# Frequently Asked Questions

## Frequently Asked Questions

### Is the plugin free?

Yes. The plugin itself is **free and MIT licensed**. You can install and use it at no cost. API calls to ChainGPT's live services consume credits -- see the Pricing Guide for details. The mock server allows unlimited free testing.

***

### Do I need an API key?

**For live APIs:** Yes. Get your API key at [app.chaingpt.org](https://app.chaingpt.org).

**For mock server testing:** No. The mock server requires no authentication.

***

### Which Claude Code version do I need?

The latest version of Claude Code is recommended. The plugin uses standard Claude Code plugin conventions and MCP protocol, so any recent version should work.

***

### Can I use it without the MCP server?

Yes. The skills work standalone for code generation. Claude Code will read the SKILL.md and reference docs to generate integration code, templates, and configurations without needing the MCP server running. The MCP server adds the ability to make live API calls directly from Claude Code.

***

### How do I test without spending credits?

Use the mock server:

```bash
cd mock-server
npm install
npm run dev
```

Then set `CHAINGPT_BASE_URL=http://localhost:3001`. All API calls will route to the local mock server at zero cost. See the Testing Guide for full details.

***

### What blockchains are supported for NFT minting?

22+ chains are supported, including:

* Ethereum
* Polygon
* BNB Smart Chain (BSC)
* Arbitrum
* Optimism
* Avalanche
* Base
* zkSync
* Linea
* Scroll
* And more

Check the reference docs for the current full list.

***

### Is the Solidity LLM the same as the API?

No. The **Solidity LLM** is a separate open-source model hosted on HuggingFace. It runs locally and is free to use (0 credits). The **LLM Chat API** is a hosted service at api.chaingpt.org that costs 0.5-1.0 credits per request. They serve different purposes: the Solidity LLM is specialized for Solidity code generation, while the API provides general Web3/blockchain AI chat.

***

### Can I use multiple products together?

Yes. The plugin includes **composition patterns** and **multi-product templates** for combining products. Common combinations include:

* LLM Chat + Contract Generator (design then build)
* Contract Generator + Contract Auditor (build then verify)
* LLM Chat + NFT Generator (describe then create)
* News + AgenticOS (monitor then post)

See the `patterns/` directory in the plugin for ready-to-use examples.

***

### How do I report bugs?

Open an issue on the plugin's GitHub repository. Include:

* Steps to reproduce the issue
* Expected vs. actual behavior
* Claude Code version
* Whether the issue occurs with the mock server or live API

***

### Is there a grant program?

Yes. The **$1M Web3 AI Grant Program** offers:

* Up to **$20,000 in API credits**
* Up to **$10,000 USDC**

The grant supports developers building innovative Web3 AI applications with ChainGPT.

***

### What's the rate limit?

**200 requests per minute** per API key. Requests exceeding this limit receive a `429 Too Many Requests` response. If you need higher limits, contact ChainGPT support.

***

### Do credits expire?

**No.** Credits never expire. Purchase once and use them whenever you need.


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# 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.chaingpt.org/dev-docs-b2b-saas-api-and-sdk/chaingpt-claude-skill-and-plugin/resources/frequently-asked-questions.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.