> For the complete Linea documentation index, see [llms.txt](/llms.txt). > Agents can fetch this page as Markdown at [https://docs.linea.build/network/build/tools/cross-chain/ccip.md](https://docs.linea.build/network/build/tools/cross-chain/ccip.md). # Chainlink Cross-Chain Interoperability Protocol (CCIP) Chainlink CCIP is a blockchain interoperability protocol that enables developers to build secure applications that can transfer tokens, messages (data), or both tokens and messages across chains. CCIP enables three main actions: - **Arbitrary messaging**: Send arbitrary data (encoded as bytes) to a receiving smart contract on a different chain. - **Token transfers**: Transfer tokens to a smart contract or an externally owned account (EOA). - **Programmable token transfers**: Simultaneously transfer tokens and arbitrary data in a single transaction. To use CCIP services, you need to have LINK available to pay node operators, a cost referred to as CCIP fees. [See the token contracts for LINK on Linea](https://docs.chain.link/resources/link-token-contracts#linea). ## Resources - [CCIP documentation](https://docs.chain.link/ccip) - [Linea CCIP directory](https://docs.chain.link/ccip/directory/mainnet/chain/ethereum-mainnet-linea-1) - [LINK token contracts on Linea](https://docs.chain.link/resources/link-token-contracts#linea) - [Chainlink Builder's Quick Links](https://docs.chain.link/builders-quick-links), showing all Chainlink services available on Linea