# Introduction

These docs are a comprehensive guide to the [88mph protocol v4](https://88mph.app/), to help end-users and developers.

The protocol codebase is open-sourced and hosted on [Github](https://github.com/88mphapp). It's maintained by 88mph contributors and the [community](https://docs.88mph.app/grants-funding). It has been fully audited several times by [security audits firms](https://docs.88mph.app/developer-docs/security). In parallel, 88mph maintains a [bug bounty program](https://immunefi.com/bounty/88mphv3/).

Please don't hesitate to ask on our social media channels if you can't find what you are looking for here:

[Twitter](https://twitter.com/88mphapp) | [Discord](https://discord.gg/95pw2uQ7PE) | [Telegram](https://t.me/join_88mphapp)

88mph is continuously iterating on the best way to operate a non-custodial, fully on-chain fixed yield rate protocol, don't hesitate to send us your direct and honest feedback [here](https://forms.gle/UqKQ1LqhwAFCBWGBA).

## 88mph products

88mph offers two non-custodial on-chain products:

1. A [fixed-term fixed-rate yield product](https://docs.88mph.app/getting-started/fixed-apy) acting as an intermediary between you and third-party variable yield rate lending protocols to offer the best fixed yield rate on your capital, with a custom maturity up to 1 year.
2. A yield speculation instrument, called [Yield Tokens](https://docs.88mph.app/getting-started/yield-tokens) (YTs),  allowing users to speculate on the variable yield rate of third-party protocols such as Compound or Aave.

By using the fixed rate pools, users receive[ MPH tokens](https://docs.88mph.app/broken-reference) that can be used to obtain [veMPH tokens](https://docs.88mph.app/vemph-gauges/vemph) to earn protocol revenues and exercise voting rights.