RTZR plugin for LiveKit Agents

Support for RTZR Streaming STT via WebSocket interface, following the "Streaming STT" guide in the RTZR Developers docs.

  • Docs: https://developers.rtzr.ai/docs/en/ (see Streaming STT)

Installation

pip install livekit-plugins-rtzr

Prerequisites

Obtain client_id and client_secret from the RTZR Developers Console.

Set credentials as environment variables:

RTZR_CLIENT_ID=<your_client_id>
RTZR_CLIENT_SECRET=<your_client_secret>

# Override base HTTP API URL (used for token issuance)
RTZR_API_BASE=https://openapi.vito.ai

# Override WebSocket URL (used for live streaming)
RTZR_WEBSOCKET_URL=wss://openapi.vito.ai

If RTZR_WEBSOCKET_URL is not set, the plugin will derive it from RTZR_API_BASE by replacing the scheme with wss://.

Usage

Use RTZR STT in an AgentSession or as a standalone streaming service.

from livekit.agents import AgentSession
from livekit.plugins import rtzr

# Basic usage with env-based credentials
stt = rtzr.STT()

session = AgentSession(
    stt=stt,
    # ... llm, tts, etc.
)

Keyword boosting (Streaming STT only, sommers_ko model only):

stt = rtzr.STT(
    model="sommers_ko",
    keywords=[
        "키워드",
        ("부스팅", 3.5),
        "키위드:-1.0",
    ],
)

Rules:

  • Use list entries as keyword or keyword:score, or use (keyword, score) tuples.
  • Score must be between -5.0 and 5.0, up to 100 keywords, each <= 20 chars.
  • Keywords must be written in Korean pronunciation (Hangul and spaces only); non-Korean input will error.

Notes:

  • The WebSocket streaming endpoint accepts raw PCM frames when encoding=LINEAR16.
  • The plugin relies on the server-side endpointing (EPD). You do not need to send finalize messages.
  • When the pipeline closes the stream, the plugin sends EOS to end the session.

Project links

Data verified by PyPI on Aug 3, 2026
Data provided by the project maintainers, verified at the time the release was uploaded to PyPI.

Key dates

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  • Released:
Newer release available (1.6.9)

Owner

PyPI data
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Credits

Author: RTZR

GitHub Statistics

Data verified by PyPI on Aug 3, 2026
The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License expression

Apache-2.0
View SPDX License List

Requires

Python >=3.10.0

Tags

audio livekit realtime rtzr speech-to-text video webrtc

Classifiers

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