Phone Verification with Sendly

Quick start

import Sendly from "@sendly/node";

const sendly = new Sendly(process.env.SENDLY_API_KEY!);

const verification = await sendly.verify.send({ to: "+15551234567" });
console.log(verification.id); // ver_abc123

const result = await sendly.verify.check(verification.id, { code: "123456" });
console.log(result.status); // "verified" | "failed" | "expired"

REST API

Base URL: https://sendly.live/api/v1

Send OTP

curl -X POST https://sendly.live/api/v1/verify \
  -H "Authorization: Bearer $SENDLY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"to": "+15551234567", "app_name": "MyApp", "code_length": 6, "timeout_secs": 300}'

Required: to (E.164 format)

Optional: app_name (shown in SMS), code_length (4–10, default 6), timeout_secs (default 300)

Response:

{
  "id": "ver_abc123",
  "status": "pending",
  "phone": "+15551234567",
  "expires_at": "2026-04-01T10:05:00Z"
}

In sandbox mode (sk_test_* keys), the response includes sandbox_code with the actual code.

Check code

curl -X POST https://sendly.live/api/v1/verify/ver_abc123/check \
  -H "Authorization: Bearer $SENDLY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"code": "123456"}'

Statuses: verified, failed (wrong code), expired, max_attempts_exceeded (3 attempts max)

Resend OTP

curl -X POST https://sendly.live/api/v1/verify/ver_abc123/resend \
  -H "Authorization: Bearer $SENDLY_API_KEY"

Hosted verification sessions

Zero-code verification UI hosted by Sendly:

curl -X POST https://sendly.live/api/v1/verify/sessions \
  -H "Authorization: Bearer $SENDLY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"success_url": "https://yourapp.com/verified?token={TOKEN}", "brand_name": "MyApp"}'

Returns a url the user visits. After verification, redirects to success_url with a token. Validate the token server-side:

curl -X POST https://sendly.live/api/v1/verify/sessions/validate \
  -H "Authorization: Bearer $SENDLY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"token": "tok_from_redirect"}'

Node.js SDK

import Sendly from "@sendly/node";
const sendly = new Sendly(process.env.SENDLY_API_KEY!);

const v = await sendly.verify.send({ to: "+15551234567", appName: "MyApp" });
const check = await sendly.verify.check(v.id, { code: "123456" });
const resend = await sendly.verify.resend(v.id);
const session = await sendly.verify.sessions.create({ successUrl: "https://app.com/done?token={TOKEN}", brandName: "MyApp" });
const validated = await sendly.verify.sessions.validate({ token: "tok_xxx" });

Error handling

Sandbox testing

With sk_test_* keys, the sandbox_code field in the send response contains the code. No real SMS is sent. OTP to +15005550000 always works.

Full reference

• Verify API docs: https://sendly.live/docs/verify
• OTP tutorial: https://sendly.live/docs/tutorials/otp
• Error handling guide: https://sendly.live/docs/how-to/handle-otp-errors