---
title: "List agent versions for a project"
method: GET
path: "/api/v1/platform/sessions/{sessionID}/agent-versions"
tags: ["sessions"]
---

# List agent versions for a project

`GET /api/v1/platform/sessions/{sessionID}/agent-versions`

## Request

- Base URL: `https://api.smith.langchain.com`
- URL: `https://api.smith.langchain.com/api/v1/platform/sessions/{sessionID}/agent-versions`
- Auth: one of:
  - API key in header `X-API-Key`
  - API key in header `X-Tenant-Id`
  - HTTP bearer

Returns all agent versions (commit SHAs) seen in the given tracing project, ordered by first_seen_at descending.

## Path parameters

- `sessionID` string, required

## Response `200`

Agent versions

- TracerSessionsAgentVersionResponse[]
  - `commit_sha` string
  - `first_seen_at` string

## Other responses

- `400`: Invalid session ID
- `401`: Unauthorized

## Changes

- **2026-10-16** `1a8ee9358d81`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/langchain-ai/apis/langsmith/changes/api/v1/platform/sessions/:sessionID/agent-versions/get.md)

---

[API](https://skmtc.dev/langchain-ai/apis/langsmith.md) - [All operations](https://skmtc.dev/langchain-ai/apis/langsmith/llms.txt) - [OpenAPI document](https://skmtc.dev/langchain-ai/apis/langsmith/revisions/7a01c01f75e8?raw)