# Partnerships & Security POWERCITY partnered with experienced cross-chain platforms to provide superior user experience, reliability and security: * Experienced bridge and routing providers use well-established procedures to secure the bridging components and are already battle-tested and audited. * Optimized routing across multiple bridges and exchanges ### Rubic PortalX is built on top of the Rubic Cross-Chain Aggregator SDK, a smart-routing service that connects many bridges and decentralized exchanges. A high level of security is one of Rubic’s top priorities: * The integration of multiple bridges and DEXs allows Rubic to **switch off the provider that gets out of operation**, and redirect the user to a different, working one. * Rubic has a large infrastructure, team, and developer support, which allows for elaborating on more innovative measures to ensure the safety of swaps. PortalX never keeps users' funds on its frontend, every transaction is performed via the Rubic API by sending calls to other smart contracts. Read more about Rubic's approach to security [here](https://docs.rubic.finance/rubic/security). --- # 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.powercity.io/portalx/partnerships-and-security.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.