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This document can be further followed to learn more about API interactions.\n\n**Before You Begin**\n\nTo get started with CERTInext REST APIs, you need the following:\n\n- A CERTInext account\n    \n- An API Key (Access Key) generated from within the platform\n    \n\nFor every request you have to pass an API key as authentication, which can be generated using your CERTInext account. These APIs are available to use for both partners and enterprises.\n\nAs you become familiar with CERTInext, you interact with different environments, each of which may have different sign-in URLs, API base URLs, and account credentials. To know more about Accounts and environments, please see the below table.\n\n**Accounts and environments**\n\n| **Environment** | **Sign-in URL** | **API Base URL** |\n| --- | --- | --- |\n| Sandbox | [Sandbox Sign-in URL](https://sandbox-us.certinext.io/) | [https://sandbox-us-api.certinext.io/emSignHub-API/](https://sandbox-us-api.certinext.io/emSignHub-API/) |\n| Production - India (Global) | [Sign-in URL (India)](https://in.certinext.io/) | [https://api.certinext.io/](https://api.certinext.io/) |\n| Production - US | [Sign-in URL (US)](https://us.certinext.io/) | [https://us-api.certinext.io/](https://us-api.certinext.io/) |\n\n**Go Live**\n\nOnce you have successfully tested the APIs in sandbox environment, please switch to production API URLs and proceed with Go live.\n\nBefore sending your requests to the production environment, please ensure to change the product 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