Update an existing contact identified by email or phone_number.
Provide exactly one identifier, plus one or more mutable fields to change.
Mutable fields: first_name, last_name, tags, custom_fields.
The email and phone_number fields are used only as identifiers and
cannot be changed.
OAuth 2.0 access token. Include as Authorization: Bearer <token>.
Identify the contact with email or phone_number (not both), then
include one or more mutable fields to update. The email and
phone_number fields themselves are immutable and cannot be changed.
Identifies the contact to update. Cannot be changed.
"jane@example.com"
Identifies the contact to update. Cannot be changed.
"+15551234567"
Updated first name.
"Janet"
Updated last name.
"Smith"
Replaces all existing tags.
["vip", "wholesale"]Replaces all existing custom fields. Must be a flat key-value object.
{ "loyalty_tier": "platinum" }Contact updated successfully.