> ## Documentation Index
> Fetch the complete documentation index at: https://docs.prelude.so/llms.txt
> Use this file to discover all available pages before exploring further.
# Introduction to the Verify API
> Verify phone numbers and emails worldwide using the most appropriate channel depending on your user's context.
Verify is a powerful and easy-to-use API that lets you verify phone numbers and email addresses worldwide using the most appropriate method and channel depending on your user's context.
It manages the full [verification lifecycle](/verify/v2/documentation/lifecycle) for you, from initiating the verification and sending messages to performing retries, checking the validity of the code and returning the result.
Businesses typically see a 20-30% increase in conversion compared with their previous provider, while [saving 30-40%](https://docs.google.com/spreadsheets/d/1M8et9bu6eBk5nhvvg1BckJIaGi8GjnH587ooKI_YURA/) monthly.
Prelude's Verify API also **detects and [prevents fraud](/verify/v2/documentation/prevent-fraud)** using algorithms trained on tens of millions of data points.
Start a verification
2 min
Send and verify a code in a few lines.
[Get started →](/verify/v2/documentation/quickstart)
### API
The Prelude v2 API is a [REST](https://en.wikipedia.org/wiki/REST) API and uses standard
HTTP features and [statuses](https://developer.mozilla.org/en-US/docs/Web/HTTP/Status).
The current URL is `https://api.prelude.dev/v2`.
### Authentication
To perform requests on the API, you need to provide a **v2** API key in the `Authorization` header.
You can create an API key in the [Dashboard](https://app.prelude.so), under the **API Keys** section of the
settings.
```sh Example request theme={null}
curl --request POST \
--url 'https://api.prelude.dev/v2/*' \
--header 'Accept: application/json' \
--header 'Authorization: Bearer '
```
### Errors
Prelude uses conventional HTTP [statuses](https://developer.mozilla.org/en-US/docs/Web/HTTP/Status)
to indicate the success or failure of a request:
* Codes in the `2xx` range indicate success.
* Codes in the `4xx` range indicate an error that failed given the information provided (e.g. required parameter was omitted, authentication failed or a rate limit was reached).
* Codes in the `5xx` range indicate an error with Prelude's servers (these are rare).
***
The Prelude API returns errors using a JSON object in the response body with a
machine-readable `code` and a human-readable `message` and a `param` field.
See [Errors](/introduction/errors) for more details as well as a list of all possible error codes.
# API Reference
Explore the Verification API reference to learn more about the available endpoints:
Create a new verification session. If another non-expired verification
exists perform a retry instead.
Check the validity of a code.
# Backend SDKs
Integrate effortlessly with Prelude using our Backend SDKs for your platform of choice.
Learn how to integrate the Node.js SDK into your application.
Learn how to integrate the Go SDK into your application.
Learn how to integrate the Python SDK into your application.
Learn how to integrate the Kotlin/Java SDK into your application.
Learn how to integrate the Ruby SDK into your application.
Learn how to integrate the PHP SDK into your application.
Learn how to integrate the C# SDK into your application.
# Frontend SDKs
Explore how you can enhance your verification process with our [Frontend SDKs](/introduction/frontend-sdks/introduction).
Learn how to integrate the Android SDK into your application.
Learn how to integrate the iOS SDK into your application.
Learn how to integrate the Web SDK into your application.
Learn how to integrate the React Native SDK into your application.
Learn how to integrate the Flutter SDK into your application.
