Form endpoint

Your endpoint

Each inbox has one, like https://inboxpanda.io/f/your-form-id. Find it in the inbox's Settings, under Messages in, with ready-made code for HTML, React and cURL.

A plain HTML form

<form action="https://inboxpanda.io/f/your-form-id" method="POST">
  <input name="name" required>
  <input name="email" type="email" required>
  <textarea name="message" required></textarea>
  <input name="_honey" style="display:none">
  <button>Send</button>
</form>

Every input needs a name: that's the field's name in your inbox. After sending, the visitor sees a thank-you page, or your own page if you set one.

Options

Fields that start with _ are options, not part of the message:

Field	What it does
_redirect	A page on the site your form is on, to send the visitor to after sending. A page on another site is ignored, and the visitor sees your thank-you page.
_subject	The subject line of your notification email.
_honey	A spam trap. Keep it hidden and empty: bots fill it in, people don't.

JSON and JavaScript

Post JSON instead of a form, and send Accept: application/json to get {"ok": true, "id": "…"} back instead of a thank-you page:

const res = await fetch("https://inboxpanda.io/f/your-form-id", {
  method: "POST",
  headers: { "Content-Type": "application/json", Accept: "application/json" },
  body: JSON.stringify({ name: "Ana", email: "ana@example.com", message: "Do you ship to Lisbon?" }),
})

The same works from a server, or with cURL:

curl https://inboxpanda.io/f/your-form-id \
  -H "Accept: application/json" \
  -d name=Ana -d email=ana@example.com -d message="Do you ship to Lisbon?"

File uploads

Send the form as multipart/form-data with an <input type="file">:

<form action="https://inboxpanda.io/f/your-form-id" method="POST" enctype="multipart/form-data">
  <input name="email" type="email" required>
  <input name="cv" type="file">
  <button>Send</button>
</form>

PDF, Word, text and image files are accepted, up to 4 MB per message in total. Uploads work once you've claimed the inbox, and count toward your plan's monthly upload allowance.

Limits

Each message counts toward your plan's monthly messages, except spam. On Free, the form stops taking messages at the monthly limit until the 1st. See Plans and billing.

Building with an AI tool

AI builders and coding assistants can read everything here from inboxpanda.io/llms.txt, and create an inbox for you. See MCP and CLI.