Preview metric reduction rules

Estimates the series reduction and the dashboards and alerts a candidate volume-control rule would touch, without persisting it.

POST /v1/o11y/metric_reduction_rules/preview

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Address	`https://api.hanzo.ai/v1/o11y/metric_reduction_rules/preview`
Method	`POST`
Operation	`PreviewMetricReductionRule`
Auth	`Authorization: Bearer $HANZO_API_KEY`

Estimates the series reduction and the dashboards and alerts a candidate volume-control rule would touch, without persisting it.

Request

4 fields, body application/json (required).

Field	In	Type	Required	Description
`labels`	body	string[]	yes	Labels are the label names the rule would match.
`lookbackMs`	body	integer (int64)	—	LookbackMs is how far back to sample when estimating.
`matchType`	body	string	yes	MatchType is drop or keep.
`metricName`	body	string	yes	MetricName is the metric the rule would govern.

Response

Status	Body	Meaning
`200`	o11y.O11yReductionRulePreviewOut	ok
`202`	Approval	held for approval
`default`	problem-details	refused

200 body — 16 fields.

Field	In	Type	Always	Description
`data`	body	o11y.O11yReductionRulePreview	—
`data.affectedAssets`	body	o11y.O11yAffectedAsset[]	—	AffectedAssets are the dashboards and alerts the rule would touch.
`data.affectedAssets[].id`	body	string	—	ID is the asset's id.
`data.affectedAssets[].impactedLabels`	body	string[]	—	ImpactedLabels are the rule labels the asset uses.
`data.affectedAssets[].name`	body	string	—	Name is the asset's name.
`data.affectedAssets[].type`	body	string	—	Type is dashboard or alert_rule.
`data.affectedAssets[].widget`	body	o11y.O11yAffectedWidget	—
`data.affectedAssets[].widget.id`	body	string	—	ID is the panel's id.
`data.affectedAssets[].widget.name`	body	string	—	Name is the panel's name.
`data.currentRetainedSeries`	body	integer (uint64)	—	CurrentRetainedSeries is how many survive the rules in force today.
`data.droppedLabels`	body	string[]	—	DroppedLabels are the labels the rule would drop.
`data.effectiveFrom`	body	string (date-time)	—	EffectiveFrom is when the rule would take effect.
`data.ingestedSeries`	body	integer (uint64)	—	IngestedSeries is how many series the metric ingests today.
`data.reductionPercent`	body	number (double)	—	ReductionPercent is the estimated reduction, in percent.
`data.retainedSeries`	body	integer (uint64)	—	RetainedSeries is how many would survive with the candidate rule.
`status`	body	string	—	Status is "success".

Failure carries the platform error shape — see Errors.

Examples

CLI

SDK

HTTP

MCP

hanzo o11y metric_reduction_rules preview \
  --labels '["<labels>"]' \
  --match-type <matchType> \
  --metric-name <metricName>

.ts

.py

.go

.rs

.java

import { Configuration, O11yApi } from 'hanzoai';

const api = new O11yApi(new Configuration({ accessToken: process.env.HANZO_API_KEY }));
const { data } = await api.previewMetricReductionRule({ metricName: "<metricName>", matchType: "<matchType>", labels: ["<labels>"] });

from hanzoai.cloud import ApiClient, Configuration
from hanzoai.cloud.api import O11yApi

client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"]))
result = O11yApi(client).preview_metric_reduction_rule(metric_name="<metricName>", match_type="<matchType>", labels=["<labels>"])

cfg := hanzoai.NewConfiguration()
cfg.AddDefaultHeader("Authorization", "Bearer "+os.Getenv("HANZO_API_KEY"))
client := hanzoai.NewAPIClient(cfg)

resp, _, err := client.O11yAPI.PreviewMetricReductionRule(context.Background()).Execute()
if err != nil {
	return err
}

use hanzo_client::apis::{configuration::Configuration, o11y_api};

let mut cfg = Configuration::new();
cfg.bearer_access_token = std::env::var("HANZO_API_KEY").ok();

let result = o11y_api::preview_metric_reduction_rule(&cfg, Default::default()).await?;

import ai.hanzo.cloud.ApiClient;
import ai.hanzo.cloud.api.O11yApi;

ApiClient client = new ApiClient();
client.setBearerToken(System.getenv("HANZO_API_KEY"));

var result = new O11yApi(client).previewMetricReductionRule();

curl -X POST https://api.hanzo.ai/v1/o11y/metric_reduction_rules/preview \
  -H "Authorization: Bearer $HANZO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
       "metricName": "<metricName>",
       "matchType": "<matchType>",
       "labels": [
         "<labels>"
       ]
     }'

Tool o11y, op PreviewMetricReductionRule — POST the JSON-RPC envelope to https://api.hanzo.ai/v1/mcp.

curl -X POST https://api.hanzo.ai/v1/mcp \
  -H "Authorization: Bearer $HANZO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
       "jsonrpc": "2.0",
       "id": 1,
       "method": "tools/call",
       "params": {
         "name": "o11y",
         "arguments": {
           "op": "PreviewMetricReductionRule",
           "input": {
             "metricName": "<metricName>",
             "matchType": "<matchType>",
             "labels": [
               "<labels>"
             ]
           }
         }
       }
     }'

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