# CitCom.ai Hub > The technical hub of the CitCom.ai TEF: data spaces, tools and guides to build AI services for smart cities. The technical hub of CitCom.ai, the EU Testing and Experimentation Facility for AI and robotics in smart cities: the CitCom.ai Data Space (FIWARE Data Space Connector, verifiable credentials, NGSI-LD, Smart Data Models), its marketplace, the guides to join it, publish and consume data and services, and the tools to connect a city platform. ## Get started - [Getting started]() - [The project and the TEFs]() - [Interoperability]() - [Data spaces in 5 minutes]() ## Data space - [The CitCom.ai Data Space]() - [How it works]() - [Marketplace]() - [Eclipse EDC data space]() ## Guides - [Guides]() - [Join the data space]() - [Get a wallet and your credentials]() - [Use data from your code]() - [Deploy your own connector]() - [Publish a dataset]() - [Publish a web service]() - [Example: MIAIS, an AI service]() - [Example: Valencia, a city platform]() ## Toolbox - [Toolbox]() - [Lepus]() - [NGSI-LD and FiLiP]() - [ds-consumer-auth]() - [Wallets]() - [Smart Data Models]() ## TEF network - [TEF network]() - [Sites in detail]() - [AI Trustworthiness Label]() - [Local Digital Twins]()