Vonage APIs

Authentication

Requests are authenticated with an API key. Keep keys on the server side (for example in a serverless function) and never ship them in front-end code or public repositories.

Pricing model

This is a paid API, usually billed per request or by usage. Some providers offer trial credits or test modes for development. Prices change often, so check the provider's pricing page before you commit, and model your bill at 10× today's volume.

Before you integrate

• Read the terms on caching, storing and displaying data.
• Note the rate limits and the error format so you can retry with backoff.
• Wrap calls behind your own interface so you can switch providers later.
• Pin an API version if the provider offers versioning, and watch its changelog.

Alternatives to Vonage APIs