Apache Zipkin REST API

The Zipkin REST API v2 provides endpoints for querying trace data, service names, span names, and dependencies. Key endpoints include GET /api/v2/services (list services), GET /api/v2/spans (list span names for a service), GET /api/v2/traces (search traces by service, span, tags, duration), GET /api/v2/trace/{traceId} (get a specific trace), and GET /api/v2/dependencies (service dependency graph). Span reporting uses POST /api/v2/spans for JSON format or POST /api/v2/spans for Thrift format.