Create a new meter definition.
Meters define how events are aggregated into metrics:
Use eventFilter to scope the meter to specific event types or dimensions.
API Key or Personal Access Token (PAT). When using PAT, include X-Project header.
Meter created
Unique identifier for the meter
Project ID (null for global defaults)
Human-readable name
Description of what this meter measures
Aggregation type (sum, count, max, latest)
Field to aggregate (e.g., "values.total_tokens", "*" for count)
Filter for matching events
Created timestamp
Updated timestamp