> For the complete documentation index, see [llms.txt](https://docs.idlayr.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.idlayr.com/api-reference/readme-1/introduction.md).

# Introduction

The IDlayr Secure SNA API confirms that a mobile phone number is genuinely owned by the device making the request. It does so without sending an SMS, code, or any visible challenge: while the device sits on a cellular data connection, the network operator attributes the session to a phone number and the platform compares that to the number the customer is verifying.

The flow is asynchronous and customer-driven:

1. **Create** the Check with the phone number you want to verify.
2. **Redirect** the device through the verification URL. The network operator is consulted during this hop and a single-use code is returned at the end of the redirect chain.
3. **Submit** the code by `POST`ing it to the Check to complete the verification and resolve the `match`.

A webhook to `callback_url` (if you supply one) is fired when the Check reaches a terminal status.

Requests authenticate with an OAuth2 Access Token in the `Authorization` header (`Bearer {access_token}`). Tokens are created using a project's `client_id` and `client_secret`.


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