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Rayo SMSRayo SMS Docs

Rayo SMS Documentation

Everything you need to send bulk marketing campaigns, automate transactional notifications, manage sender IDs and contacts, protect customer privacy, and scale your SMS operations.
Quick Start (5 Min)Platform Overview

Explore by Topic

Section titled “Explore by Topic”

Sending & Scheduling SMS

Send single or bulk SMS campaigns, calculate GSM character limits, schedule future deliveries, and track delivery reports.



Explore Messaging guides →

Sender Identifiers

Register alphanumeric sender names (up to 11 characters) or confirm mobile telephone numbers via 5-digit SMS verification.



Manage Sender IDs →

Contacts & Groups

Maintain your address book, suppress opted-out or invalid numbers automatically, and bulk-import recipients into groups.



Manage Contacts & Groups →

Credits & Billing

Top up credits online with a card, via bank deposit, or on credit, review order history, and configure automated low-balance SMS alerts.



View Credits & Billing →

Privacy, Security & Team

Permanently mask sensitive SMS message bodies for GDPR compliance and invite developers to your team with role-based access.



Configure Privacy & Team →

Developers, API & Webhooks

Generate up to 25 API keys, authenticate against the REST API, and verify real-time delivery status webhooks with cryptographic signatures.



Developer & Webhook Setup →

White-Label Platform

Operate your own branded SMS SaaS business under your custom domain, connect your Stripe & bank accounts, and manage child users and orders.



White-Label Partner Guide →
Section titled “Popular Guides”
Character Limits, Encoding & Cost CalculationLearn how 160-character GSM encoding and 153-character concatenated segments work.
Message Masking & GDPR ComplianceAutomatically or manually scrub sensitive message content (such as OTPs) while retaining full delivery audit trails.
Delivery Callbacks (Webhooks)Receive real-time delivery reports on your server and rotate webhook signing secrets with zero downtime.
FAQ & TroubleshootingQuick answers to common questions about sender IDs, message delivery states, billing, and account setup.
Section titled “Quick Platform Links”
Sign In to Web App ↗Access your Rayo SMS dashboard (sms.rayo.gr) to send messages and manage your account.Create a Free Account ↗Register a new Rayo SMS account and start testing right away with Simulation Mode.Interactive API Reference ↗Full endpoint specifications, cURL & Ruby examples, and error codes (sms-api-docs.rayo.gr).