OTP
One-time codes with short TTL.
Messaging
v1
Messaging API
SMS and WhatsApp delivery with receipts.
Send OTPs, alerts, and transactional messages across major networks. Track delivery status with webhooks and manage sender IDs from your workspace.
- SMS delivery across major networks
- WhatsApp templates (where provisioned)
- Delivery receipts via webhooks
- Sender ID management
POST /v1/messages
202 Accepted
{{ body|default:"{
\"status\": \"success\",
\"data\": { ... }
}" }}Auth
Rate limit
Version
Endpoints
Use cases
Where teams use Messaging API
Alerts
Transactional notifications at scale.
Campaigns
Batch sends with quiet hours controls.
Endpoints
Core surface
POST
/v1/messages
Queue an SMS or WhatsApp message.
GET
/v1/messages/{id}
Get message status and receipt metadata.
GET
/v1/sender-ids
List approved sender IDs for your workspace.
Pricing
Plans
Start free in sandbox. Scale when traffic grows.
Sandbox
Free
500 requests / month
Growth
USD 39
25,000 requests / month
Scale
USD 149
150,000 requests / month
FAQ
API FAQs
Practical answers before you integrate.
Can I send promotional SMS?
Yes where regulations and your sender ID allow it. Prefer transactional templates for OTPs and alerts.
Messaging API
Ready to integrate?
Open the docs for endpoint details, or request access and we'll help you go live.
- Free estimate · reply in 1 business day
- Production delivery · remote-first
- M-Pesa, cloud, and AI ready
Next step
Start your project
- 1 Tell us about your goals
- 2 Get a tailored proposal
- 3 Ship with LesterTechLabs