUG", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    name:    "Ada Lovelace",
    email:   "ada@example.com",
    message: "Hi — can I get a demo?",
  }),
});

// => { ok: true, message: "Thank you for your submission!" }

curl -X POST https://api4form.com/f/YOUR_SLUG \
  -H "Content-Type: application/json" \
  -d '{
    "name":  "Ada Lovelace",
    "email": "ada@example.com"
  }'

# => { "ok": true, "message": "Thank you for your submission!" }

<form action="https://api4form.com/f/YOUR_SLUG" method="POST">
  <input name="name"    type="text"  required />
  <input name="email"   type="email" required />
  <textarea name="message"></textarea>

  <!-- honeypot, hidden from humans -->
  <input name="_gotcha" type="text" class="sr-only" tabindex="-1" />

  <button type="submit">Send</button>
</form>