gRPC REST | ### GenerateKeywordHistoricalMetrics | |---| | `` rpc GenerateKeywordHistoricalMetrics(`https://developers.google.com/google-ads/api/reference/rpc/v26/GenerateKeywordHistoricalMetricsRequest`) returns (`https://developers.google.com/google-ads/api/reference/rpc/v26/GenerateKeywordHistoricalMetricsResponse`) `` Returns a list of keyword historical metrics. List of thrown errors: [AuthenticationError](https://developers.google.com/google-ads/api/reference/rpc/v26/AuthenticationErrorEnum.AuthenticationError) [AuthorizationError](https://developers.google.com/google-ads/api/reference/rpc/v26/AuthorizationErrorEnum.AuthorizationError) [CollectionSizeError](https://developers.google.com/google-ads/api/reference/rpc/v26/CollectionSizeErrorEnum.CollectionSizeError) [HeaderError](https://developers.google.com/google-ads/api/reference/rpc/v26/HeaderErrorEnum.HeaderError) [InternalError](https://developers.google.com/google-ads/api/reference/rpc/v26/InternalErrorEnum.InternalError) [QuotaError](https://developers.google.com/google-ads/api/reference/rpc/v26/QuotaErrorEnum.QuotaError) [RequestError](https://developers.google.com/google-ads/api/reference/rpc/v26/RequestErrorEnum.RequestError) | Authorization scopes : Requires the following OAuth scope: - `https://www.googleapis.com/auth/adwords` For more information, see the [OAuth 2.0 Overview](https://developers.google.com/identity/protocols/OAuth2).