CEQUENS SMS API
Integrate text messaging capabilities with RESTful API calls, supporting delivery receipts, two-way messaging, and Unicode content across 128+ countries with 99% uptime SLA.
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Simple APIs, powerful integrations
We design experiences that enable developers to embed communication capabilities into applications seamlessly. When APIs are intuitive with comprehensive documentation, integration happens in hours not weeks.
Products we recommend
Here's a list of handpicked CEQUENS products that can help developers build communication features faster with fewer dependencies.
CEQUENS WhatsApp Business API
Embed WhatsApp messaging into applications with official API access, enabling rich media messages, interactive buttons, and template-based communications with full webhook support.
Learn moreCEQUENS Voice API
Build voice calling features with programmable voice APIs supporting call routing, IVR menus, call recording, and real-time call control through simple HTTP requests.
Learn moreCEQUENS Number Lookup API
Validate and verify phone numbers in real-time, retrieve carrier information, check number portability, and prevent fraud with comprehensive number intelligence data.
Learn moreWhy developers choose CEQUENS
RESTful API architecture
Clean, intuitive REST APIs with predictable endpoints, standard HTTP methods, and JSON responses enable rapid integration without learning proprietary protocols or complex SDKs.
Comprehensive documentation
Interactive API documentation with code examples in multiple languages, detailed parameter descriptions, and real-world use case tutorials accelerate development from concept to production.
Multiple SDK support
Pre-built SDKs for Python, Node.js, PHP, Java, Ruby, and .NET eliminate boilerplate code and reduce integration time from weeks to hours with maintained, tested libraries.
Sandbox environment
Full-featured testing environment with free test credits enables complete integration testing and debugging before production deployment without affecting live systems or incurring costs.
Webhook support
Real-time event notifications via webhooks provide instant updates on delivery status, inbound messages, and call events, enabling reactive application logic without polling APIs.
Transparent error handling
Clear error codes, detailed error messages, and comprehensive troubleshooting guides help developers identify and resolve integration issues quickly without support tickets.
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Thousands of developers rely on our cloud communications platform to build powerful communication features into their applications with minimal complexity.