> For the complete documentation index, see [llms.txt](https://docs.emudhradigital.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.emudhradigital.com/documentation/support-and-reference/regulatory-sources.md).

# Regulatory Sources

Primary documents published by the Controller of Certifying Authorities (CCA) at [cca.gov.in/eSign.html](https://cca.gov.in/eSign.html).

## Guidelines

| Document                                     | Link                                                                                  |
| -------------------------------------------- | ------------------------------------------------------------------------------------- |
| e-Authentication Guidelines for eSign (v1.9) | [CCA-EAUTH.pdf](https://cca.gov.in/sites/files/pdf/esign/CCA-EAUTH.pdf)               |
| On-Boarding Guidelines (ASP)                 | [CCA-ASP.pdf](https://cca.gov.in/sites/files/pdf/esign/CCA-ASP.pdf)                   |
| ESP Empanelment                              | [CCA-ESP.pdf](https://cca.gov.in/sites/files/pdf/esign/CCA-ESP.pdf)                   |
| Sample ASP–ESP Agreement                     | [CCA-ASP-ESP-AGMT.pdf](https://cca.gov.in/sites/files/pdf/esign/CCA-ASP-ESP-AGMT.pdf) |
| Subscriber Agreement                         | [CCA-SUBAGRMT.pdf](https://cca.gov.in/sites/files/pdf/esign/CCA-SUBAGRMT.pdf)         |
| eSign FAQ                                    | [ESIGNFAQ.pdf](https://cca.gov.in/sites/files/pdf/esign/ESIGNFAQ.pdf)                 |
| Gazette Notification                         | [eSign gazette notification](https://cca.gov.in/eSign_gazette_notification.html)      |

## API specifications

| Specification                         | Version | Released    | Link                                                                            |
| ------------------------------------- | ------- | ----------- | ------------------------------------------------------------------------------- |
| eSign API (Online Aadhaar & Others)   | 2.1     | 07 Feb 2023 | [eSign-APIv2.1.pdf](https://cca.gov.in/sites/files/pdf/ACT/eSign-APIv2.1.pdf)   |
| eSign API (Online Aadhaar & Others)   | 2.0     | 28 Apr 2017 | [eSign-APIv2.0.pdf](https://cca.gov.in/sites/files/pdf/ACT/eSign-APIv2.0.pdf)   |
| eSign API (CA eKYC Account)           | 3.3     | 09 Dec 2020 | [eSign-APIv3.3.pdf](https://cca.gov.in/sites/files/pdf/esign/eSign-APIv3.3.pdf) |
| eSign API (CA eKYC Account)           | 3.2     | 05 Sep 2019 | [eSign-APIv3.2.pdf](https://cca.gov.in/sites/files/pdf/esign/eSign-APIv3.2.pdf) |
| eSign Remote API (Remote Key Storage) | 1.1     | 09 Sep 2026 | [eSignR-APIv1.1.pdf](https://cca.gov.in/sites/files/pdf/ACT/eSignR-APIv1.1.pdf) |
| eSign Remote API (Remote Key Storage) | 1.0     | 27 Jan 2021 | [eSignR-APIv1.0.pdf](https://cca.gov.in/sites/files/pdf/ACT/eSignR-APIv1.0.pdf) |

API listing: [cca.gov.in/eSignAPI.html](https://cca.gov.in/eSignAPI.html)