AssemblyAI plugin for LiveKit Agents
Support for Streaming Speech-to-Text and Streaming Text-to-Speech from AssemblyAI.
More information is available in the docs for the STT integration and for AssemblyAI's Streaming TTS.
Installation
pip install livekit-plugins-assemblyai
Pre-requisites
You'll need to specify an AssemblyAI API Key. It can be set as environment variable: ASSEMBLYAI_API_KEY.
Usage
from livekit.agents import AgentSession, TurnHandlingOptions
from livekit.plugins import assemblyai
session = AgentSession(
stt=assemblyai.STT(model="universal-3-6-pro", mode="balanced"),
tts=assemblyai.TTS(
model="assemblyai-tts-1",
voice="987db62e-a2c2-569a-9c4d-82460cdea1bd", # Keegan
),
# let AssemblyAI decide when the user has finished speaking
turn_handling=TurnHandlingOptions(turn_detection="stt"),
# use the TTS word timings for the transcript and for what an interrupted reply said
use_tts_aligned_transcript=True,
# ... llm, vad, etc.
)
Speech-to-text
assemblyai.STT streams Universal-3.6 Pro by default (model). Useful options:
mode:"min_latency","balanced"or"max_accuracy".language_codes: steer transcription toward one or more expected languages ("es"or["en", "es"]).prompt: context about the audio, such as its domain or scenario, to help recognize likely vocabulary (up to 1,750 characters).keyterms_prompt: names and terms the model should get right.
Text-to-speech
assemblyai.TTS streams speech over a pooled WebSocket and cancels in-flight audio when the user
interrupts. Useful options:
voice: a voice's id, from the voice library or a custom (cloned) voice; defaults to Keegan. Slugs such as"aai-linda-3"also work, but can change, while ids don't.language: a code such as"es", set independently of the voice.model: defaults toassemblyai-tts-1.base_url: the US data zone by default;wss://tts.eu.assemblyai.comkeeps data in the EU.word_timestamps: per-word timings (defaultTrue). WithAgentSession(use_tts_aligned_transcript=True), LiveKit uses them to sync the transcript and to record an interrupted reply up to the word the user heard.
Call tts.prewarm() to open the session before the first reply.
Metadata
Release files for livekit-plugins-assemblyai 1.8.9
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | Provenance | |
|---|---|---|---|---|
| livekit_plugins_assemblyai-1.8.9.tar.gz | 26.1 kB | With provenance | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| livekit_plugins_assemblyai-1.8.9-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 53.3 kB
Release files / livekit_plugins_assemblyai-1.8.9.tar.gz
| Download URL | livekit_plugins_assemblyai-1.8.9.tar.gz |
|---|---|
| Size | 26.1 kB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
c771ec7ac6c3c909ca15dcccf03d678eac23ce029c48e48d8b74d87ccfe32fbc
|
|
BLAKE2b-256 checksum How to use checksums |
6e74cb3e173f4ca7796fc953e44da0476c3149a63ea4e524a170154f21b3925d
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
|
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Oct 24, 2026.
Transparency logRelease files / livekit_plugins_assemblyai-1.8.9-py3-none-any.whl
| Download URL | livekit_plugins_assemblyai-1.8.9-py3-none-any.whl |
|---|---|
| Size | 27.2 kB |
| Tags | Python 3 |
|
SHA-256 checksum How to use checksums |
b16f6971e8551672e233b34ad0a2f9d7f018c0b113a4a682cf0a7926c7a2dbd5
|
|
BLAKE2b-256 checksum How to use checksums |
6f713b43d72d053e21eff9cf0b6650b2bff5671b11b38c4126ad40e11810f8e3
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
|
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Oct 24, 2026.
Transparency logSecurity for livekit-plugins-assemblyai 1.8.9
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
Full provenance
All 2 files in this release have been uploaded with provenance metadata.
Attestation for livekit_plugins_assemblyai-1.8.9.tar.gz
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Oct 24, 2026.
Transparency logA note on package security
PyPI is a repository for distributing packages, not a service for auditing them. While third-party security researchers and our staff do their best to detect and remove malicious packages, PyPI cannot guarantee the quality, security or suitability of any given package.
To learn more about protecting yourself from malicious actors, visit our package security documentation.
