The Financial Information eXchange (FIX) Protocol is the world's leading standard for real-time electronic trading. It is maintained by the FIX Trading Community, a non-profit industry association dedicated to developing and promoting standards for automation and efficiency across financial markets.

This interactive search tool supports FIX Latest, the current and authoritative version of the FIX Protocol (including all extensions approved by the FIX Trading Community’s global technical committee). It also supports the two supported legacy versions of FIX – versions 4.2 and 4.4. If you require information on other versions of FIX, you can find this on our website at Legacy FIX Specifications.