Click-to-call API for UK business phones

What the API does

Start a call in one request

Create a key in your dashboard under API, then:

curl -X POST https://www.siluxcall.co.uk/api/v1/calls \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"extension": "1001", "to": "01632960123"}'

The reply:

{
  "status": "ringing_extension",
  "extension": "1001",
  "to": "01632960123",
  "message": "Extension 1001 is ringing. When it is answered, we call 01632960123."
}

The same thing from a Cloudflare Worker, so a Call button in your own CRM works for every user:

// Cloudflare Worker, Node or any server. Never put the key in a web page.
export default {
  async fetch(request, env) {
    const { to, extension } = await request.json();
    return fetch("https://www.siluxcall.co.uk/api/v1/calls", {
      method: "POST",
      headers: {
        Authorization: "Bearer " + env.SILUX_API_KEY,
        "Content-Type": "application/json",
      },
      body: JSON.stringify({ to, extension }),
    });
  },
};

Built for UK teams

• Each user calls from their own extension, with your business number as caller ID.
• Rings the mobile app, browser softphone or desktop app, with any headset.
• UK landlines, mobiles and freephone numbers, the same rules as your phones.
• Call history and MP3 recordings straight into your CRM.
• Live webhooks as each call ends, missed call or voicemail arrives (CRM Integration page).
• OpenAPI 3.1 specification for developer tools and AI coding assistants.
• No per-call API fees. Included on Plus and above, £2.50 a month on Entry.

FAQs — Silux Call API