Send SMS via API
Connect your application to a high-performance SMS API to send, receive, and track your messages in real time.
With Prelude, your trusted SMS gateway, business communication becomes fast, automated, and secure.
What is an SMS API ?
A SMS API (Application Programming Interface) is a programming interface that allows your applications, websites, or CRM systems to send and receive text messages automatically.
Through a simple integration, you can automate all your communications, including :
Notifications
Notifications
Notifications
Alerts
Alerts
Alerts
Authentications codes
Authentications codes
Authentications codes
Marketing campaigns
Marketing campaigns
Marketing campaigns
The Prelude SMS API transforms how businesses communicate: fast, automated, and reliable.
The Prelude SMS API transforms how businesses communicate: fast, automated, and reliable.
The Prelude SMS API transforms how businesses communicate: fast, automated, and reliable.
Global capabilities
Global capabilities
Global capabilities
Scale to 230+ countries without extra integrations.
Instant Delivery
Instant Delivery
Instant Delivery
Send SMS messages directly through your API platform.
Send SMS messages directly through your API platform.
Status insights
Status insights
Status insights
Track message deliveries and receipts (DLRs) in real time.
+ 33 624606164
Android
10s ago
+ 206 342-8631
iOS
20s ago
+ 34 634701125
Android
5min ago
+ 39 614820364
iOS
7min ago
Why use an SMS API for your messaging?
Why use an SMS API for your messaging?
By centralizing your communication through a single, professional SMS gateway, you gain efficiency, accuracy, and reliability.
Automated
Automated
Automated
Automatic notifications
Order confirmations, delivery updates, alerts.
Time to show your friends your next fun picture !
now
Locket
You’ve got a new match waiting for you, go say hi!
now
Fruitz
Your favourite items are back in stock. Don’t miss them again!
now
Choose
It’s time to BeReal! Tap to capture a photo.
now
BeReal
Your ticket is ready! Find it in the app before the event.
now
Shotgun
Time to show your friends your next fun picture !
now
Locket
You’ve got a new match waiting for you, go say hi!
now
Fruitz
Your favourite items are back in stock. Don’t miss them again!
now
Choose
It’s time to BeReal! Tap to capture a photo.
now
BeReal
Your ticket is ready! Find it in the app before the event.
now
Shotgun
Shield
Shield
Shield
Secure
authentication
Secure authentication
Secure authentication
(OTP / 2FA): identity verification and login validation.
now
YourApp
5678 is your verification code for YourApp, click on it while it’s time !
Send
Send
Send
Marketing SMS campaigns:
Personalized promotional and loyalty messages.
now
Getaround
Thanks for riding with us! Your trip has ended successfully.
1 hour ago
Getaround
Vehicle unlocked. Have a safe trip!
3 hours ago
Getaround
Your trip is booked! Your car will be ready for pickup at 3:00 PM.
Easy to set up
Easy to set up
Easy to set up
How does the Prelude SMS API work?
How does the Prelude SMS API work?
It’s built on a secure and scalable cloud infrastructure designed to handle high volumes of traffic while maintaining excellent deliverability rates.
Easy to set up
curl https://api.prelude.dev/v2/verification \
-H 'Authorization: Bearer <TOKEN>' \
-H 'Content-Type: application/json' \
-d '{"target":{"type":"phone_number","value":"+33612345678"}}'
Compatible with PHP, Python, Java, Node.js and Go
Features
Prelude provides all the tools you need for professional, large-scale, and automated communication.
Unified SMS API
Send and receive SMS through a unified API platform.
Unified SMS API
Send and receive SMS through a unified API platform.
Unified SMS API
Send and receive SMS through a unified API platform.
Live Delivery Reports
Real-time delivery tracking, DLR reporting, and live spend monitoring.
Live Delivery Reports
Real-time delivery tracking, DLR reporting, and live spend monitoring.
Live Delivery Reports
Real-time delivery tracking, DLR reporting, and live spend monitoring.
Smart Campaign Management
Manage campaigns, and message templates.
Smart Campaign Management
Manage campaigns, and message templates.
Smart Campaign Management
Manage campaigns, and message templates.
Advanced API Security
Secure authentication: API keys, token-based access, GDPR compliance.
Advanced API Security
Secure authentication: API keys, token-based access, GDPR compliance.
Advanced API Security
Secure authentication: API keys, token-based access, GDPR compliance.
Cloud-Powered Performance
Reliable cloud infrastructure for uninterrupted service.
Cloud-Powered Performance
Reliable cloud infrastructure for uninterrupted service.
Cloud-Powered Performance
Reliable cloud infrastructure for uninterrupted service.
The advantages of choosing Prelude as your SMS gateway
The advantages of choosing Prelude as your SMS gateway
Prelude is a reliable, European-hosted SMS solution designed for businesses that demand performance, security, and simplicity.
Speed
Speed
Speed
High performance: 98%+ deliverability via direct operator routes.
+33612345678
1
2
3
4
0.028€
price
0.034€
price
0.048€
price
0.029€
price
convertion
86%
convertion
88%
Undelivered
Converted
Resources
Resources
Resources
Clear documentation and SDKs for rapid integration.
API
SDKs
Control
Control
Control
Intuitive dashboard for campaign, message tracking and monitor spending.
1%
Conversion Rate
88%
iOS
92%
Android
Growth
Growth
Growth
Unlimited scalability: REST API and HTTPS protocols supported.
Support
Support
Support
Expert local support to assist your technical integration.
Transparent, Commitment-Free Pricing
Transparent, Commitment-Free Pricing
Transparent, Commitment-Free Pricing
Pay as you go
No hidden fees or setup costs.
Flexibles rates
Pricing adjusts based on your volume and destinations.
Flexibles rates
Pricing adjusts based on your volume and destinations.
Simple billing
A user-friendly interface with detailed reporting.
Clear, transparent global pricing by country.
A fully predictable pricing model, perfect for growing businesses and SaaS platforms.
FAQ
Everything you need to know about Prelude, the best Twilio Verify alternative.
What types of SMS can I send with the Prelude API?
With Prelude’s SMS API, you can send transactional messages, OTP verifications, notifications, and marketing campaigns directly from your applications.
Messages are routed through direct operator connections, ensuring secure, fast, and reliable delivery.
Typical examples include:
Order confirmations and delivery notifications.
2FA codes and password resets.
Appointment reminders and service alerts.
Personalized marketing campaigns and promotional offers.
Prelude’s business-grade API enables instant, high-quality communication with your customers at scale.
What types of SMS can I send with the Prelude API?
With Prelude’s SMS API, you can send transactional messages, OTP verifications, notifications, and marketing campaigns directly from your applications.
Messages are routed through direct operator connections, ensuring secure, fast, and reliable delivery.
Typical examples include:
Order confirmations and delivery notifications.
2FA codes and password resets.
Appointment reminders and service alerts.
Personalized marketing campaigns and promotional offers.
Prelude’s business-grade API enables instant, high-quality communication with your customers at scale.
What types of SMS can I send with the Prelude API?
With Prelude’s SMS API, you can send transactional messages, OTP verifications, notifications, and marketing campaigns directly from your applications.
Messages are routed through direct operator connections, ensuring secure, fast, and reliable delivery.
Typical examples include:
Order confirmations and delivery notifications.
2FA codes and password resets.
Appointment reminders and service alerts.
Personalized marketing campaigns and promotional offers.
Prelude’s business-grade API enables instant, high-quality communication with your customers at scale.
Is the Prelude SMS API compatible with my system?
Yes. Prelude is fully compatible with all major systems — CRM, ERP, SaaS, and e-commerce platforms.
Based on REST/JSON, the API integrates easily with a simple HTTPS request and is designed to work seamlessly with most programming environments.
Prelude also provides:
SDKs and code libraries for Java, Python, Ruby, and Node.js.
Dashboard test numbers and free credits for real message testing.
Real people, fast response available via Slack
This makes Prelude’s API both developer-friendly and accessible to any business.
Is the Prelude SMS API compatible with my system?
Yes. Prelude is fully compatible with all major systems — CRM, ERP, SaaS, and e-commerce platforms.
Based on REST/JSON, the API integrates easily with a simple HTTPS request and is designed to work seamlessly with most programming environments.
Prelude also provides:
SDKs and code libraries for Java, Python, Ruby, and Node.js.
Dashboard test numbers and free credits for real message testing.
Real people, fast response available via Slack
This makes Prelude’s API both developer-friendly and accessible to any business.
Is the Prelude SMS API compatible with my system?
Yes. Prelude is fully compatible with all major systems — CRM, ERP, SaaS, and e-commerce platforms.
Based on REST/JSON, the API integrates easily with a simple HTTPS request and is designed to work seamlessly with most programming environments.
Prelude also provides:
SDKs and code libraries for Java, Python, Ruby, and Node.js.
Dashboard test numbers and free credits for real message testing.
Real people, fast response available via Slack
This makes Prelude’s API both developer-friendly and accessible to any business.
How can I track the delivery status of my SMS?
Every message sent via Prelude includes a real-time delivery receipt (DLR).
You can monitor and analyze all message statuses directly from your Prelude dashboard or via API webhooks.
Available tracking data includes:
Delivery status (sent, delivered, failed).
Timestamp and message ID.
Routing information and response time.
You can also export these logs to measure your delivery performance and campaign efficiency over time.
How can I track the delivery status of my SMS?
Every message sent via Prelude includes a real-time delivery receipt (DLR).
You can monitor and analyze all message statuses directly from your Prelude dashboard or via API webhooks.
Available tracking data includes:
Delivery status (sent, delivered, failed).
Timestamp and message ID.
Routing information and response time.
You can also export these logs to measure your delivery performance and campaign efficiency over time.
How can I track the delivery status of my SMS?
Every message sent via Prelude includes a real-time delivery receipt (DLR).
You can monitor and analyze all message statuses directly from your Prelude dashboard or via API webhooks.
Available tracking data includes:
Delivery status (sent, delivered, failed).
Timestamp and message ID.
Routing information and response time.
You can also export these logs to measure your delivery performance and campaign efficiency over time.
Is the Prelude SMS API secure and GDPR compliant?
Yes. Prelude is a European-hosted platform fully compliant with GDPR and SOC 2 Type II certification.
Security is a core priority of our infrastructure:
HTTPS/TLS encrypted connections for all communications.
Token-based API authentication and key rotation.
Data hosting within European data centers.
Prelude guarantees that all user data remains secure, private, and processed in Europe, ensuring full compliance with EU privacy laws.
Is the Prelude SMS API secure and GDPR compliant?
Yes. Prelude is a European-hosted platform fully compliant with GDPR and SOC 2 Type II certification.
Security is a core priority of our infrastructure:
HTTPS/TLS encrypted connections for all communications.
Token-based API authentication and key rotation.
Data hosting within European data centers.
Prelude guarantees that all user data remains secure, private, and processed in Europe, ensuring full compliance with EU privacy laws.
Is the Prelude SMS API secure and GDPR compliant?
Yes. Prelude is a European-hosted platform fully compliant with GDPR and SOC 2 Type II certification.
Security is a core priority of our infrastructure:
HTTPS/TLS encrypted connections for all communications.
Token-based API authentication and key rotation.
Data hosting within European data centers.
Prelude guarantees that all user data remains secure, private, and processed in Europe, ensuring full compliance with EU privacy laws.
How is the SMS API pricing structured?
Pay-As-You-Go (default)
Best for: teams who want to launch quickly, stay flexible, and pay only for real usage.
How it works:
Each SMS is charged at the public carrier price.
This price doesn’t change with volume and Prelude doesn’t take margin on it.
Prelude charges a service license fee per message sent.
This is the API/service fee for using the platform.
You get a real-time billing dashboard to track usage and export invoices anytime.
No subscription, no commitment, no platform fee — just usage.
In short: you pay the public SMS cost plus a Prelude service license fee per SMS, with zero lock-in.
License Plan (post-paid + discounted)
Best for: companies with consistent or high volumes that want lower unit costs and monthly invoicing.
How it works:
You move from pre-paid credits to post-paid billing with monthly invoices.
You unlock:
Discounted per-SMS API fees (lower unit pricing),
Custom volume tiers aligned with your expected usage,
Optional upgrades like tailored routing, SLA, or dedicated support (when relevant).
You keep the same transparent dashboard, just with better economics at scale.
In short: the same usage-based logic, but cheaper per SMS and billed monthly once you scale.
How is the SMS API pricing structured?
Pay-As-You-Go (default)
Best for: teams who want to launch quickly, stay flexible, and pay only for real usage.
How it works:
Each SMS is charged at the public carrier price.
This price doesn’t change with volume and Prelude doesn’t take margin on it.
Prelude charges a service license fee per message sent.
This is the API/service fee for using the platform.
You get a real-time billing dashboard to track usage and export invoices anytime.
No subscription, no commitment, no platform fee — just usage.
In short: you pay the public SMS cost plus a Prelude service license fee per SMS, with zero lock-in.
License Plan (post-paid + discounted)
Best for: companies with consistent or high volumes that want lower unit costs and monthly invoicing.
How it works:
You move from pre-paid credits to post-paid billing with monthly invoices.
You unlock:
Discounted per-SMS API fees (lower unit pricing),
Custom volume tiers aligned with your expected usage,
Optional upgrades like tailored routing, SLA, or dedicated support (when relevant).
You keep the same transparent dashboard, just with better economics at scale.
In short: the same usage-based logic, but cheaper per SMS and billed monthly once you scale.
How is the SMS API pricing structured?
Pay-As-You-Go (default)
Best for: teams who want to launch quickly, stay flexible, and pay only for real usage.
How it works:
Each SMS is charged at the public carrier price.
This price doesn’t change with volume and Prelude doesn’t take margin on it.
Prelude charges a service license fee per message sent.
This is the API/service fee for using the platform.
You get a real-time billing dashboard to track usage and export invoices anytime.
No subscription, no commitment, no platform fee — just usage.
In short: you pay the public SMS cost plus a Prelude service license fee per SMS, with zero lock-in.
License Plan (post-paid + discounted)
Best for: companies with consistent or high volumes that want lower unit costs and monthly invoicing.
How it works:
You move from pre-paid credits to post-paid billing with monthly invoices.
You unlock:
Discounted per-SMS API fees (lower unit pricing),
Custom volume tiers aligned with your expected usage,
Optional upgrades like tailored routing, SLA, or dedicated support (when relevant).
You keep the same transparent dashboard, just with better economics at scale.
In short: the same usage-based logic, but cheaper per SMS and billed monthly once you scale.
How fast are SMS deliveries through Prelude’s API?
Prelude’s infrastructure is optimized for real-time messaging, with average delivery times under three seconds per SMS.
Thanks to direct operator routing and redundant servers, Prelude clients average >98% deliverability, even during high-traffic periods.
This makes it ideal for critical messages like OTPs, alerts, or system notifications that demand instant delivery.
How fast are SMS deliveries through Prelude’s API?
Prelude’s infrastructure is optimized for real-time messaging, with average delivery times under three seconds per SMS.
Thanks to direct operator routing and redundant servers, Prelude clients average >98% deliverability, even during high-traffic periods.
This makes it ideal for critical messages like OTPs, alerts, or system notifications that demand instant delivery.
How fast are SMS deliveries through Prelude’s API?
Prelude’s infrastructure is optimized for real-time messaging, with average delivery times under three seconds per SMS.
Thanks to direct operator routing and redundant servers, Prelude clients average >98% deliverability, even during high-traffic periods.
This makes it ideal for critical messages like OTPs, alerts, or system notifications that demand instant delivery.
What makes Prelude different from other SMS API providers?
Prelude stands out as a European-hosted, GDPR-compliant SMS gateway built for reliability and transparency.
Key differentiators:
Infrastructure located in France and the EU.
Built-in anti-fraud protection with a 4-layer AI-powered system that filters abuse and ensures only legitimate users can receive OTPs and log in.
Transparent, usage-based pricing with no hidden costs.
Simple REST API and clear SDKs for fast deployment.
Real people support, fast response available via Slack.
Prelude combines enterprise-grade technology with a human-centric approach, ensuring both performance and peace of mind.
What makes Prelude different from other SMS API providers?
Prelude stands out as a European-hosted, GDPR-compliant SMS gateway built for reliability and transparency.
Key differentiators:
Infrastructure located in France and the EU.
Built-in anti-fraud protection with a 4-layer AI-powered system that filters abuse and ensures only legitimate users can receive OTPs and log in.
Transparent, usage-based pricing with no hidden costs.
Simple REST API and clear SDKs for fast deployment.
Real people support, fast response available via Slack.
Prelude combines enterprise-grade technology with a human-centric approach, ensuring both performance and peace of mind.
What makes Prelude different from other SMS API providers?
Prelude stands out as a European-hosted, GDPR-compliant SMS gateway built for reliability and transparency.
Key differentiators:
Infrastructure located in France and the EU.
Built-in anti-fraud protection with a 4-layer AI-powered system that filters abuse and ensures only legitimate users can receive OTPs and log in.
Transparent, usage-based pricing with no hidden costs.
Simple REST API and clear SDKs for fast deployment.
Real people support, fast response available via Slack.
Prelude combines enterprise-grade technology with a human-centric approach, ensuring both performance and peace of mind.
How can I get technical support or integration help?
Our expert support team is available to assist you at every step — from setup to optimization.
We help you:
Integrate the API and configure authentication.
Run Proof of Concept and troubleshoot errors.
Optimize your deliverability and analyze campaign data.
You can reach us directly from the Prelude dashboard, by email, or through Slack dedicated channel.
Comprehensive API documentation and developer guides are also available online.
How can I get technical support or integration help?
Our expert support team is available to assist you at every step — from setup to optimization.
We help you:
Integrate the API and configure authentication.
Run Proof of Concept and troubleshoot errors.
Optimize your deliverability and analyze campaign data.
You can reach us directly from the Prelude dashboard, by email, or through Slack dedicated channel.
Comprehensive API documentation and developer guides are also available online.
How can I get technical support or integration help?
Our expert support team is available to assist you at every step — from setup to optimization.
We help you:
Integrate the API and configure authentication.
Run Proof of Concept and troubleshoot errors.
Optimize your deliverability and analyze campaign data.
You can reach us directly from the Prelude dashboard, by email, or through Slack dedicated channel.
Comprehensive API documentation and developer guides are also available online.
Start sending SMS with Prelude today
Connect your application, automate your communications, and enjoy enterprise-grade reliability from day one.