> For the complete documentation index, see [llms.txt](https://docs.secured.finance/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.secured.finance/developer-portal/introduction.md).

# Introduction

Welcome to the Secured Finance Developer Portal, your comprehensive resource for building on top of Secured Finance's protocols. Whether you're a hackathon participant, a web2 developer exploring blockchain development, or a seasoned web3 developer, this portal provides the tools, documentation, and examples to help you integrate with our ecosystem.

## What You'll Learn

* How to query Secured Finance protocol data using our subgraphs
* How to integrate with USDFC and Fixed-Rate Lending protocols using our SDKs
* Best practices for building applications on top of Secured Finance
* How to participate in our Bug Bounty program

## Key Components

### API Reference

Our API Reference provides comprehensive documentation for querying data from our protocols using GraphQL through The Graph's subgraphs:

* [Fixed-Rate Lending Subgraph](/developer-portal/api-reference/fixed-rate-lending-subgraph.md) - Query data from the Fixed-Rate Lending protocol

> **Note:** The USDFC Subgraph is currently under development and not yet deployed. USDFC data is only available through the [USDFC SDK](/developer-portal/sdk-reference/usdfc-sdk.md).

### SDK Reference

Our SDK Reference provides detailed documentation for interacting with our protocols programmatically:

* [USDFC SDK](/developer-portal/sdk-reference/usdfc-sdk.md) - Integrate with the USDFC stablecoin protocol
* [Fixed-Rate Lending SDK](/developer-portal/sdk-reference/fixed-rate-lending-sdk.md) - Integrate with the Fixed-Rate Lending protocol

### Bug Bounty

We maintain an active [Bug Bounty](/developer-portal/bug-bounty.md) program to incentivize security researchers to help us identify and fix vulnerabilities in our protocols.

## Getting Started

If you're new to web3 development, we recommend starting with our [DeFi Starter Guide](/introduction/defi-starter-guide.md) to familiarize yourself with fundamental concepts.

For experienced developers, you can dive directly into our API and SDK references to start building applications on top of our protocols.

## Related Resources

* [USDFC Stablecoin Documentation](/usdfc-stablecoin/overview.md)
* [Fixed-Rate Lending Documentation](/fixed-rate-lending/overview.md)
* [GitHub Repositories](https://github.com/Secured-Finance)