Method: entries.write

Writes log entries to Logging. This API method is the only way to send log entries to Logging. This method is used, directly or indirectly, by the Logging agent (fluentd) and all logging libraries configured to use Logging. A single request may contain log entries for a maximum of 1000 different resource names (projects, organizations, billing accounts or folders), where the resource name for a log entry is determined from itslogName field.

HTTP request

POST https://logging.googleapis.com/v2/entries:write

The URL usesgRPC Transcoding syntax.

Request body

The request body contains data with the following structure:

JSON representation
{"logName":string,"resource":{object (MonitoredResource)},"labels":{string:string,...},"entries":[{object (LogEntry)}],"partialSuccess":boolean,"dryRun":boolean}
Fields
logName

string

Optional. A default log resource name that is assigned to all log entries inentries that do not specify a value forlogName:

  • projects/[PROJECT_ID]/logs/[LOG_ID]
  • organizations/[ORGANIZATION_ID]/logs/[LOG_ID]
  • billingAccounts/[BILLING_ACCOUNT_ID]/logs/[LOG_ID]
  • folders/[FOLDER_ID]/logs/[LOG_ID]

[LOG_ID] must be URL-encoded. For example:

"projects/my-project-id/logs/syslog""organizations/123/logs/cloudaudit.googleapis.com%2Factivity"

The permissionlogging.logEntries.create is needed on each project, organization, billing account, or folder that is receiving new log entries, whether the resource is specified inlogName or in an individual log entry.

Authorization requires the followingIAM permission on the specified resourcelogName:

  • logging.logEntries.create
resource

object (MonitoredResource)

Optional. A default monitored resource object that is assigned to all log entries inentries that do not specify a value forresource. Example:

{ "type": "gce_instance",  "labels": {    "zone": "us-central1-a", "instanceId": "00000000000000000000" }}

SeeLogEntry.

labels

map (key: string, value: string)

Optional. Default labels that are added to thelabels field of all log entries inentries. If a log entry already has a label with the same key as a label in this parameter, then the log entry's label is not changed. SeeLogEntry.

entries[]

object (LogEntry)

Required. The log entries to send to Logging. The order of log entries in this list does not matter. Values supplied in this method'slogName,resource, andlabels fields are copied into those log entries in this list that do not include values for their corresponding fields. For more information, see theLogEntry type.

If thetimestamp orinsertId fields are missing in log entries, then this method supplies the current time or a unique identifier, respectively. The supplied values are chosen so that, among the log entries that did not supply their own values, the entries earlier in the list will sort before the entries later in the list. See theentries.list method.

Log entries with timestamps that are more than thelogs retention period in the past or more than 24 hours in the future will not be available when callingentries.list. However, those log entries can still beexported with LogSinks.

To improve throughput and to avoid exceeding thequota limit for calls toentries.write, you should try to include several log entries in this list, rather than calling this method for each individual log entry.

Authorization requires the followingIAM permission on the specified resourceentries:

  • logging.logEntries.create
partialSuccess

boolean

Optional. Whether a batch's valid entries should be written even if some other entry failed due to a permanent error such as INVALID_ARGUMENT or PERMISSION_DENIED. If any entry failed, then the response status is the response status of one of the failed entries. The response will include error details inWriteLogEntriesPartialErrors.log_entry_errors keyed by the entries' zero-based index in theentries. Failed requests for which no entries are written will not include per-entry errors.

dryRun

boolean

Optional. If true, the request should expect normal response, but the entries won't be persisted nor exported. Useful for checking whether the logging API endpoints are working properly before sending valuable data.

Response body

If successful, the response body is empty.

Authorization scopes

Requires one of the following OAuth scopes:

  • https://www.googleapis.com/auth/logging.write
  • https://www.googleapis.com/auth/logging.admin
  • https://www.googleapis.com/auth/cloud-platform

For more information, see theAuthentication Overview.

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Last updated 2025-07-21 UTC.