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Usage Center⚓︎

The Usage Center provides visibility into publishing activity across your organization and its namespaces. It allows users to review aggregate usage metrics for the selected organization, view namespace-level usage details based on their access permissions, and export namespace usage data.

You can access the Maven Central Usage Center at https://central.sonatype.com/publishing/usage. At the top of the page, select an organization from the drop-down menu. All usage data displayed on the page is scoped to the currently selected organization.

Publishing Limits for Free Maven Central Users⚓︎

Maven Central includes monthly publishing limits for Free users to ensure sustainable infrastructure for the Java ecosystem. These limits apply at the organization level. Organizations may include one or more namespaces.

For complete details, see the Publishing Limits help documentation.

Note

If you notice discrepancies in how your namespaces are organized, contact central-support@sonatype.com.

The following table provides details about specific metrics and their monthly limits for free Maven Central users.

Metric Limit
File Count 300 files/month
Release Size 15 MB/month
Release Count 3 releases/month

Tip

For organizations whose publishing activity exceeds the free limits, Maven Central Pro provides a paid solution with increased usage allowances and direct access to Sonatype support. Learn more about Maven Central Pro and evaluate if it is the right option for your organization.

Maven Central Usage Overview⚓︎

The Usage Overview section of the Usage Center displays organization-level metrics for the current month aggregated across all namespaces.

Metric Cards⚓︎

Three metric cards show your current usage with visual progress indicators:

Card Description
Total Release Size Total size of all files published
File Count Total number of files published across all releases
Release Count Total number of release events recorded

Each card displays:

  • Current usage value
  • Progress bar showing usage relative to limits
  • Color-coded status: green when within limits; yellow at 75% to indicate approaching capacity; red at 90% to signal a critical threshold.

Select the View Trends button on any metric card to view historical trends for the last three months, including applicable usage limits. This helps publishers monitor consumption patterns and track usage against configured thresholds over time.

Note

Limits are enforced based on usage during the current calendar month. Historical periods are provided for trend analysis only.

Maven Central Usage by Namespace⚓︎

The namespace table shows detailed metrics for each namespace to which you have access. You will only see namespaces for which you have been granted access within the selected organization.

The following information is available in the namespace table:

Table Column Description
Namespace The group ID / namespace identifier
Release Size Total size of files published for this namespace
File Count Number of files published
Release Count Number of release events

You can also perform the following actions from this view:

  • Search – Filter namespaces by name pattern
  • Sort – Click column headers to sort ascending or descending
  • Export CSV – Download usage data for offline analysis

Metric Definitions⚓︎

Sonatype defines available metrics as follows:

Metric Definition
Release Count The total number of release events recorded during the selected time period. A release event is a distinct publish operation to Maven Central.
File Count The total number of files published across all releases during the selected time period. Each artifact file (JAR, POM, source JAR, javadoc JAR, etc.) counts as one file.
Release Size The total size of all files published during the selected time period, measured in bytes.