API Reference

Logon <A>

The Logon <A> message authenticates a user and starts a session. It must be the first message sent by any application requesting to initiate a FIX session. A message of the same type will be sent to acknowledge the logon.

Tag

Field Name

Data Type

Req’d

Comments

Standard header

Y

MsgType 35=A

98

EncryptMethod

int

Y

Method of encryption. Valid values:

0 - None / other

108

HeartBtInt

int

Y

Heartbeat interval (seconds).

141

ResetSeqNumFlag

boolean

N

Indicates that both sides of the FIX session should reset sequence numbers. Valid Values:

Y - Yes, reset sequence numbers
N - No (default)

553

Username

string

Y

UserId (provided during onboarding)

554

Password

string

Y

Password (provided during onboarding)

Standard trailer

Y