Create write — POST /v1/metrics/traces/write

POST /v1/metrics/traces/write

Takes {spans:[{traceId, spanId, parentId, name, startNs, endNs, attrs}]}, appends each, and answers {written} — the number of spans sent. Every span is indexed by its trace id as it lands, which is what makes the waterfall read possible without a second store.

Times are NANOSECONDS since the Unix epoch. Retention is a bounded ring of 1048576 spans per org: past that the OLDEST are evicted to keep the newest 1048576, and the trace index is rebuilt — so a long-lived trace can lose its early spans while its later ones survive, and a waterfall read is best-effort against retention, not a guarantee.

The tenant is the gateway-minted X-Org-Id header, falling back to the deployment brand and then default. A body that does not decode is 400.

Request

The document declares no body for POST /v1/metrics/traces/write. The handler is typed in cloud but its shape is not yet emitted, so the fields are not listed here — ask MCP's describe for post_metrics_traces_write, which answers from the running route.

Response

The document declares no response body for this operation. It answers 200 on success and the platform error shape on failure — see Errors.

Examples

hanzo metrics traces write

import { Configuration, MetricsApi } from 'hanzoai';

const api = new MetricsApi(new Configuration({ accessToken: process.env.HANZO_API_KEY }));
const { data } = await api.postMetricsTracesWrite();

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

client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"]))
result = MetricsApi(client).post_metrics_traces_write()

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

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

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

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

let result = metrics_api::post_metrics_traces_write(&cfg, Default::default()).await?;

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

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

var result = new MetricsApi(client).postMetricsTracesWrite();

curl -X POST https://api.hanzo.ai/v1/metrics/traces/write \
  -H "Authorization: Bearer $HANZO_API_KEY"

Metrics API · All Hanzo APIs · Interactive reference