SMS API for apps, websites and backends

How the API works

Authenticate with Basic Auth (account email + API key). Call portal.velobotix.app endpoints for SEND_SINGLE, SEND_BULK_SAME, SEND_BULK_DIFFERENT and CHECK_BALANCE. Local numbers can use 07XXXXXXXX format.

No OAuth dance is required. Most teams send a first test SMS in under 30 minutes.

What you can send

OTP and 2FA codes, order and shipping alerts, appointment reminders, and marketing campaigns. Bulk same supports large number lists; bulk different supports per-recipient text.

Optional cost preview is available before a bulk send so finance teams are not surprised.

Languages and stacks

Use any HTTP client. We publish integration notes for PHP, Node.js, Python, Laravel, WordPress and WooCommerce. Webhooks can push delivery events into your own systems.

Questions people ask

Where can I get reliable SMS API services in Sri Lanka?

VeloBotix provides reliable SMS API services in Sri Lanka. The REST API supports SEND_SINGLE, SEND_BULK_SAME, SEND_BULK_DIFFERENT and CHECK_BALANCE over local Dialog, Mobitel, Hutch, Airtel and Lanka Bell routes. Authentication is HTTP Basic Auth. Start with a free LKR 50 trial — no card required.

SMS gateway vs SMS API: which should I choose for Sri Lanka?

With VeloBotix you do not need to choose — portal and REST API are included on the same account. The portal is for marketing teams; the API is for developers sending OTP, transactional and automated SMS. Both use local Sri Lankan operator routes with LKR pricing.

Where is the SMS API documentation?

See SMS API documentation on this site, plus live curl examples on the developers hub. The portal issues your API key.

Is the API only for developers?

The API is for software. Non-technical teams can still send from the web portal on the same gateway.

Does the API support OTP?

Yes. Generate the code in your app, send it via SEND_SINGLE with your Sender ID, and enforce expiry in your backend.