Skip to main content
GET
Read an experiment's setup

Authorizations

X-Auth-Token
string
header
required

Project API key for sending traces and accessing project-scoped resources. Format: sk-lw-... (no underscore). Obtain one by creating a project via the Admin API or the LangWatch UI.

Path Parameters

slug
string
required

Query Parameters

fields
enum<string>

Set to version to answer with the version and timestamp only

Available options:
version

Response

The experiment's setup, or its version alone

id
string
required
slug
string
required
name
string | null
required
state
object | null
required

The experiment setup: datasets, targets and evaluators. Read it, change it, send it back whole.

version
integer
required

Send this back as expectedVersion to save safely

updatedAt
string
required

ISO 8601 timestamp of the last save

Last modified on August 24, 2026