Number of APIs: 1
GET {{url}}/services/data/v{{version}}/sobjects/:SOBJECT_API_NAME/
Creates new records or updates existing records (upserts records) based on the value of a specified external ID field. If the specified value doesn't exist, a new record is created.
If a record does exist with that value, the field values specified in the request body are updated.
If the value is not unique, the REST API returns a 300 response with the list of matching records. HEAD, GET, PATCH, DELETE, POST
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