RCS-Box is a multi-tenant API for Google RCS Business Messaging, with EU hosting and a German contract partner. It supports text messages with suggestions, rich cards, carousels and XL messages, as well as automatic video and image unfurling. Webhooks can deliver incoming messages and opt-in or opt-out events; forwarded webhook requests carry an HMAC-SHA256 signature calculated with the tenant API key. Each tenant has its own API key and brand-level isolation. The country allowlist can be configured per tenant and defaults to Germany’s +49 prefix. The API handles STOP and START blacklist status per agent. Plans can use standard mode or newsletter mode, where billing is based on active recipients each month. XL messages are available on all plans from Skizze and count as one conversation. Authenticated requests use a tenant-specific 64-character hexadecimal API key in Bearer or X-API-Key headers. The Free plan is 0.00 EUR per free for 100 sessions per calendar month. Skizze costs 49.00 EUR per month, Atelier 249.00 EUR per month and Manufaktur 999.00 EUR per month. It is aimed at development teams and technology leaders in startups, scale-ups and enterprise technology units.
Who it is for
RCS-Box suits development teams and technology leaders who need an API for Google RCS Business Messaging. Its tenant isolation, webhook events and recipient-based newsletter mode may fit organizations managing multiple brands or messaging audiences.
What is good
- EU hosting and a German contract partner.
- Supports rich cards, carousels and automatic media unfurling.
- Tenant-specific keys provide brand-level isolation.
- Free plan includes 100 sessions per calendar month.
What to know first
- The Free plan is limited to 100 monthly sessions.
- Paid plans cost 49.00 EUR, 249.00 EUR or 999.00 EUR monthly.
- The default country allowlist is Germany’s +49 prefix.
Verdict
RCS-Box provides RCS messaging formats, tenant controls and webhook support through an API. Review the session allowance, country settings and plan prices before choosing a plan.
RCS-Box plans and pricing
All plansCompared on RCS messaging platforms
- Free plan
- Yes
- API access
- Yes
- Two-way messaging
- Yes
- Rich media messages
- Yes
- Verified sender
- Yes
- Delivery analytics
- Yes
- Webhook support
- Yes
