Create trace | Opik Documentation

POST/v1/private/tracesCreate trace

Get trace

Request body

application/json

objectTrace_Write

end_timestring · date-time

environmentstring

maxLength 150 · minLength 0

error_infoobject

Show child attributes

exception_typestringrequired

minLength 1

messagestring

tracebackstringrequired

minLength 1

idstring · uuid

inputobject

Show child attributes

anyOf · 3 options

Option 1object

Option 2array of object

Option 3string

last_updated_atstring · date-time

metadataobjectJsonListString_Write ↑

namestring

outputobjectJsonListString_Write ↑

project_namestring

If null, the default project is used

pattern (?s)^\s*(\S.*\S|\S)\s*$

sourcestring

one of "sdk", "experiment", "playground", "optimization", "evaluator"

start_timestring · date-timerequired

tagsarray of string

uniqueItems true

Show child attributes

uniqueItems true

thread_idstring

ttftnumber · double

Time to first token in milliseconds

Example request

{
  "end_time": "2026-06-09T00:00:00Z",
  "environment": "string",
  "error_info": {
    "exception_type": "string",
    "message": "string",
    "traceback": "string"
  },
  "id": "00000000-0000-0000-0000-000000000000",
  "input": {},
  "last_updated_at": "2026-06-09T00:00:00Z",
  "metadata": {},
  "name": "string",
  "output": {},
  "project_name": "string",
  "source": "evaluator",
  "start_time": "2026-06-09T00:00:00Z",
  "tags": [
    "string"
  ],
  "thread_id": "string",
  "ttft": 0
}

Responses

Headers

Location

Examples

curl -X POST 'http://localhost:5173/api/v1/private/traces' \
  -H 'Content-Type: application/json' \
  -d '{"end_time":"2026-06-09T00:00:00Z","environment":"string","error_info":{"exception_type":"string","message":"string","traceback":"string"},"id":"00000000-0000-0000-0000-000000000000","input":{},"last_updated_at":"2026-06-09T00:00:00Z","metadata":{},"name":"string","output":{},"project_name":"string","source":"evaluator","start_time":"2026-06-09T00:00:00Z","tags":["string"],"thread_id":"string","ttft":0}'

const response = await fetch('http://localhost:5173/api/v1/private/traces', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({"end_time":"2026-06-09T00:00:00Z","environment":"string","error_info":{"exception_type":"string","message":"string","traceback":"string"},"id":"00000000-0000-0000-0000-000000000000","input":{},"last_updated_at":"2026-06-09T00:00:00Z","metadata":{},"name":"string","output":{},"project_name":"string","source":"evaluator","start_time":"2026-06-09T00:00:00Z","tags":["string"],"thread_id":"string","ttft":0}),
});
const data = await response.json();

const response = await fetch('http://localhost:5173/api/v1/private/traces', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: "{\"end_time\":\"2026-06-09T00:00:00Z\",\"environment\":\"string\",\"error_info\":{\"exception_type\":\"string\",\"message\":\"string\",\"traceback\":\"string\"},\"id\":\"00000000-0000-0000-0000-000000000000\",\"input\":{},\"last_updated_at\":\"2026-06-09T00:00:00Z\",\"metadata\":{},\"name\":\"string\",\"output\":{},\"project_name\":\"string\",\"source\":\"evaluator\",\"start_time\":\"2026-06-09T00:00:00Z\",\"tags\":[\"string\"],\"thread_id\":\"string\",\"ttft\":0}" });
console.log(await response.json());

import requests

response = requests.request(
    "POST",
    "http://localhost:5173/api/v1/private/traces",
    headers={"Content-Type": "application/json"},
    data='{"end_time":"2026-06-09T00:00:00Z","environment":"string","error_info":{"exception_type":"string","message":"string","traceback":"string"},"id":"00000000-0000-0000-0000-000000000000","input":{},"last_updated_at":"2026-06-09T00:00:00Z","metadata":{},"name":"string","output":{},"project_name":"string","source":"evaluator","start_time":"2026-06-09T00:00:00Z","tags":["string"],"thread_id":"string","ttft":0}',
)
print(response.json())

package main

import (
	"context"
	"net/http"
	"strings"
)

func main() {
	ctx := context.Background()
	body := strings.NewReader(`{"end_time":"2026-06-09T00:00:00Z","environment":"string","error_info":{"exception_type":"string","message":"string","traceback":"string"},"id":"00000000-0000-0000-0000-000000000000","input":{},"last_updated_at":"2026-06-09T00:00:00Z","metadata":{},"name":"string","output":{},"project_name":"string","source":"evaluator","start_time":"2026-06-09T00:00:00Z","tags":["string"],"thread_id":"string","ttft":0}`)
	req, err := http.NewRequestWithContext(ctx, "POST", "http://localhost:5173/api/v1/private/traces", body)
	if err != nil {
		panic(err)
	}
	req.Header.Set("Content-Type", "application/json")
	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer resp.Body.Close()
}

<?php
$request = curl_init("http://localhost:5173/api/v1/private/traces");
curl_setopt($request, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($request, CURLOPT_POSTFIELDS, "{\"end_time\":\"2026-06-09T00:00:00Z\",\"environment\":\"string\",\"error_info\":{\"exception_type\":\"string\",\"message\":\"string\",\"traceback\":\"string\"},\"id\":\"00000000-0000-0000-0000-000000000000\",\"input\":{},\"last_updated_at\":\"2026-06-09T00:00:00Z\",\"metadata\":{},\"name\":\"string\",\"output\":{},\"project_name\":\"string\",\"source\":\"evaluator\",\"start_time\":\"2026-06-09T00:00:00Z\",\"tags\":[\"string\"],\"thread_id\":\"string\",\"ttft\":0}");
curl_setopt($request, CURLOPT_HTTPHEADER, ['Content-Type: application/json']);
$response = curl_exec($request);
curl_close($request);

var request = HttpRequest.newBuilder(URI.create("http://localhost:5173/api/v1/private/traces"))
    .method("POST", HttpRequest.BodyPublishers.noBody())
    .header("Content-Type", "application/json")
    .method("POST", HttpRequest.BodyPublishers.ofString("{\"end_time\":\"2026-06-09T00:00:00Z\",\"environment\":\"string\",\"error_info\":{\"exception_type\":\"string\",\"message\":\"string\",\"traceback\":\"string\"},\"id\":\"00000000-0000-0000-0000-000000000000\",\"input\":{},\"last_updated_at\":\"2026-06-09T00:00:00Z\",\"metadata\":{},\"name\":\"string\",\"output\":{},\"project_name\":\"string\",\"source\":\"evaluator\",\"start_time\":\"2026-06-09T00:00:00Z\",\"tags\":[\"string\"],\"thread_id\":\"string\",\"ttft\":0}"))
    .build();
var response = HttpClient.newHttpClient().send(request, HttpResponse.BodyHandlers.ofString());

require 'net/http'

uri = URI("http://localhost:5173/api/v1/private/traces")
request = Net::HTTPGenericRequest.new("POST", true, true, uri)
request['Content-Type'] = 'application/json'
request.body = "{\"end_time\":\"2026-06-09T00:00:00Z\",\"environment\":\"string\",\"error_info\":{\"exception_type\":\"string\",\"message\":\"string\",\"traceback\":\"string\"},\"id\":\"00000000-0000-0000-0000-000000000000\",\"input\":{},\"last_updated_at\":\"2026-06-09T00:00:00Z\",\"metadata\":{},\"name\":\"string\",\"output\":{},\"project_name\":\"string\",\"source\":\"evaluator\",\"start_time\":\"2026-06-09T00:00:00Z\",\"tags\":[\"string\"],\"thread_id\":\"string\",\"ttft\":0}"
response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |http| http.request(request) }

using var client = new HttpClient();
using var request = new HttpRequestMessage(HttpMethod.Post, "http://localhost:5173/api/v1/private/traces");
request.Content = new StringContent("{\"end_time\":\"2026-06-09T00:00:00Z\",\"environment\":\"string\",\"error_info\":{\"exception_type\":\"string\",\"message\":\"string\",\"traceback\":\"string\"},\"id\":\"00000000-0000-0000-0000-000000000000\",\"input\":{},\"last_updated_at\":\"2026-06-09T00:00:00Z\",\"metadata\":{},\"name\":\"string\",\"output\":{},\"project_name\":\"string\",\"source\":\"evaluator\",\"start_time\":\"2026-06-09T00:00:00Z\",\"tags\":[\"string\"],\"thread_id\":\"string\",\"ttft\":0}", Encoding.UTF8, "application/json");
using var response = await client.SendAsync(request);

(no response body — HTTP 201)