# Claims Data Exchange (HCX) Protocol

This section defines the following key building blocks of the data exchange protocol:

1. Message Flows: Details of various message flows and steps involved
2. Message Structure: Components of the protocol messages and their details
3. API structure: Details of the protocol APIs that facilitate the exchange
4. Error handling: Types of protocol errors, list of error codes and their descriptions

Following sub-section provides details of the various data exchange scenarios, workflows, and stakeholders involved in each exchange.