The backend for your forms.

<form action="https://api.formstork.com/f/YOUR_KEY" method="POST">
  <input    name="email"   type="email" required>
  <textarea name="message"></textarea>
  <button>Send</button>
</form>

import { useFormstork } from "@formstork/react";

export default function Contact() {
  const { submit, isSuccess } = useFormstork({ accessKey: "YOUR_KEY" });
  if (isSuccess) return <p>Thanks!</p>;
  return (
    <form onSubmit={submit}>
      <input name="email" type="email" required />
      <textarea name="message" />
      <button>Send</button>
    </form>
  );
}

curl -X POST https://api.formstork.com/submit \
  -d access_key=YOUR_KEY \
  -d email=ada@example.com \
  -d message="Hello from the terminal"

<script src="https://app.formstork.com/js/widget-v1.js" defer
  data-form="YOUR_KEY"
  data-label="Contact us"></script>

Plain HTML needs zero dependencies. Prefer React? There's a typed SDK for that too.