Phone Validation API (API Ninjas)
Data Validation · Messaging & SMS
Phone validation and carrier lookup API formatting numbers to E.164 and detecting mobile carriers
Phone Validation API (API Ninjas) Highlights
Phone Validation API (API Ninjas) is best for apps and fintechs sending transactional SMS and OTPs that need phone format normalization and carrier checks
API Key (X-Api-Key header)
Free tier: up to 50,000 calls/month; 5 req/sec burst limit
Nigeria
Ghana
KenyaThe Phone Validation API by API Ninjas validates domestic and international telephone numbers for format correctness, country code, line type (mobile, landline, toll-free), and telecom carrier. 164 format.
For Nigerian developers building SMS OTP verification flows, this API allows checking whether a number is valid and identifying the telecom carrier (MTN, Airtel, Glo, 9mobile) prior to sending expensive SMS messages, reducing undelivered SMS costs and ensuring clean database records.
Phone Validation API (API Ninjas) Core Features & Capabilities
| Feature | Status | Description & Capabilities |
|---|---|---|
| Phone Number Format Validation | ✓ Supported | Provides native Phone Number Format Validation capabilities integrated within the API. |
| Bulk Data Validation | ✓ Supported | Provides native Bulk Data Validation capabilities integrated within the API. |
| Real-time API Validation | ✓ Supported | Provides native Real-time API Validation capabilities integrated within the API. |
| Error Code & Reason Detail | ✓ Supported | Provides native Error Code & Reason Detail capabilities integrated within the API. |
| Free Tier / Credits Available | ✓ Supported | Provides native Free Tier / Credits Available capabilities integrated within the API. |
| Email Format Validation | ✗ Not Supported | Email Format Validation is currently not supported by Phone Validation API (API Ninjas). |
| Address / Postcode Validation | ✗ Not Supported | Address / Postcode Validation is currently not supported by Phone Validation API (API Ninjas). |
| Nigerian BVN / NIN Format Check | ✗ Not Supported | This verification service is not offered by Phone Validation API (API Ninjas). |
- Free tier includes up to 50,000 API requests per month with an API key
- Paid plans from $10/month
Required Access Documents for Phone Validation API (API Ninjas)
- API Ninjas AccountRequiredRegister at api-ninjas.com to generate your API key
Different Phone Validation API (API Ninjas) use cases
- SMS Cost Optimization:Filter out invalid or landline phone numbers before initiating paid SMS OTP verification.
- Checkout Address Normalization:Clean customer contact phone numbers into international E.164 format for courier delivery.
- Telecom Carrier Routing:Identify recipient mobile networks to route SMS messages through optimal telco routes.