# Welcome to PIN

![](https://1925690997-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MZuNcPTcEu5hZahipkT%2F-M_hcmUP8xgy0waxNQ_S%2F-M_iEoUmwFpgSHU2sPAw%2Fwhatisbanner.svg?alt=media\&token=56dc7fdf-9c89-4667-b075-dce23d63eed2)

PIN📌is a proof-of-work cryptocurrency designed to index web3 metadata. PIN also exists as a wrapped token on [Ethereum](https://etherscan.io/token/0xc1f976b91217e240885536af8b63bc8b5269a9be), Binance Smart Chain, and Polygon.

{% hint style="success" %}
**Looking for FLO? We've re-branded to PIN:** [**FLO Rebrand and Expansion Into Web3**](https://medium.com/public-index-network/upgrading-flo-to-pin-to-build-content-rich-web3-applications-d3b679b8f6ab)
{% endhint %}

Users and developers can **"pin"** metadata, permanently and immutably storing it on the network for public use. Pins can then be retrieved and read by any PIN-based application. When combined with its supporting metadata library, the [Open Index Protocol ("OIP")](https://www.openindexprotocol.com/), **PIN provides a new standard for publishing, indexing, and monetizing any digital content.**

A robust development community is actively using PIN to create and index immutable links that will help to serve as the infrastructure for web3.

[![](https://1925690997-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MZuNcPTcEu5hZahipkT%2F-M_gtmWBHJbDUaDTt0rs%2F-M_hXze0HyMMEP3vE__t%2FBuyButton.svg?alt=media\&token=7136a491-989f-44ad-8999-928ab01b92e0)](https://docs.publicindex.network/for-users/exchanges) [![](https://1925690997-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MZuNcPTcEu5hZahipkT%2F-MaBcgACA5k92QA3dHGz%2F-MaBcoAD0wSDgb5gDj0U%2Fupgradebutton.svg?alt=media\&token=e7ff59f0-a4d3-4b55-942d-7f4e1134ef5f)](https://docs.publicindex.network/for-users/upgrade-flo-to-pin)

> "The goal of PIN is to build a worldwide database of metadata for content on the web,"
>
> — **Joseph Fiscella**, CEO of PIN Labs.

{% content-ref url="about-pin/design-philosophy" %}
[design-philosophy](https://docs.publicindex.network/about-pin/design-philosophy)
{% endcontent-ref %}

![](https://1925690997-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MZuNcPTcEu5hZahipkT%2F-M_hcmUP8xgy0waxNQ_S%2F-M_iEaA9UbvyvY9l-M65%2Fsocialmediabanner.svg?alt=media\&token=a7b3e3de-b707-4baf-88da-08e66ece9d54)

{% embed url="<https://twitter.com/pinblockchain>" %}

![Established 2013](https://1925690997-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MZuNcPTcEu5hZahipkT%2F-M_lhm0mddZvq9Xnpbho%2F-M_ltF1W37K57nC1Ubgt%2Ftitlebar.svg?alt=media\&token=c5e1ed6c-35b2-467e-8fd7-f2bae1ea4b8f)


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.publicindex.network/master.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.