The API to scale your
RCS
Marketing campaigns, transactional alerts, and delightful conversations — built with a developer-first SDK. Send your first message in minutes.
Python, TypeScript, Ruby, and an MCP server — pick your stack
Built by engineers from top companies, backed by the best
SMS
RCS
Interactive messaging, not plain text
RCS transforms simple text into interactive experiences with rich cards, high resolution photos and video, and quick replies. Without ever leaving their messaging app, users can enjoy seamless purchase journeys, instant surveys, and personalized support.
Try it outWe get your RCS agent 2-3x faster
With Pinnacle, we get you up and running in less than an hour and a live agent in 4 weeks by automating compliance on your behalf
from rcs import Pinnacle
client = Pinnacle(
api_key="<api_key>"
)
client.messages.rcs.send(
request={
"from_": "agent_pinnacle",
"to": "+14154746461",
"text": "Check out our website for more information!",
"quick_replies": [
{
"type": "openUrl",
"payload": "https://www.pinnacle.sh/",
"title": "Open Url"
}
]
}
)Deliverability
Every message delivered
Identify if a phone number can receive RCS ahead of time, number lookup for deliverability, and get higher throughputs with secondary vetting and short codes
Collaboration
View conversations in real time
Send RCS and SMS messages, share conversations and specific messages with your team, and add contact info and notes for each conversation
Development
Elevate your developer experience
With webhooks that make the transition from dev to prod seamless to our end-to-end compliance API, Pinnacle makes it easy to iterate on new messaging flows.
Start Messaging Today
SMS, MMS, and RCS on one API — priced for your volume.
One plan. Every feature.
Custom pricing tailored to your volume and use case. Book a demo and we'll get you live in days, not weeks.
We'll match and beat your current per-message price
Messaging
- SMS, MMS, RCS, and iMessage on one API
- Rich cards, carousels, and quick replies
- Unlimited RCS agent registrations
- Bulk sends and audience segmentation
Compliance & Delivery
- 10DLC and Toll-Free registration
- Expedited white-glove approvals
- Priority carrier relationships
- Number intelligence and lookup
Developer Experience
- Webhooks and comprehensive logs
- Test numbers and RCS test agents
- Audiences, contacts, and conversations
- Custom volume-based pricing
Enterprise
- Custom iMessage support
- Dedicated support engineer
- Custom SLA guarantees
- SSO/SAML and audit logs
30-minute working call with an engineer. We'll architect your messaging stack together — no slides.
We evaluated several RCS APIs and Pinnacle stood out for its RCS sandbox messaging, simple RCS agent submissions, and easy-to-understand API.
The Pinnacle team partnered with us every step of the way, including adding new features to better control RCS messages, handling our compliance, and ensuring deliverability.
Justin Zheng
Co-founder
90% reduction
in RCS agent application time
Start building with Pinnacle
One API for RCS, iMessage, MMS, and SMS. Upgrade your messaging and start building for the future.