---
title: "Get Observability Histogram"
method: GET
path: "/agentic/observability/histogram"
tags: ["Agents Observability"]
---

# Get Observability Histogram

`GET /agentic/observability/histogram`

Status-stacked call-rate histogram.

Same filter shape as ``/sessions``. Default range is last 24h.

## Query parameters

- `agent_id` string, nullable
- `project_key_id` string, nullable
- `client_id` string, nullable
- `from` string, nullable — Time range start (ISO 8601)
- `to` string, nullable — Time range end (ISO 8601)
- `tool` string, nullable
- `status` string, nullable
- `buckets` integer
- `kind` string, nullable — Row kind dispatch — see /sessions for the enum
- `entity_kind` string, nullable — Entity scope dispatch — see /sessions for the enum

## Response `200`

Successful Response

- ObservabilityHistogramResponse
  - `buckets` ObservabilityHistogramBucket[], required
    - `bucket_start` string, date-time, required
    - `success` integer, required
    - `error` integer, required
    - `denied` integer, required
  - `total` integer, required

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.net/streamkap/apis/streamkap-rest-api.md) · [All operations](https://skmtc.net/streamkap/apis/streamkap-rest-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/streamkap/streamkap-rest-api/versions/8aea6143d003/schema)