LCharacter draft
Luna
Thoughtful, observant, and quietly curious.
AI interactive experience studio
Create an experience. See how it plays.
CharFab gives creators a private workspace to build and test AI interactive experiences. Shape characters and scenes, bring your own models, and run text or voice sessions to learn what works.
Open beta · Free BYOK workspace · Creator external MCP access · USD 9/month
Test run · private
“You remembered. I was hoping we could pick up where we left off.”
ATest persona
Alex
The version of you this story meets.
Create · run · refine
Prototype the experience, not just the prompt.
Keep characters, scenes, model setup, and private test runs together so you can see how an interaction unfolds and improve it.
Define the character
Shape identity, motivation, personality, behavior, speaking style, voice, and visual direction in one compact profile.
Set the test context
Combine reusable Personas and scenes with any character to probe how it behaves with different people and situations.
Run independent tests
Start multiple sessions with the same setup. Each run stays separate, so experiments do not overwrite one another.
Bring your own models
Connect supported providers and choose separate language models for text chat, low-latency voice, and summaries.
Test text and voice
Review written responses, listen to individual replies, or rehearse with an automatic half-duplex voice call.
Keep work private
Each account receives an isolated workspace. Provider keys are encrypted by the server and are never returned to the browser.
How it works
From first idea to first test run.
Start with the experience you want to explore, then use characters, personas, and scenes to test how it unfolds.
Connect a provider
Add your own provider key and model ID. CharFab validates the connection before enabling it for a test run.
Define the test
Describe the character, choose the Persona they will meet, and add a reusable scene when the situation matters.
Run and refine
Try a private text or voice session, observe the interaction, then revise the setup or start another independent run.
Creator MCP access
Creator · $9/month
Free accounts can create and test in the web workspace with their own model API keys. Creator adds external MCP access for supported creator workflows. Model and voice-provider usage is billed separately by your provider. Creator renews monthly until canceled; the final amount, including any tax charged by CharFab, is shown before you authorize payment.