Number Lookup API
Know the number before you message it
Validate and format any phone number, then see its line type and carrier. Clean lists, route messages to the right channel and screen sign-ups before you spend on an OTP.
Example request
curl https://api.techalpha.io/v1/lookup/+14155550123 \ -H "Authorization: Bearer $TECHALPHA_KEY" \ -G -d fields="line_type,carrier"Lookup result
+1 415 555 0123
- Format
- Valid
- Line type
- Mobile
- Country
- United States
- Checked
Example request. Endpoints may change during early access.
What teams use Number Lookup for
Sign-up screening
Flag landlines and VoIP numbers before you send a code.
List hygiene
Format and validate numbers before a campaign goes out.
Channel routing
Pick SMS, WhatsApp or voice based on the line type.
Use Number Lookup from an AI agent
The Techalpha MCP server exposes Number Lookup 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
lookup_numberValidate and format a number, with optional line type and carrier
Add another channel with the same key
Start building with Number Lookup
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.