> ## Documentation Index
> Fetch the complete documentation index at: https://docs.slm.m1amdocs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Subscribe Programming Guide Preface

Subscribe is an on-demand solution for recurring and one-time billing, available for integration with your application through an object-oriented application programming interface (API), based on the Simple Object Application Protocol (SOAP). This manual, the **Subscribe Programming Guide**, leads you through the process of integrating your application with the Subscribe services offered by Vindicia.

Vindicia’s Subscribe API allows you to both integrate with Subscribe, and take advantage of Vindicia’s ChargeGuard protection services.

For more information about the mapping between Vindicia Subscribe SOAP API and REST API operations see the [SOAP-to-REST API Parity Guide](https://docs.vindicia.com/bundle/subscribeAPIParityGuide/page/topics/SOAPToRESTAPIParityGuide.html).


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