Building Blocks / Voice

Phone Hub (Inbound)

Pick a number, set hours, and route inbound calls.

Drop-in widget. Load https://webforms.dropcowboy.com/latest/dropcowboy-phone-hub.min.js and pass it a site token your server mints. Do not rebuild number search, business hours, or call routing forms; the widget already does it.

Calling setup comes with the site token. Your page never configures SIP, STUN, or TURN servers; the script does.

When to use this vs REST

Use Phone Hub to let a user pick a number, set hours, and route inbound calls inside your app. Use REST to rent numbers or list lines from a backend.

Do not rebuild

Number search and purchase.
Business hours and inbound routing forms.

Drop-in

On your server, trade your API key for a short-lived site token (the key needs numbers:write):

// Your server. Browser code never sees KEY/SECRET.
app.post('/dropcowboy/token', async function (req, res) {
  const r = await fetch('https://api-v2.dropcowboy.com/phone/public/embed/token', {
    method: 'POST',
    headers: {
      'x-key': process.env.DC_KEY,
      'x-secret': process.env.DC_SECRET,
      'Content-Type': 'application/json'
    },
    body: JSON.stringify({ site_id: process.env.DC_SITE_ID, scope: ['phone:hub'], ttl_seconds: 900 })
  });
  const body = await r.json();
  if (!r.ok) return res.status(r.status).json(body);
  // The API wraps results in data. Hand the browser just the token.
  res.json({ token: body.data.token, expires_at: body.data.expires_at });
});

Or test the mint with cURL:

# On your server: trade your API key (needs numbers:write) for a site token. 1 hour max.
curl -s -X POST https://api-v2.dropcowboy.com/phone/public/embed/token \
  -H "x-key: $KEY" -H "x-secret: $SECRET" \
  -H "Content-Type: application/json" \
  -d '{"site_id":"YOUR_SITE_ID","scope":["phone:hub"],"ttl_seconds":900}'

Load the script, init with the token, and call a method:

<script src="https://webforms.dropcowboy.com/latest/dropcowboy-phone-hub.min.js"></script>
<div id="phone-hub-slot"></div>
<script>
(async function () {
  const minted = await fetch('/dropcowboy/token', { method: 'POST' }).then(function (r) { return r.json(); });
  await DropCowboy.phoneHub.init({ token: minted.token });
  DropCowboy.phoneHub.setTheme({ theme: 'LIGHT', primaryColor: '#009efb' });
  DropCowboy.phoneHub.addErrorListener(function (event) {
    console.error(event);
  });
  document.getElementById('rent-number').addEventListener('click', function () {
    DropCowboy.phoneHub.openNumberPicker({ container: '#phone-hub-slot' });
  });
})();
</script>

JS API / HTML tag

Method	What it does
`init({ token })`	Requires a site token with phone:hub.
`setTheme({ theme, primaryColor })`	LIGHT/DARK plus accent.
`openHub({ container })`	Opens the full inbound hub (numbers, hours, routes).
`openNumberPicker({ container })`	Opens the DID search and rent flow.
`addErrorListener(fn) -> stop`	Fires on rent or update errors.
`close()`	Unmounts the hub.

HTML tag:

<dc-phone-hub></dc-phone-hub>

Auth and scopes

Site token with the phone hub scope. Your API secret stays on your server.

Site token scope: phone:hub. Mint it with POST https://api-v2.dropcowboy.com/phone/public/embed/token using an API key with numbers:write. Tokens last up to one hour.

Limits

Site tokens last at most one hour (the default). Mint a fresh one per page load or session; do not cache one across users.
Calls and texts need a connected carrier (BYOC) and prepaid balance. Without them the mint returns 402 or 403 for telephony scopes.
E911 and caller name (CNAM) are set in Drop Cowboy®, not in the widget.

Routes are on https://api-v2.dropcowboy.com.

POST /phone/public/numbers/rent - rent a number
GET /phone/public/lines - list your numbers
POST /phone/public/embed/token - mint the site token

Full reference: Embed site tokens.