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

# Build with Self

Self is a leading digital identity infrastructure for Web2 and Web3. Self leverages zero-knowledge cryptography to disclose verifiable credentials without revealing any sensitive information. No third parties. No data leaks.

<Info>
  Self is the only leader in the space that is production-ready, live across iOS and Google Play Store, and fully audited by third-party zkSecurity that doesn’t rely on additional dependencies such as biometric hardware.
</Info>

By the conclusion of this guide, you will have a comprehensive understanding of Self and how to integrate it into your Celo applications.

This document will cover:

* What is Self?
* Getting Started
* New Features (2025)
* Technical Resources
* Use Cases

## What is Self?

[Self](https://self.xyz/) is a privacy-first, open-source identity protocol that uses zero-knowledge proofs for secure identity verification.

It enables Sybil resistance and selective disclosure using real-world attestations like passports, EU ID cards, and Indian Aadhaar. With a few lines of code, developers can easily check if their users are humans, while preserving their privacy.

### How It Works

Self Protocol simplifies digital identity verification with zero-knowledge proofs in three steps:

1. **Scan Your Identity Document**: Users scan their passport, EU ID card, or Aadhaar using the NFC reader of their phone.
2. **Generate a Proof**: Generate a zk proof over the identity document, selecting only what you want to disclose.
3. **Share Your Proof**: Share the zk proof with the selected application.

## Use cases

Seamlessly and securely verify your digital identity with Self. It allows you to:

* **Prove Your Humanity:** Confirm you are human without revealing personal information.
  * Airdrop Protection
  * Social Media & Marketplaces (add trust to user profiles)
  * Quadratic Funding
  * Sybil-Resistant Polling
* **Prove Identity, Age, Nationality:** Demonstrate where you're from while maintaining privacy. Securely capture the first page data and RFID from your passport to verify your identity.
  * Sanction List Checking
  * Age Verification
  * Wallet Recovery
* **Privacy-preserving Technology:** Protect your users' private information. They will only disclose credentials and information that they allow.
* **Streamline Verification:** Enjoy a smooth and efficient identity verification process.
* **Optimized for Web3 and Universal Apps:** Harness zero-knowledge proofs and one-tap verifications in Web3 apps.

## New Features (2025)

### Expanded Identity Document Support

Self now supports:

* **EU Biometric ID Cards**: Scan NFC-enabled EU IDs covering 27 countries
* **Indian Aadhaar**: Support for Aadhaar verification
* **Passports**: Continued support for passport verification

All verification leverages zero-knowledge proofs (ZKPs) and no data leaves the user's device.

### Points/Rewards System

Self has introduced a points program that incentivizes consistent, secure use:

* Users earn points for setting up Self Pass
* Points earned for continued use across partner platforms
* Points can be redeemed for rewards
* Designed to drive engagement and validate active, verified users

### Major Integrations

* **Google Cloud**: Integrated Self's SDK and ZKP-based proof-of-humanity in its Web3 Portal
* **Aave**: DeFi protocol integration enabling compliance checks, sybil-resistant airdrops, and age/country-gated services
* **Celo Blockchain**: On-chain attestations leverage the Celo blockchain for transparency and auditability

## Technical Resources

* [Self Website](https://self.xyz/)
* [Self Documentation](https://docs.self.xyz/)
* [Self Playground](https://playground.self.xyz/)
* [Self Staging Playground](https://playground.staging.self.xyz/)
* [Self Quickstart Guide](https://docs.self.xyz/docs/self-pass/quickstart)
* [Contract Integration Guide](https://docs.self.xyz/docs/self-pass/contracts/basic-integration)
* [Backend Integration Guide](https://docs.self.xyz/docs/self-pass/backend/basic-integration)
* [QRCode SDK Documentation](https://docs.self.xyz/docs/self-pass/frontend/qrcode-sdk)
* [Deployed Contracts](https://docs.self.xyz/docs/self-pass/contracts/deployed-contracts)

## Support

Join the [Self Builder Group](https://t.me/selfprotocolbuilder) on Telegram for community support and updates.

For Celo-specific integrations, visit the [Celo Discord](https://discord.com/invite/celo) and ask in the #build-with-celo channel.