---
title: "Delete a session by identifier"
method: DELETE
path: "/v1/sessions/{session_identifier}"
tags: ["sessions"]
---

# Delete a session by identifier

`DELETE /v1/sessions/{session_identifier}`

Delete a session by its identifier. The identifier can be either:
1. A global ID (base64-encoded)
2. A user-provided session_id string

This will permanently remove the session and all associated traces, spans, and annotations via cascade delete.

## Path parameters

- `session_identifier` string, required — The session identifier: either a GlobalID or user-provided session_id string.

## Response `204`

Successful Response

## Other responses

- `403` — Forbidden
- `404` — Not Found
- `422` — Validation Error

---

[API](https://skmtc.net/arize-ai/apis/arize-phoenix-rest-api.md) · [All operations](https://skmtc.net/arize-ai/apis/arize-phoenix-rest-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/arize-ai/arize-phoenix-rest-api/revisions/d61b825a4bb4/schema)