Welcome to the Nexmo Developer Documentation. Get familiar with concepts common to Nexmo APIs and products. Then start building connected applications with Nexmo.


There are a number of shared concepts between the various Nexmo APIs:

  • Applications - Security and configuration information you need to connect to Nexmo endpoints
  • Authentication – API keys and JSON Web Tokens (JWTs)
  • Signing messages – How to cryptographically sign messages and verify signatures
  • Webhooks – Nexmo's API can send data back to your web server via a webhook
  • OpenAPI – All Nexmo APIs have OpenAPI descriptions that you can take advantage of in your own development process

You can also find definitions of commonly used terms in the Glossary.


Documentation within Nexmo Developer is organised by product. Within each product section you'll find the following types of documentation:

  • Guides - Key concepts highlighting core functionality and features
  • Code Snippets - Quick access code samples to help you construct your programmable communications apps
  • Tutorials - Step-by-step tutorials to help you build solutions to common communications use cases
  • API Reference - The resources, parameters and payload examples

Messages and Dispatch

Integrate with various communication channels including Facebook Messenger, WhatsApp and Viber with failover

Nexmo Client SDK

Build multi-platform applications with contextual communications using Nexmo Client SDK and Conversation API.