Live API · RCS · WhatsApp · SMS · Telegram

One API for every messaging channel

Deliver over the best available channel with automatic cascade, least-cost routing, delivery receipts and exactly-once idempotency — all built in.

curl node python
# Send over the best available channel
curl https://api.voltlinktech.com/v1/messages \
  -H "authorization: Bearer $VOLTLINK_KEY" \
  -H "idempotency-key: order-4817" \
  -d '{
    "to": "+15551234567",
    "channel_plan": ["rcs","whatsapp","sms"],
    "content": { "text": "Your code is 123456" }
  }'
import { VoltLink } from "voltlink";
const vl = new VoltLink(process.env.VOLTLINK_KEY);

await vl.messages.send({
  to: "+15551234567",
  channelPlan: ["rcs", "whatsapp", "sms"],
  content: { text: "Your code is 123456" },
});
from voltlink import VoltLink
vl = VoltLink(os.environ["VOLTLINK_KEY"])

vl.messages.send(
    to="+15551234567",
    channel_plan=["rcs", "whatsapp", "sms"],
    content={"text": "Your code is 123456"},
)
● 202 submitted · routed to sms/twilio · delivered in 1.2s
Powers messaging over
📱 RCS🟢 WhatsApp 💬 SMS✈️ Telegram
Built for reliability

A messaging platform, not just a gateway

Routing, billing, compliance and delivery tracking come standard — so you ship features, not carrier plumbing.

Automatic channel cascade

Define a channel plan and VoltLink walks it in order — RCS → WhatsApp → SMS → Telegram — using the first channel the recipient can receive on, per message, until one delivers.

💸

Least-cost routing

Picks the cheapest capable provider each send, with passive circuit-breaking around unhealthy carriers.

📬

Delivery receipts

Real carrier DLRs normalized to delivered/failed, with cost reconciliation and signed webhooks.

🔁

Idempotency

Retry safely — a key guarantees each message is submitted and billed exactly once.

🛡️

Verification & anti-fraud

Number lookup and SIM-swap checks gate risky OTP traffic before it ever leaves the platform.

📣

Campaigns & bulk

Throttled campaign sending, bulk imports, suppression lists and STOP/START keyword handling out of the box.

How it works

Send once. We handle the rest.

01 / SEND

One request

POST a recipient, a channel plan and your content. Authenticate with an API key. Everything is JSON.

02 / ROUTE

Smart routing

VoltLink checks channel eligibility, selects the least-cost healthy provider, and enforces funds & suppression.

📱 RCS🟢 WhatsApp💬 SMS
03 / DELIVER

Tracked delivery

Carrier DLRs stream back, normalized and reconciled. Signed webhooks notify your endpoint in real time.

4channels, one endpoint
<100mssubmit latency
100%DLR tracking
exactly-onceidempotent sends

Start sending in minutes

Create an account, grab an API key, and send your first message over any channel.