Join Slack CommunitySMS API for CRM, ATS and Outreach Platforms
Enable your users to send, receive and sync SMS conversations directly inside your software. Universal reach, real time messaging, and optional RCS support.
Test the API for free
Connect Android phone number with one API
Connect real Android phone numbers to your software using a single, unified SMS API.
Send and receive SMS and RCS messages from personal Android devices only, with Apple iOS not supported. All conversations are fully synced with your CRM or ATS, built for reliable and scalable API integration.
Personal numbers, real conversations
When messages come from a real mobile number, reply rates increase, workflows become more natural and communication history stays tied to the right person in your CRM or ATS. With Unipile's SMS API, individual phone numbers are treated as secure, dedicated messaging channels across your platform.
One SMS API to connect every device
Your engineering team integrates once. Your users connect as many mobile devices as needed. Every SMS and RCS message is centralised, synchronised and accessible through the same unified API that powers LinkedIn, WhatsApp, Instagram and email. It's the fastest way to expand your communication stack without scaling complexity.
Add SMS to your product
With 98% open rate, SMS remains the most reliable and universal communication channel available today. Unlike WhatsApp, LinkedIn or email, it requires no app, no account and no network dependency. With a single SMS API integration, your platform gains a channel that reaches 100 percent of contacts and supports every critical workflow your users manage.
Universal reach for high-intent actions
Interview confirmations, reminders and urgent follow-ups work best on SMS. With an average 98% open rate, SMS is one of the most reliable channels to trigger immediate action. Unlike LinkedIn or WhatsApp, SMS lets you reach new contacts without strict provider limits. Every message is sent from a trusted personal number and synced directly into your CRM or ATS.
A perfect complement to multichannel workflows
LinkedIn, email and WhatsApp cover most outreach scenarios. SMS completes the stack. It acts as a fail-safe channel when other providers impose limits or delays. For outreach platforms and AI agents, SMS ensures continuity in high-intent workflows, with messages delivered, read and acted on almost instantly.
Key Features of the SMS API
Your users send and receive SMS from their personal numbers. Every message syncs instantly to your platform. When RCS is available, rich features activate automatically.
SMS API Use Cases: Sales, Recruiting and AI Agents
Unipile's SMS API strengthens every workflow that depends on fast, reliable and personal communication. Whether your platform serves sales teams, recruiters or AI automation engines, SMS becomes the universal channel that always reaches the right contact.
Sales teams
Sales reps can sync all their SMS conversations directly into your CRM, ensuring every interaction appears in the correct contact timeline.
Recruiters
Send interview confirmations, reminders and follow-ups via SMS. Candidate replies flow straight into the ATS.
AI agents
AI agents can send and receive SMS automatically, enabling fully autonomous outreach when other channels remain unanswered.
LinkedIn
Gmail
Me (Sales Rep)
10:30 AM
Mark Johnson
11:45 AM
Me (Sales Rep)
11:48 AM
Me (Recruiter)
5:09 PM
Sarah Chen
7:12 PM
Me (Recruiter)
7:15 PM
AI Agent
Auto • 9:00 AM
Lisa Park
9:45 AM
AI Agent
Auto • 9:46 AM
Sales teams
Sales reps sync SMS conversations directly into your CRM. Messages are sent using their own personal mobile number.
Me (Sales)
10:30 AM
Mark Johnson
11:45 AM
Me (Sales)
11:48 AM
Recruiters
Send interview confirmations and follow-ups via SMS. Candidate replies flow straight into your ATS.
Me (Recruiter)
5:09 PM
Sarah Chen
7:12 PM
Me (Recruiter)
7:15 PM
AI agents
AI agents send SMS automatically when other channels remain unanswered, enabling fully autonomous outreach.
AI Agent
Auto
Lisa Park
9:45 AM
AI Agent
Auto
Start Creating Your Feature Today
Try our White-Label solution for free and unlock its full potential for your business. With the 7-Day Free Trial, gain access to the complete suite of features designed to enhance your platform's capabilities and branding.
What's included
Build faster with one unified API
A single REST API, real-time webhooks, secure authentication, and complete developer tools. Everything you need to integrate communication channels in hours, not months.
HTTPS REST API with a Unified Schema
Integrate Unipile through a secure HTTPS REST API, or use our SDKs to accelerate implementation.
const message = await unipile.messaging.send({
provider: "whatsapp", // or "linkedin", "telegram"...
to: "+1234567890",
content: "Hello from Unipile!"
});
No Scraping
Direct API access to all providers. Better performance.
Time Saved
See the difference Unipile makes in your development workflow.
Extra Features
Access capabilities that don't exist in native APIs.
Webhooks & Real-Time Events
Instantly detect resource modifications and user behaviors. Receive events via webhooks with no polling required.
{
"event": "message.received",
"provider": "whatsapp",
"data": { "from": "+1234...", "content": "..." }
}
Simplified Infrastructure
No open connections to manage. We handle all the complexity.
Built-in Debug Tools
Comprehensive logging, test mode, and debugging tools included out of the box.
Unified Event Schema
Same event format regardless of provider. Write your webhook handler once.
Authentication on Behalf of Real Users
Authenticate real user accounts, no bots. Access data and perform actions on their behalf with full permission control.
Hosted Auth Page
White-label authentication page. No complex development needed.
Auto Problem Detection
Real-time alerts when issues occur. Automated reconnection prompts sent to users.
Account Protection
Built-in security to protect user accounts and ensure reliable access.
One dashboard for all your integrations
Manage all your LinkedIn, WhatsApp, Gmail accounts and more from a single, intuitive interface.
want to connect
Accounts
03/01/2025
02/15/2025
02/10/2025
03/01/2025
02/28/2025
02/20/2025
03/01/2025
02/25/2025
03/01/2025
02/22/2025
02/14/2025
02/12/2025
02/08/2025
02/05/2025
03/01/2025
02/15/2025
03/01/2025
02/22/2025