​Client Order ID

Client order ID is a client-supplied order identifier that Gemini will echo back to you in all subsequent messages about that order.

Although this identifier is optional, Gemini strongly recommends supplying client_order_id when placing orders using the Create New Order endpoint.

This makes it easy to track the Order Events: Accepted and Order Events: Booked responses in your Order Events WebSocket subscription.

​Visibility

Your client order ids are only visible to the Gemini exchange and you. They are never visible on any public API endpoints.

​Uniqueness

Gemini recommends that your client order IDs should be unique per trading session.

​Allowed characters

Your client order ids should match against this PCRE regular expression: [:\-_\.#a-zA-Z0-9]{1,36}.

Characters	Description	ASCII Codes (Dec)
A-Z	Uppercase A-Z	65 - 90
a-z	Lowercase a-z	97 - 122
0-9	Digits	48 - 57
#	Hash, octothorpe, number sign	35
-	Hyphen	45
.	Period	46
:	Colon	58
_	Underscore	95

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