AI Providers
AI Providers
Capsul is bring-your-own-key (BYOK). You supply your own API key from one of three supported providers. Your key is encrypted before being stored and is never exposed to other users.
Comparison
| Provider | Free tier | Speed | Quality | Best for |
|---|---|---|---|---|
| Groq | Generous free tier | 🚀 Extremely fast | ⭐⭐⭐⭐ | Quick prototyping, iteration speed |
| OpenRouter | Free models available | ⚡ Fast–medium | ⭐⭐⭐⭐⭐ | Access to newest frontier models |
| NVIDIA NIM | $0 API credits on sign-up | ⚡ Fast | ⭐⭐⭐⭐⭐ | Large reasoning models, DeepSeek R1 |
How to get a key
- 1Sign up for an account at the provider's website.
- 2Generate an API key from your dashboard.
- 3In Capsul, go to Settings → API Keys and paste the key.
- 4Your key is encrypted and stored. Choose a provider in the Model Selector when building.
Security
Keys are encrypted with AES-256-GCM before being written to the database. The raw key is only decrypted in memory on the server when an AI call is made, and is never returned to the client or logged.