# Introduction ## **What is the 0x Cross Chain API?** The 0x Cross Chain API is a fast, flexible API that lets developers programatically access tokens across various blockchains, enabling cross-chain swap functionality in any app or wallet. It's designed to provide the same powerful aggregation and transaction-building features that 0x offers for same-chain swaps — now available across EVM and Solana chains. Whether you're building a new application, or expanding the offering of your existing product, this API helps you integrate cross-chain token swaps with minimal overhead and maximum efficiency. --- # 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://0x-docs.gitbook.io/0x-cross-chain-api-beta/introduction.md?ask= ``` 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.