Environment Variables

All environment variables go in .env.local at the project root. Restart the dev server after changes.

Framework

Variable	Required	Description
`LIVEKIT_URL`	✅	LiveKit server WebSocket URL (`wss://...`)
`LIVEKIT_API_KEY`	✅	LiveKit API key
`LIVEKIT_API_SECRET`	✅	LiveKit API secret

Core

Variable	Required	Description
`BUILDER_LLM_PROVIDER`	❌	LLM provider for the AI flow generator: `anthropic` (default) or `gemini`
`BUILDER_LLM_ANTHROPIC_API_KEY`	✅ when `BUILDER_LLM_PROVIDER=anthropic`	AI flow generator (Anthropic)
`BUILDER_LLM_GEMINI_API_KEY`	✅ when `BUILDER_LLM_PROVIDER=gemini`	AI flow generator (Gemini)
`BUILDER_STT_PROVIDER`	❌	STT provider for voice dictation: `deepgram` (default) or `gemini`
`BUILDER_STT_DEEPGRAM_API_KEY`	✅ when `BUILDER_STT_PROVIDER=deepgram`	Voice dictation in builder (Deepgram)
`BUILDER_STT_GEMINI_API_KEY`	✅ when `BUILDER_STT_PROVIDER=gemini`	Voice dictation in builder (Gemini)

LLM

Variable	Provider
`OPENAI_API_KEY`	OpenAI
`GEMINI_API_KEY`	Google Gemini
`GROQ_API_KEY`	Groq
`TOGETHER_API_KEY`	Together AI
`MOONSHOT_API_KEY`	Moonshot AI
`DEEPSEEK_API_KEY`	DeepSeek
`MISTRALAI_API_KEY`	Mistral AI
`CEREBRAS_API_KEY`	Cerebras
`FIREWORKS_API_KEY`	Fireworks AI
`PERPLEXITY_API_KEY`	Perplexity
`XAI_API_KEY`	xAI
`OPENROUTER_API_KEY`	OpenRouter
`OVHCLOUD_API_KEY`	OVHCloud
`BEDROCK_API_KEY`	Amazon Bedrock
`LETTA_API_KEY`	Letta
`OLLAMA_API_KEY`	Ollama (local)
`TELNYX_API_KEY`	Telnyx

TTS

Variable	Provider
`ELEVENLABS_API_KEY`	ElevenLabs
`CARTESIA_API_KEY`	Cartesia
`NEUPHONIC_API_KEY`	Neuphonic
`RESEMBLE_API_KEY`	Resemble AI
`RIME_API_KEY`	Rime
`INWORLD_API_KEY`	Inworld

STT

Variable	Provider
`ASSEMBLYAI_API_KEY`	AssemblyAI
`FAL_API_KEY`	fal.ai
`GLADIA_API_KEY`	Gladia
`SONIOX_API_KEY`	Soniox
`SPEECHMATICS_API_KEY`	Speechmatics

Integrations

Variable	Description
`EXA_API_KEY`	Exa.ai web search

Variable	Required	Description
`LIVEKIT_SANDBOX_ID`	❌	LiveKit Sandbox Token Server ID — needed for public share links. Enable at LiveKit Cloud Settings.

Database

Variable	Required	Description
`DATABASE_URL`	✅	PostgreSQL connection string (e.g. `postgresql://voiceblox:voiceblox@localhost:5432/voiceblox`)
`ENCRYPTION_KEY`	✅	64-char hex key for AES-256-GCM encryption of stored provider credentials. Generate with: `openssl rand -hex 32`

Notes

OPENAI_API_KEY is shared across LLM, TTS (gpt-4o-mini-tts), and STT (Whisper)
BUILDER_STT_DEEPGRAM_API_KEY is for voice dictation in the builder only; use DEEPGRAM_API_KEY for Deepgram STT/TTS nodes in your flow
GROQ_API_KEY is shared across LLM and TTS
BUILDER_LLM_ANTHROPIC_API_KEY is for the AI flow generator only; use ANTHROPIC_API_KEY for Anthropic LLM nodes in your flow
BUILDER_LLM_GEMINI_API_KEY and BUILDER_STT_GEMINI_API_KEY can hold the same Google API key value if you use a single Google project

Getting Started

Building Flows

AI-Powered Generation

Testing Your Agent

Tools

Post-Processing

Deployment

Environment Variables

Environment Variables

Framework

Core

LLM

TTS

STT

Integrations

Database

Notes

​Environment Variables

​Framework

​Core

​LLM

​TTS

​STT

​Integrations

​Sharing

​Database

​Notes

Environment Variables

Framework

Core

LLM

TTS

STT

Integrations

Sharing

Database

Notes