--- title: Zipkin description: Adapter to deliver tracing data to Zipkin. location: https://istio.io/docs/reference/config/policy-and-telemetry/adapters/zipkin.html layout: protoc-gen-docs generator: protoc-gen-docs supported_templates: tracespan number_of_entries: 1 ---

The `zipkin` adapter enables Istio to deliver tracing data to the Zipkin tracing backend.

This adapter supports the tracespan template.

## Params

Configuration format for the `zipkin` adapter.

Field | Type | Description | Required
--- | --- | --- | ---
`url` | `string` | URL of Zipkin HTTP endpoint. Required. | No
`sampleProbability` | `double` | Uniform probability that a trace will be sampled. Defaults to 0 (sampling disabled) if unset. Optional. | No