# Substrate Independent Chain [Substrate](https://substrate.io/)-based blockchain networks have the choice of either operating as a solo chain, a solo chain with a bridge, or to integrate as a parachain. Integrating as a parachain enables independent Substrate-based blockchains to gain interoperability with the other independent blockchains. The secret sauce of parachain interoperability lies in XCMP (Cross-Chain Message Passing). XCMP enables parachains to share trusted logic, for example, transferring tokens between networks, without any additional trust assumptions! ## Demo chain TBD --- # 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.wetez.io/wetez/developer/appchain/substrate-independent-chain.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.