1. A computer program product for normalizing confidence score thresholds, comprising: one or more computer-readable storage media and program instructions stored on the one or more computer-readable storage media, the program instructions comprising: program instructions to receive by a first hub of a plurality of hubs of a federated environment, a first search query from a calling application; program instructions to generate by the first hub, a first confidence score for a result of the first search query; program instructions to calculate a normalized confidence score threshold for a second hub of the plurality of hubs of the federated environment by applying a first normalization factor associated with the second hub to the first confidence score; program instructions to transmit from the first hub to the second hub, a second search query with the normalized confidence score threshold calculated for the second hub; and program instructions to receive by the first hub from the second hub, one or more results of the second search query that satisfy the normalized confidence score threshold calculated for the second hub.