SMS API
A2P SMS for alerts, reminders and replies
Send one message or a million over Techalpha's A2P routes across the US, India and beyond. Get delivery receipts on a webhook and receive replies on the same thread.
Example request
curl https://api.techalpha.io/v1/messages \ -H "Authorization: Bearer $TECHALPHA_KEY" \ -d channel="sms" \ -d to="+14155550123" \ -d text="Your order #1234 ships today."SMS · +1 415 555 0123
Your order #1234 ships today.
- Queued
- Sent
- Delivered
Example request. Endpoints may change during early access.
What teams use SMS for
Transactional alerts
Order updates, payment receipts and fraud alerts.
Reminders
Appointments, renewals and due dates.
Two-way replies
Receive inbound messages and answer on the same thread.
Use SMS from an AI agent
The Techalpha MCP server exposes SMS as tools any MCP client can call. Your agent gets the same capability as your code, with the same key.
About the MCP serverPlanned tools
sms_sendSend an SMS to one numbermessage_statusRead delivery status for a sent message
Add another channel with the same key
Start building with SMS
Early access is open. Tell us what you're building and we'll set you up with OTP, lookup, messaging, voice and the MCP server.