Send pre-recorded or text-to-speech voice broadcasts, run press-1 campaigns, schedule by timezone, and monitor realtime pickup & listening metrics — all via our API or dashboard.
Target thousands, handle retries & time windows.
Press-1 transfers, surveys and opt-outs.
Pickup rates, duration, and campaign trends.
Request sandbox keys and try broadcast endpoints or use the dashboard to upload lists, preview messages and run campaigns.
Built-in DNC filters, time-window scheduling and opt-out handling to keep campaigns legal and respectful.
200+ destinations, regional routing, local caller ID and country-specific configs.
Per-campaign budgets, retry policies and adaptive throttling to optimize spend.
Upload audio or use our text-to-speech engine in multiple languages and voices.
Configurable retry rules, dayparting and timezone-aware windows.
Export per-call CDRs, analytics, and KPI summaries in CSV/JSON.
CSV / API upload with tags and metadata.
Choose audio, retries, IVR actions and budgets.
Live dashboard with pick-up rates, listening time and transfers.
Trigger broadcasts via REST endpoints, receive webhook updates when calls are answered, pressed keys events or when call finishes. Supports JSON payloads and secure verification headers.
POST /v1/broadcasts
Authorization: Bearer <API_KEY>
Content-Type: application/json
{
"name": "Payment Reminder",
"audio_url": "https://cdn.instavoip.net/audio/reminder.mp3",
"recipients": ["+1234567890","+1987654321"],
"time_window": {"start":"09:00","end":"18:00","tz":"Asia/Kolkata"}
}
DNC checks, per-country restrictions and local rules configurable per campaign.
MP3/OGG/WAV. Preferred bitrates and sample rates listed in docs.
Full docs"Using Instavoip's voice broadcasting API we reached 50k users in hours — pickup and conversion rates were excellent."
Request sandbox access or schedule a technical walkthrough with our engineers.