> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://taurushq.ferndocs.com/prime/docs/messages/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://taurushq.ferndocs.com/_mcp/server.

# Messages

As defined in the FIX protocol, TDX API FIX server is using two different data levels: Session and Application.
The Session level handles the delivery of data and the Application level defines the business-related data content.
The following session and application messages are supported by TDX API FIX Engine:

* [Session messages](/prime/docs/fix-mess-session-messages)
* [Marketdata messages](/prime/docs/fix-mess-marketdata-messages)
* [Trade messages](/prime/docs/fix-mess-trade-messages)

## Docs

- [Session](https://taurushq.ferndocs.com/prime/docs/fix-mess-session-messages.md)
- [Trade](https://taurushq.ferndocs.com/prime/docs/fix-mess-trade-messages.md)
- [Marketdata](https://taurushq.ferndocs.com/prime/docs/fix-mess-marketdata-messages.md)