> ## Documentation Index > Fetch the complete documentation index at: https://docs.coralogix.com/llms.txt > Use this file to discover all available pages before exploring further. # List E2M Labels Cardinality > Returns cardinality information for events-to-metrics labels. ## OpenAPI ````yaml openapi_v5.yaml get /events2metrics/labels/v2/cardinalities openapi: 3.0.0 info: title: '' version: 1.0.0 servers: - url: https://api.coralogix.com/mgmt/openapi/5 - url: https://api.eu2.coralogix.com/mgmt/openapi/5 - url: https://api.coralogix.us/mgmt/openapi/5 - url: https://api.cx498.coralogix.com/mgmt/openapi/5 - url: https://api.coralogix.in/mgmt/openapi/5 - url: https://api.coralogixsg.com/mgmt/openapi/5 - url: https://api.ap3.coralogix.com/mgmt/openapi/5 security: - apiKeyAuth: [] tags: - name: AI Applications Service description: Manage the catalog of AI applications discovered from spans. externalDocs: url: '' - name: AI Evaluations Service description: >- Manage AI evaluations and the custom evaluation catalog for AI applications. externalDocs: url: '' - name: API Keys Admin Service description: Administrative operations for API Keys management. externalDocs: url: '' - name: API Keys Service description: Manage your API Keys. externalDocs: url: '' - name: Actions Service description: View and manage your Actions. externalDocs: url: '' - name: Alert Scheduler Rule service description: Manage your alert scheduler rules. externalDocs: url: '' - name: Alert definitions service description: >- View and manage your alerts using alert definitions - data structures that contain the configuration required to create an alert. externalDocs: description: Learn more about alerts in our documentation url: https://coralogix.com/docs/user-guides/alerting/introduction-to-alerts/ - name: Alert events service description: >- Get information regarding your alert events - instances of alerts being triggered. externalDocs: description: Learn more about alert events and incidents in our documentation. url: https://coralogix.com/docs/user-guides/alerting/incidents/ - name: Case Events service description: Manage case events, comments, and external thread synchronization. externalDocs: url: '' - name: Case Settings service description: Manage case settings team configurations. externalDocs: url: '' - name: Cases notification service description: Track notification adjacent data for cases. externalDocs: url: '' - name: Cases service description: >- Manage cases throughout their lifecycle. Create, view, assign, acknowledge, unacknowledge, resolve, and close cases to streamline investigations and follow-ups. externalDocs: description: Learn more about Cases in our documentation url: https://coralogix.com/docs/user-guides/cases/ - name: Connector Schema service description: Retrieve connector schemas for notification center integrations externalDocs: description: Learn more about connectors in our documentation url: >- https://coralogix.com/docs/user-guides/notification-center/connectors/introduction/ - name: Connectors service description: >- View and manage your connectors - integration instances for notification destinations externalDocs: description: Lean more about connectors in our documentation url: >- https://coralogix.com/docs/user-guides/notification-center/connectors/introduction/ - name: Contextual data integration service description: Query for contextual data integration information. externalDocs: url: '' - name: Custom Enrichments Service description: Manage your enrichments. externalDocs: url: '' - name: Dashboard folders service description: Manage your dashboard folders. externalDocs: url: '' - name: Dashboard service description: Get information about the Coralogix Dashboard catalog. externalDocs: url: '' - name: Data Usage Query service description: >- Query billable data usage through the public Coralogix API using daily or hourly bucketed aggregations over supported labels. externalDocs: url: '' - name: Data Usage Service description: A service to manage data usage metrics. externalDocs: url: '' - name: Enrichments Service description: Manage your enrichments. externalDocs: url: '' - name: Entities service description: Query information about registered entities in the notification center externalDocs: description: Lean more about the notification center in our documentation url: https://coralogix.com/docs/user-guides/notification-center/introduction/ - name: Events Service description: A service for querying events. externalDocs: description: Learn more about alerts in our documentation url: https://coralogix.com/docs/user-guides/alerting/introduction-to-alerts/ - name: Events2Metrics Service description: Manage your events2metrics. externalDocs: url: '' - name: Extension deployment service description: A service that enables querying for extension deployment information. externalDocs: description: Find out more about extensions in our documentation. url: https://coralogix.com/docs/integrations/extensions/ - name: Extension service description: A service that enables querying for extension information. externalDocs: description: Learn more about extensions in our documentation. url: https://coralogix.com/docs/integrations/extensions/ - name: Folders for views service description: Create and manage view folders. externalDocs: url: '' - name: Global routers service description: >- View and manage your global routers - entities that direct notifications to configured destinations based on conditions externalDocs: description: Lean more about global routers in our documentation url: >- https://coralogix.com/docs/user-guides/notification-center/routing/introduction/ - name: IP access service description: >- IP access service provides the API for managing company IP access settings. externalDocs: url: '' - name: Incidents service description: >- Handle all operations related to incident management within Coralogix. Identify, manage, and resolve incidents efficiently through automated workflows and team collaboration. externalDocs: description: Find out more about incident management in our documentation url: https://coralogix.com/docs/user-guides/alerting/incidents/ - name: Integration service description: A service that enables querying for integration information. externalDocs: description: Find out more about integrations in our documentation. url: https://coralogix.com/docs/integrations/getting-started/ - name: Metrics Data Archive Service description: View and manage your storage targets for metrics. externalDocs: description: Find out more about archives url: >- https://coralogix.com/docs/user-guides/data-flow/s3-archive/connect-s3-archive/ - name: Notifications testing service description: >- Test your notification center configurations including connectors, presets, and templates externalDocs: description: Lean more about the notification center in our documentation url: https://coralogix.com/docs/user-guides/notification-center/introduction/ - name: Outgoing webhooks service externalDocs: description: Find out more about outbound webhooks in our documentation. url: >- https://coralogix.com/docs/user-guides/alerting/outbound-webhooks/generic-outbound-webhooks-alert-webhooks/ - name: Policies Service description: View and manage your TCO policies externalDocs: url: '' - name: Presets service description: >- View and manage your presets - pre-configured templates for notification content rendering externalDocs: description: Lean more about presets in our documentation url: >- https://coralogix.com/docs/user-guides/notification-center/presets/introduction/ - name: Quota Allocation Rule Set service description: Manage quota allocation rules for different entity types. externalDocs: url: '' - name: Recording Rules Service description: A service to manage recording rules. externalDocs: url: '' - name: Retentions Service description: View and manage retentions externalDocs: url: '' - name: Role Management Service description: Service for managing system and custom roles. externalDocs: url: '' - name: Rule Groups Service description: A service to manage rule groups. externalDocs: url: '' - name: SAML Configuration Service description: Manage your SAML configuration externalDocs: url: '' - name: Scopes Service description: A service to manage scopes externalDocs: url: '' - name: Slos Service description: A service for managing Service Level Objectives (SLOs). externalDocs: url: '' - name: Target Service description: View and manage your storage targets for logs. externalDocs: description: Find out more about archives url: >- https://coralogix.com/docs/user-guides/data-flow/s3-archive/connect-s3-archive/ - name: Team Groups Management Service description: Manage Team Groups. externalDocs: url: '' - name: Users Management Service description: >- Manage team members (users) including creation, updates, search, and status management. externalDocs: url: '' - name: Views service description: Create and manage views. externalDocs: url: '' paths: /events2metrics/labels/v2/cardinalities: get: tags: - Events2Metrics Service summary: List E2M Labels Cardinality description: Returns cardinality information for events-to-metrics labels. operationId: Events2MetricService_ListLabelsCardinality parameters: - description: Spans-based query used to evaluate label cardinality. in: query name: spans_query required: false schema: title: SpansQuery type: object properties: actionFilters: maxItems: 1000 minItems: 0 type: array items: maxLength: 4096 minLength: 0 pattern: ^[\s\S]*$ type: string description: The action filters. example: myAction description: The action filters. applicationnameFilters: maxItems: 1000 minItems: 0 type: array items: maxLength: 4096 minLength: 0 pattern: ^[\s\S]*$ type: string description: The applicationname filters. example: myApp description: The applicationname filters. lucene: maxLength: 10000 minLength: 0 pattern: ^[\s\S]*$ type: string description: The lucene. example: applicationName:myApp serviceFilters: maxItems: 1000 minItems: 0 type: array items: maxLength: 4096 minLength: 0 pattern: ^[\s\S]*$ type: string description: The service filters. example: myService description: The service filters. subsystemnameFilters: maxItems: 1000 minItems: 0 type: array items: maxLength: 4096 minLength: 0 pattern: ^[\s\S]*$ type: string description: The subsystemname filters. example: mySubsystem description: The subsystemname filters. description: This data structure represents a query for spans. externalDocs: description: Find out more about events2metrics url: >- https://coralogix.com/docs/user-guides/monitoring-and-insights/events2metrics/ - description: Logs-based query used to evaluate label cardinality. in: query name: logs_query required: false schema: title: SpansQuery type: object properties: alias: maxLength: 255 minLength: 1 pattern: ^[\s\S]*$ type: string description: The alias. example: new_query applicationnameFilters: maxItems: 1000 minItems: 0 type: array items: maxLength: 4096 minLength: 0 pattern: ^[\s\S]*$ type: string description: The applicationname filters. example: app_name description: The applicationname filters. lucene: maxLength: 10000 minLength: 0 pattern: ^[\s\S]*$ type: string description: The lucene. example: 'log_obj.numeric_field: [50 TO 100]' severityFilters: maxItems: 7 minItems: 0 type: array items: $ref: '#/components/schemas/logs2metrics.v2.Severity' description: The severity filters. subsystemnameFilters: maxItems: 1000 minItems: 0 type: array items: maxLength: 4096 minLength: 0 pattern: ^[\s\S]*$ type: string description: The subsystemname filters. example: sub_name description: The subsystemname filters. description: This data structure represents a query for logs. externalDocs: description: Find out more about events2metrics url: >- https://coralogix.com/docs/user-guides/monitoring-and-insights/events2metrics/ - description: The metric labels to evaluate cardinality for. in: query name: metric_labels required: false schema: description: The metric labels to evaluate cardinality for. items: title: Metric Label required: - targetLabel - sourceField type: object properties: sourceField: maxLength: 255 minLength: 1 pattern: ^[\s\S]*$ type: string description: The source field. example: log_obj.string_value targetLabel: maxLength: 255 minLength: 1 pattern: ^[\w/-]+$ type: string description: The target label. example: alias_label_name description: This data structure represents a metric label externalDocs: description: Find out more about events2metrics url: >- https://coralogix.com/docs/user-guides/monitoring-and-insights/events2metrics/ maxItems: 10 minItems: 0 type: array responses: '200': content: application/json: schema: $ref: '#/components/schemas/ListLabelsCardinalityResponse' description: '' externalDocs: url: '' components: schemas: logs2metrics.v2.Severity: enum: - SEVERITY_UNSPECIFIED - SEVERITY_DEBUG - SEVERITY_VERBOSE - SEVERITY_INFO - SEVERITY_WARNING - SEVERITY_ERROR - SEVERITY_CRITICAL type: string description: Severity. ListLabelsCardinalityResponse: type: object properties: permutations: maxItems: 366 minItems: 0 type: array items: $ref: '#/components/schemas/LabelsPermutationsCardinalityDay' description: List of permutations. description: Response containing label cardinality data for events-to-metrics rules. externalDocs: url: '' LabelsPermutationsCardinalityDay: type: object properties: day: maxLength: 10 minLength: 10 pattern: ^\d{4}-\d{2}-\d{2}$ type: string description: The day, formatted as YYYY-MM-DD. permutations: maximum: 2147483647 minimum: 0 type: integer description: Number of label permutations for this day. format: int32 securitySchemes: apiKeyAuth: type: apiKey in: header name: Authorization description: API key authentication ````