---
title: "Get shadow evaluation metrics for a binding"
method: GET
path: "/zones/{zone_id}/policy-bindings/{binding_id}/metrics"
tags: ["PolicyBindings"]
---

# Get shadow evaluation metrics for a binding

`GET /zones/{zone_id}/policy-bindings/{binding_id}/metrics`

Returns shadow evaluation metrics for a specific binding. Use query parameters to change scope:
- `scope=zone` — zone-level aggregate across all pairings
- `psv_id=<id>` — metrics for a specific policy set version (in any role),

  including per-pairing breakdown

## Path parameters

- `zone_id` string, required
- `binding_id` string, required

## Query parameters

- `scope` 'binding' | 'zone'
- `policy_set_id` string
- `psv_id` string
- `since` string, date-time

## Headers

- `X-API-Version` string
- `X-Client-Request-ID` string, uuid

## Response `200`

Shadow evaluation metrics

- PdpPolicySetShadowMetricsSummary
  - `total_evaluations` integer, required
  - `agree_count` integer, required
  - `shadow_allow_active_deny_count` integer, required
  - `shadow_deny_active_allow_count` integer, required
  - `agreement_rate` number, float — Fraction of evaluations where active and shadow decisions agreed (0.0–1.0)
  - `avg_shadow_duration_ms` integer
  - `stddev_shadow_duration_ms` integer
  - `since` string, date-time, required
  - `pairings` PdpPolicySetShadowPairingSummary[] — Per-pairing breakdown. Present when querying by PSV.
    - `active_psv_id` string, required
    - `shadow_psv_id` string, required
    - `total` integer, required
    - `agree_count` integer, required
    - `first_eval` string, date-time, required
    - `last_eval` string, date-time, required

## Other responses

- `400` — bad request error response when caller supplied invalid input data
- `401` — unauthorized error response when caller session is not authenticated
- `403` — forbidden error response when caller does not have permissions to a resource
- `404` — not found error response when caller does not have permission to see a resource or the resource does not exist
- `429` — rate limit exceeded error response when caller has exhausted api limits for the given time period
- `500` — internal server error response when server encountered error of its own creation
- `default` — internal server error response when server encountered error of its own creation

---

[API](https://skmtc.net/keycardai/apis/untitled-api.md) · [All operations](https://skmtc.net/keycardai/apis/untitled-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/keycardai/untitled-api/revisions/2f5033ed4491/schema)