---
title: "VoiceBlender Streaming Interface (VSI)"
method: GET
path: "/vsi"
tags: ["Events"]
---

# VoiceBlender Streaming Interface (VSI)

`GET /vsi`

Upgrades to a WebSocket connection and streams all events in real-time as JSON text frames. The JSON shape is identical to webhook payloads. The server sends a `{"type":"connected"}` message on connect, followed by events and periodic `{"type":"ping"}` keepalives. Clients may send `{"type":"pong"}` or `{"type":"stop"}` to close gracefully. Unknown message types receive an error response with the echoed `request_id` (reserved for future commands).

## Other responses

- `101` — WebSocket upgrade successful. Server sends events as JSON text frames.

## Changes

- **2026-04-17** `e2bde82c7722` — 1 info
  - endpoint added
- **2026-03-26** `d09c97c6ca8c` — 1 breaking
  - api path removed without deprecation

[Change history](https://skmtc.dev/voiceblender/apis/voiceblender-api/changes/vsi/get.md)

---

[API](https://skmtc.dev/voiceblender/apis/voiceblender-api.md) · [All operations](https://skmtc.dev/voiceblender/apis/voiceblender-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/voiceblender/voiceblender-api/revisions/89ff267f0958/schema)