> ## Documentation Index
> Fetch the complete documentation index at: https://tfh-takis-document-selfie-check-4.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Understanding when to use World ID

World ID is a privacy-preserving trust layer for companies that need to know whether a real, unique, present, or eligible human is behind an action.

## Example scenarios

<CardGroup cols={2}>
  <Card title="Stop bots and duplicate accounts" href="/world-id/idkit/integrate">
    Enforce one-person, one-action on rewards, referrals, voting, reviews,
    promotions, and social participation.

    **Integrate Proof of Human**
  </Card>

  <Card title="Protect sensitive moments" href="/world-id/credentials/11">
    Require human presence when someone approves a payment, recovers an account,
    deploys software, or authorizes a high-risk transaction.

    **Add Selfie Check**
  </Card>

  <Card title="Check eligibility privately" href="/world-id/idkit/credentials#identity-check-preview">
    Confirm someone meets a policy without asking your product to store their
    full identity documents.

    **Explore Identity Check**
  </Card>

  <Card title="Build safer AI products" href="/agents/agent-kit/integrate">
    Distinguish people from agents, and make human approval an explicit boundary
    for consequential actions.

    **Integrate AgentKit**
  </Card>

  <Card title="Make communities more accountable" href="/world-id/idkit/integrate">
    Reduce impersonation, fake accounts, reputation manipulation, and fraudulent
    content while preserving privacy.

    **Integrate Proof of Human**
  </Card>
</CardGroup>

## Where it fits in YC startups (based on Fall 2026 RFS guidelines)

| If you're building...                      | The simplest place to use World ID                                                                 |
| ------------------------------------------ | -------------------------------------------------------------------------------------------------- |
| Proving you're human                       | Require one human per account to reduce Sybil attacks.                                             |
| An AI consumer product                     | Protect a free trial, referral, reward, or limited promotion from duplicate claims.                |
| Multiplayer AI                             | Distinguish verified people from AI agents in a shared environment.                                |
| An operating system for the physical world | Make sure tasks are assigned to real, unique workers.                                              |
| A real-world data product                  | Limit data contribution and rewards to one unique contributor.                                     |
| AI-native compliance                       | Add a privacy-preserving proof that a user is a real human before a regulated or high-risk action. |
| Crypto or stablecoins                      | Run fair allocations, grants, governance, airdrops, or incentives.                                 |
| Cloud tools for small software             | Reduce fake workspaces, spam, and abuse before privileged access.                                  |
| Education                                  | Protect scholarships, subsidized access, rewards, and student benefits.                            |
| Products for the aging population          | Protect patients, family members, and caregivers from impersonation.                               |
| Self-maintaining APIs                      | Add human accountability before critical code changes, merges, or deployments.                     |
| Defense or physical infrastructure         | Add a human trust signal to safety-critical operations.                                            |

## Ready to build?

[Start integrating World ID](/world-id/idkit/integrate) to bring trust to your product.