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

# FAQ

- [How to apply for apikey for an interface?](https://docs.multimarkets.org/faq/how-to-apply-for-apikey-for-an-interface.md)
- [What is the purpose of the public key?](https://docs.multimarkets.org/faq/what-is-the-purpose-of-the-public-key.md)
- [What is the interface request timeout?](https://docs.multimarkets.org/faq/what-is-the-interface-request-timeout.md)
- [Supported development languages?](https://docs.multimarkets.org/faq/supported-development-languages.md)
- [What are the API call restrictions?](https://docs.multimarkets.org/faq/what-are-the-api-call-restrictions.md)
- [How to use APIs more safely?](https://docs.multimarkets.org/faq/how-to-use-apis-more-safely.md)