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GET
List an experiment's versions

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

limit
integer
default:50

Versions per page, capped at 100

Required range: 1 <= x <= 100
cursor
integer

The nextCursor of the previous page

Required range: x >= 1

Response

Versions of the experiment

versions
object[]
required

Newest first

nextCursor
integer | null
required

Pass as cursor to read the next page, null on the last one

Last modified on August 24, 2026