# FAQs on supply

Q. **How does Hashstack calculate interest rates?**

Hashstack uses asset utilization ratio to calculate the APRs for both liquidity providers and borrowers. To know more about our interest rate model, click [here](https://docs.hashstack.finance/hub/concepts/interest-rate-model). The interest rates also rely on DIAL (Dynamic Interest algorithm). Learn more about DIAL in [this](https://blog.hashstack.finance/deconstructing-hashstacks-dynamic-interest-algorithm-dial/) article.

Q. **What tokens can I supply?**

You can supply wBTC/wETH/USDC/USDT/DAI in Hashstack's primary markets.

**Q. Why am I not able to supply more than 100 USDT?**

The version of mainnet is deployed on Cairo 0.10 and is heavily restrictive in its capabilities so as to avoid congesting the Starknet network, or pass-on adverse liquidity risks onto you.

Here are the supply and borrow limitations:

<figure><img src="/files/XBIRypZsAi1BQptBpiiU" alt=""><figcaption></figcaption></figure>

**Q. What is MCP?**

MCP stands for Minimum Commitment Period. It is the lock-in period for the liquidity providers who supply tokens to the platform. You cannot withdraw before the MCP ends.


---

# 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.hashstack.finance/mainnet-guide/supply/faqs-on-supply.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.