RCS Business Messaging API

Smart messaging starts
with LEKAB RCS API

Integrate and build interactive, verified and branded conversations with our RCS Business Messaging API. Engage customers where it matters – directly in their default messaging app.

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LEKAB - secure
Secure & verified

Protect your brand and your users with verified senders and encrypted delivery.

LEKAB - Integrations
Easy to integrate

Save time with modern REST APIs and support from our expert team.

LEKAB - Result
Better results

See higher open and engagement rates compared to traditional SMS campaigns.

SMS is limited. RCS changes everything.

Text messaging hasn’t kept up with your business. SMS lacks branding, media, and security, and it’s easy to ignore. Our RCS Business Messaging API lets you create verified, interactive conversations that drive engagement and trust.

  • Add rich media, carousels, and buttons
  • Deliver verified, secure messages
  • One API, endless use cases
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What makes our RCS Business Messaging API stand out

Built for developers

Speed up integration with clear documentation, code samples, and a developer-friendly RESTful API. Get started quickly with modern tools and support when you need it.

 • REST API with JSON
 • OpenAPI/Swagger docs
 • Webhooks
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Designed for business outcomes

Turn notifications into conversations. Verified branding, rich media, and analytics help marketing, logistics, and customer service teams deliver more meaningful customer journeys.

 • Higher engagement vs SMS
 • Branded, trusted sender ID
 • Track delivery, reads, and responses 

See how RCS drives results

Powerful architecture. Simple to deploy.

Easily integrate RCS into your platform or workflow. Our cloud-native infrastructure handles carrier connections, fallbacks to SMS, and Google verification – so you don’t have to.

  • Branded sender verification – Your logo, colours, and name – verified by Google
  • Interactive rich media – Add images, videos, carousels, suggested replies, and CTAs
  • Fallback to SMS – Automatically reach mobile devices who don’t support RCS
  • Advanced analytics – Track delivery, engagement, and conversion metrics
  • Carrier-grade reliability – Built for scale with 99.99% uptime and SLA support
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Let’s build better messaging together

Start sending verified, branded and rich messages. Whether you’re exploring RCS for the first time or scaling across regions, our team is here to help.

  • It’s a RESTful API that enables businesses to send rich, interactive, and verified messages to customers through RCS-enabled messaging apps, replacing traditional SMS with enhanced conversational experiences.

  • Choose a Sender ID/agent name, usually your company or brand name. Upload a non-transparent logo that works well in both light and dark modes, add a banner image, and write a brief profile description. Optionally, include contact details like phone number, email, and URLs for your website, terms of use, and privacy policy. Read more about the registration process.

  • You can send text, images, carousels, suggested replies, action buttons, and rich cards to create engaging customer conversations.

  • RCS enables richer, more interactive messaging with verified senders, branding, read receipts, suggested replies, and multimedia content, helping businesses create engaging, two-way conversations beyond simple text.

  • Our API automatically falls back to SMS when the recipient’s device or carrier does not support RCS, ensuring your messages always reach customers.

  • Yes, messages are sent through verified business profiles and encrypted channels to protect your brand and customers.

  • Contact us and register an agent to receive API credentials, access detailed documentation, and start testing before going live.

  • Yes, the API provides real-time analytics including delivery status, read receipts, and customer responses to help optimise campaigns.

  • RCS is currently widely supported on Android, with iOS support expanding as carriers and platforms adopt the standard – coming soon to the Nordics. Stay ahead and prepare your messaging for when RCS launches on iOS.

  • Pricing varies by country and operator. Generally, a standard RCS message costs the same as a single SMS. A single rich RCS message is charged at 1.5 times the standard rate, while conversational messages within a 24-hour window are billed at twice the standard rate.

  • Yes, the API is designed to integrate smoothly with your current platforms, enabling seamless messaging workflows and customer interactions.

  • Once registered and verified, you can start testing in sandbox environments immediately, with production access typically granted within days, depending on compliance and carrier approvals.

Learn more about RCS

  • What is RCS? The next generation of business messaging

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  • RCS: Ready to get started? A step-by-step guide for your business

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  • How to register your company for RCS Business Messaging (RBM)

    Read more

  • RCS - better protection against fraud

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  • The difference between RCS and RCS Business Messaging (RBM)

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  • Turn notifications into meaningful conversations with RCS

    Read more

  • Basic RCS – Get started with the new messaging format for businesses

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  • Exploring diverse use cases of RCS

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  • RCS Verified Sender protects businesses from smishing and fraud

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  • RCS use cases: how to structure your agents for success

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  • RCS message types explained: basic, single and conversation

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