# General Information

ZapSign is an electronic document signing platform that ensures authenticity, integrity, and non-repudiation. All signatures made through ZapSign are legally valid in their respective jurisdictions. The signature is legally valid in the US, EU, Latin America, with few exceptions. [Click here](https://zapsign.co/legality-guide) to learn about the legal validity of signatures in each country

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If you haven’t yet integrated with ZapSign, we recommend starting with the testing environment (sandbox) by [clicking here](https://sandbox.app.zapsign.com.br/acesso/entrar) to avoid charges.
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### API Implementation Essentials

<table data-view="cards"><thead><tr><th></th><th></th><th data-type="files"></th><th></th><th data-type="files"></th><th data-hidden data-card-cover data-type="files"></th></tr></thead><tbody><tr><td><strong>We work with a REST API</strong> that uses GET and POST methods. All data is read in JSON, and our responses are also in JSON.</td><td></td><td></td><td></td><td></td><td><a href="https://1401277393-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M4noMoX5ZGb2-RhWjjf-1703796690%2Fuploads%2FjqDj81zbaJgCzgJmJd6d%2FEbook%20marketing%20digital%20moderno%20azul%20cinza%20capa%20para%20ebook.png?alt=media&#x26;token=35afc80e-5005-4fde-b028-75960018301b">Ebook marketing digital moderno azul cinza capa para ebook.png</a></td></tr><tr><td><strong>Null Strings:</strong> Our API does not accept strings defined as null. If a field is defined as a string, do not send it as null. If you want the field to be empty, send it as an empty string ("") or simply omit it from your request.</td><td></td><td></td><td></td><td></td><td><a href="https://1401277393-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M4noMoX5ZGb2-RhWjjf-1703796690%2Fuploads%2FjqDj81zbaJgCzgJmJd6d%2FEbook%20marketing%20digital%20moderno%20azul%20cinza%20capa%20para%20ebook.png?alt=media&#x26;token=35afc80e-5005-4fde-b028-75960018301b">Ebook marketing digital moderno azul cinza capa para ebook.png</a></td></tr><tr><td><strong>Booleans vs. Strings:</strong> <code>true</code> and <code>false</code> (booleans) are not equivalent to <code>"true"</code> and <code>"false"</code> (strings). Be sure to use the correct type to avoid test failures.</td><td></td><td></td><td></td><td></td><td><a href="https://1401277393-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M4noMoX5ZGb2-RhWjjf-1703796690%2Fuploads%2FjqDj81zbaJgCzgJmJd6d%2FEbook%20marketing%20digital%20moderno%20azul%20cinza%20capa%20para%20ebook.png?alt=media&#x26;token=35afc80e-5005-4fde-b028-75960018301b">Ebook marketing digital moderno azul cinza capa para ebook.png</a></td></tr></tbody></table>

***

**Time Management**

* **UTC+0 Time Zone:** Our server stores dates and times in the UTC+0 time zone. Most frameworks and browsers automatically perform this conversion when dealing with datetime objects.

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For any questions, please contact our support team via [WhatsApp](https://api.whatsapp.com/send?phone=551140401991\&text=Hi,%20I%20would%20like%20to%20speak%20to%20support) or by email at <support@zapsign.com.br>. You can also [speak with our specialists](https://zapsign.co/contact-sales?hsCtaTracking=f29cb894-a383-4ae5-ad40-8567b0f3257e%7C29b2d094-e9d4-4165-b8f3-5c9c26eae155) for customized solutions.
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### Chat with Gepeto!

Have any questions? Use our artificial intelligence trained with all the API documentation. =)

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