Integration

const data = { name: "Ryan", email: "[email protected]", message: "Hello!" };

const res = await fetch("http://formcore.io/f/YOUR_FORM_ID", {
 method: "POST",
 headers: { "Content-Type": "application/json" },
 body: JSON.stringify(data),
});

const result = await res.json();

// If a redirect URL is configured, the server includes it in the response.
// Navigate there, or handle the success inline.
if (result.redirect) {
 window.location.href = result.redirect;
} else {
 console.log("Submitted!", result.id);
}

Works from any JavaScript environment — browser, Node.js, Deno, or Bun. No libraries needed beyond the built-in fetch() API. If you configure a Success Redirect URL in the dashboard, it will be returned in the response as redirect.

import { useState } from "react";

function ContactForm() {
 const [status, setStatus] = useState("idle");

 async function handleSubmit(e) {
 e.preventDefault();
 setStatus("sending");
 const data = Object.fromEntries(new FormData(e.target));

 const res = await fetch("http://formcore.io/f/YOUR_FORM_ID", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify(data),
 });

 if (res.ok) {
  const result = await res.json();
  if (result.redirect) {
   window.location.href = result.redirect;
   return;
  }
  setStatus("success");
  e.target.reset();
 } else {
  setStatus("error");
 }
 }

 return (
 <form onSubmit={handleSubmit}>
  <input name="name" placeholder="Name" required />
  <input name="email" type="email" placeholder="Email" required />
  <textarea name="message" placeholder="Message" />
  <button disabled={status === "sending"}>
  {status === "sending" ? "Sending..." : "Send"}
  </button>
  {status === "success" && <p>Sent!</p>}
  {status === "error" && <p>Something went wrong.</p>}
 </form>
 );
}

Same approach works for Vue, Svelte, or any other framework — just POST JSON to the endpoint.

curl -X POST http://formcore.io/f/YOUR_FORM_ID \
 -H "Content-Type: application/json" \
 -d '{"name": "Ryan", "email": "[email protected]", "message": "Hello!"}'

Great for testing and server-to-server integrations.