> ## Documentation Index > Fetch the complete documentation index at: https://developers.gonitro.com/docs/llms.txt > Use this file to discover all available pages before exploring further. # Access the Nitro APIs > Access Nitro's REST APIs for PDF automation and eSignature workflows — conversions, extractions, redactions, transformations, and document signing. Nitro provides public REST APIs for PDF automation and document signing. The **PDF Services API** covers tasks such as conversions, extractions, redactions, and a number of transformations, and the **Sign API** powers signature workflows. The application uses access token authentication and includes health monitoring features built for enterprise-scale document management. ## Access the Nitro PDF Services API Nitro’s PDF Services API allow you to automate common document tasks such as conversion, extraction, redaction, and transformation directly within your workflows. Get early access by filling out [a short form](https://www.gonitro.com/contact-sales/early-access-automate). ## Access the Nitro Sign API To access the Nitro Sign API, you need a Nitro Sign Enterprise account. Currently, you can obtain one by contacting our Sales team [here](https://www.gonitro.com/contact-sales/sign-enterprise) ## Get to know Nitro Sign We recommend going to the [Nitro Dashboard](http://cloud.gonitro.com/) and running a signature flow in the Nitro Sign UI. Upload a document and send it for signing. Going through the process manually will provide helpful context for the Nitro platform and serve as a good first step before learning the details of the Nitro Sign API. Nitro Dashboard