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

# Credentials

> What a credential is, the credentials the Billions Wallet can hold, and what each one proves.

A credential is a signed statement about you, issued by a trusted party, such as "this person passed a face scan" or "this person holds a valid passport". The wallet stores it, encrypted, and uses it to answer requests with zero-knowledge proofs. You claim each credential once. Every later request reuses it.

## Available credentials

| Credential | What it proves | How it's claimed |
| - | - | - |
| **Proof of Uniqueness** | You are a real, unique human. One face maps to one credential. | A one-time face scan. See [Claim Proof of Uniqueness](/billions-wallet/proof-of-uniqueness). |
| **Verified Human** | Your identity is backed by a government document. Builds on Proof of Uniqueness for a higher tier of trust. | Scan an NFC passport, Aadhaar QR code, driving license or national ID. See [Claim Verified Human](/billions-wallet/verified-human). |
| **Email** | You own an email address. | An OAuth connection, in the wallet. |
| **Social accounts** | You own a Discord, X (Twitter) or Telegram account. | An OAuth connection, in the wallet. |

## Why Proof of Uniqueness matters

Airdrops, token distributions and other reward programs want rewards to reach real people. Bots and Sybil attacks, where one operator runs hundreds of accounts, exploit them. Because one face maps to exactly one Proof of Uniqueness credential, an app can check that each participant is a distinct person. The same credential is also what pairs a person with an [AI agent](/agents/introduction).

## Managing credentials

The wallet's credentials dashboard shows every credential you hold, including active, revoked and expired ones. The credential marketplace lets you claim credentials in advance, so future verifications are quicker.

## Related

* [How the Wallet Works](/billions-wallet/how-the-wallet-works): how credentials are stored and synced.
* [How Verification Works](/billions-wallet/how-verification-works): how an app asks for a credential.


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