OTP SMS
Mission-critical one-time passwords with dedicated high-priority routes and sub-3 second delivery.
- Ultra-low latency routes
- Auto-retry & failover
- Numeric & alphanumeric OTPs
DLT-compliant SMS gateway with industry-best delivery rates. Send transactional, promotional and OTP SMS across 190+ countries from a single, developer-friendly API.
With 98% open rates and universal reach — on every phone, on every network, without internet — SMS remains the most reliable channel for time-sensitive, mission-critical messaging.
Bulk SMS is the practice of sending a large volume of text messages to customers, employees or stakeholders from a business sender ID. At 2Factor.in, we operate carrier-grade SMS infrastructure with direct interconnects to all major Indian and international telecom operators, giving your messages the shortest path — and the highest chance of delivery.
Whether you're sending a one-time password, an order update, a payment reminder or a promotional campaign, our Bulk SMS API handles billions of messages every year with sub-3 second OTP latency and 99% delivery success.
Mission-critical one-time passwords with dedicated high-priority routes and sub-3 second delivery.
Order confirmations, payment receipts, shipment alerts and account notifications at any time of day.
High-engagement marketing campaigns, offers and announcements with advanced segmentation.
Native-script messaging in Hindi, Marathi, Tamil, Telugu, Bengali and 17 more Indian languages.
Automatic URL shortening with per-user tracking, click analytics and UTM tagging built in.
Reach customers worldwide with direct carrier connections in 190+ countries and USD billing.
Dedicated high-priority routes and smart retry logic deliver OTPs faster than any other provider in India.
Seamless integration with Jio, Airtel, Vi and BSNL DLT portals. We handle template & entity registration.
Per-message DLRs, route-level performance, conversion tracking and exportable reports.
Multiple routes per destination with automatic fallback ensure no OTP is ever lost in transit.
Receive inbound SMS on dedicated long & short codes with webhook delivery in real time.
AI-driven route selection optimizes for speed, cost or operator-level delivery success in real time.
Clean REST API, SDKs for 6 languages, comprehensive docs and a sandbox for risk-free testing. Get your API key, hit our endpoint, and your first SMS is on its way.
# Send an OTP SMS with 2Factor — Python
import requests
url = "https://2factor.in/API/V1/OTP/SEND"
payload = {
"to": "+919876543210",
"template_name": "LOGIN_OTP",
"var1": "472918"
}
headers = { "X-API-Key": "your_api_key" }
res = requests.post(url, json=payload, headers=headers)
print(res.json())
# {"status":"sent","session_id":"a1b2..."}Pay only for what you send. Volume discounts automatically applied.
Perfect for startups and small apps just getting started.
For scaling businesses that need reliability and speed.
Committed volumes, dedicated routes and 24×7 support.