Authentication

OAuth 2.0 Authentication

360X FIX API uses OAuth 2.0 client credentials for authentication. Authentication occurs during the initial Logon (MsgType=A) message.

Authentication Flow

Logon Message (35=A)

Purpose:
The Logon message initiates a FIX session and authenticates the client using OAuth 2.0 credentials. It must be the first message sent after establishing a TCP connection.

When to Use:

Immediately after TCP connection is established

After any disconnection to re-establish the session

At the start of each trading day (if configured for daily sessions)

Business Context:
Authentication is the gateway to all trading operations. The Logon message includes OAuth credentials (client_id and client_secret) which are validated against the 360X authentication service. Upon successful authentication, the session becomes active and ready for business messages.

Logon Tags

Tag	Name	Required	Description	Example
98	EncryptMethod	Y	0 = None	`0`
108	HeartBtInt	Y	Heartbeat interval (seconds)	`30`
553	Username	Y	OAuth `client_id`	`my_client_id`
554	Password	Y	OAuth `client_secret`	`my_secret_key`

Example Logon Message

8=FIXT.1.1|9=XXX|35=A|49=CLIENT01|56=360X|34=1|52=20260309-14:30:00|
553=your_client_id|554=your_client_secret|
98=0|108=30|
10=XXX|

Logon Response

Success: Server responds with Logon Accept (35=A)

8=FIXT.1.1|9=XXX|35=A|49=360X|56=CLIENT01|34=1|52=20260309-14:30:01|
98=0|108=30|
10=XXX|

Failure: Server responds with Logout (35=5) and terminates connection

8=FIXT.1.1|9=XXX|35=5|49=360X|56=CLIENT01|34=1|52=20260309-14:30:01|
58=client_id and/or client_secret is wrong or missing|
10=XXX|

Authentication Errors

Error Type	Text (Tag 58)	Cause
Invalid Credentials	`client_id and/or client_secret is wrong or missing`	Incorrect OAuth credentials
System Error	`Something went wrong. Try again later`	Backend authentication service unavailable

Obtaining Credentials

OAuth credentials (client_id and client_secret) are provided by 360X upon account setup. Contact your 360X account representative to request credentials.

OAuth 2.0 Authentication#

Authentication Flow#

Logon Message (35=A)#

Logon Tags#

Example Logon Message#

Logon Response#

Authentication Errors#

Obtaining Credentials#