Step-by-Step Guide: How to Use MegaNova’s Free API for Custom AI Roleplay on Chub AI
If you’ve ever used Chub AI to build characters or chat with AI personalities, you know how captivating it can be — but also how fast usage limits and paid tokens can get in the way.
That’s why this guide exists.
With MegaNova’s free, OpenAI-compatible API, especially by the Manta models, you can run your Chub AI sessions smoothly and for free — no hosting and complicated setup.
Let’s dive into how to connect Chub AI with MegaNova’s Free API, so you can enjoy long, expressive conversations without worrying about limits.
What Is Chub AI?
Chub AI is a popular platform for building and chatting with custom AI characters, from friendly companions and mentors to creative roleplay personas.
It’s designed for personalized storytelling, giving users full control over a character’s traits, backstory, and conversation style.
Unlike traditional chatbots, Chub AI emphasizes immersion and emotional consistency, making it a go-to tool for roleplayers, writers, and AI enthusiasts who love narrative-driven experiences.
However, to power these characters, Chub AI needs a compatible inference API — and that’s where MegaNova steps in.
Why Use MegaNova’s Free API?
The MegaNova Free API gives you access to advanced large language models like Manta or DeepSeek, built for conversational depth and creativity.
Here’s why it’s perfect for Chub AI:
| Advantage | Description |
|---|---|
| Completely Free | Get instant access to Manta or DeepSeek without setup fees or hidden charges. |
| OpenAI-Compatible | Works directly with Chub AI’s custom API integration. |
| Fast & Reliable | Low-latency responses ideal for real-time roleplay. |
| Powerful Reasoning | The Manta model blends creativity with logical consistency, making characters feel alive. |
| No Hosting Needed | Everything runs serverlessly — just plug in your key and start chatting. |
Important: To get free access to Manta-Mini and DeepSeek models, please upgrade to Engineer Tier 2 by adding your credit card (no charge) or deposit $10.
Step-by-Step Guide
Step 1: Get Your MegaNova API Key
- Visit MegaNova.ai
- Sign up for a free account.
- Go to your API Keys section and save it
- Copy your new key — it’ll look like
sk-xxxx....
💡 You’ll receive free daily API credits automatically — enough for hours of conversation and experimentation.
Step 2: Choose the Model — Manta
MegaNova currently provides multiple models under its Free API tier, and the most popular for Chub AI users is:
- Model name:
meganova-ai/manta-mini-1.0 - Strengths: Emotionally rich responses, creative storytelling, and consistent persona memory.
This model is a strong alternative to traditional GPT-based systems, balancing both expressiveness and reasoning stability, which makes it perfect for AI roleplay sessions.
Step 3: Connect MegaNova to Chub AI
- Open Chub AI and select Character (or create your own character)
- Settings → Secret
- Choose OpenAI -> Reverse Proxy.
- Proxy:
https://inference.meganova.ai/v1 - Key: paste the API key you have copied from Step 1
- Check Proxy
- Close the tab and back to Configuration:
- Choose Prompt Structure -> Select model
- You can choose some free models like Manta-Mini, DeepSeek-R1, DeepSeek-V3-0324 and more
- Save Settings
That’s all you need, your Chub AI is now connected to MegaNova’s inference engine.
Note: If you dont see Manta and DeepSeek in models dropdown, reload the page.
Step 4: Test It Out
Now, open your favorite Chub AI character and start a new conversation.
Try creative prompts like:
- “Tell me about our last adventure together, in detail.”
- “Describe this world as if you were my guide and friend.”
- “Stay in role no matter what I say — you remember our shared past.”
- “Speak like a wanderer who’s seen everything but still believes in magic.”
You’ll instantly feel the difference — Manta gives your character smoother tone, emotional nuance, and faster replies.
Pro Tip: If you’re experiencing slow response times or blocked requests, try switching to other models like Manta-Flash or Manta-Pro
Tips for a More Realistic Roleplay
- Set temperature between 0.7–0.9 for creative, expressive responses.
- Keep your chat logs, this helps your characters evolve naturally over time.
- Experiment with tone (e.g., poetic, humorous, mentor-like), Manta adapts remarkably well.
- Use system prompts like:
“You are a sentient being who remembers past interactions, speaks naturally, and adapts emotionally.”
Built for Storytellers and Roleplayers
If you use AI as a co-writer, roleplay partner, or emotional mirror, Manta models deliver the perfect balance of structure and creativity. Its responses flow naturally, maintain emotional context, and stay in character over long sessions.
With MegaNova’s free models and plug-and-play setup, you can bring your fictional worlds to life without worrying about cost or complexity.
It’s like having a full creative studio in your browser — fast, free, and made for experimentation.
Conclusion
If you’ve ever wanted to build immersive AI roleplays without paying for APIs or running complex servers, this setup is your answer.
With MegaNova’s Free API (Manta and DeepSeek models), you can instantly plug into Chub AI, Janitor AI or SillyTavern to create deep, consistent, and emotionally rich conversations — all for free.
No barriers, no limits — just creativity and connection.
What’s Next?
Sign up and explore now.
🔍 Learn more: Visit our blog and documents for more insights or schedule a demo to optimize your search solutions.
📬 Get in touch: Join our Discord community for help or Contact Us.
Stay Connected
💻 Website: meganova.ai
📖 Docs: docs.meganova.ai
✍️ Blog: Read our Blog
🐦 Twitter: @meganovaai
🎮 Discord: Join our Discord