Channels & providers
How to find and add your AI API key (Anthropic & OpenAI)
Create an API key at OpenAI or Anthropic, add credits, and paste it into Settings → AI to unlock AI features.
OneSimpleInbox's AI features — Reply, Rewrite, Summarize, and Suggest — run on your own AI provider key, so you stay in control and pay your provider directly. You only need ONE key, from either OpenAI (ChatGPT / GPT) or Anthropic (Claude). Create a key, make sure the account has credits, then paste it into Settings → AI.
Which provider should I use?
Either works — choose the one you already have an account with. OpenAI powers GPT models; Anthropic powers Claude models. You can switch anytime in Settings → AI.
Create an OpenAI (ChatGPT) key
1. Go to platform.openai.com and sign in (or create an account).
2. Open the API keys page: platform.openai.com/api-keys
3. Click "Create new secret key", name it "OneSimpleInbox", and create it.
4. Copy the key right away — it starts with "sk-" and is shown only once.
5. Add credits: platform.openai.com/account/billing → add a payment method and buy credits. New keys have no credits by default, which causes the "you have no credits remaining" error.
Create an Anthropic (Claude) key
1. Go to console.anthropic.com and sign in (or create an account).
2. Open Settings → API Keys: console.anthropic.com/settings/keys
3. Click "Create Key", name it "OneSimpleInbox", and create it.
4. Copy the key right away — it starts with "sk-ant-" and is shown only once.
5. Add credits under Plans & Billing so requests can run.
Add your key to OneSimpleInbox
Open Settings → AI, choose your provider, paste the key, pick a default model, and save. The AI buttons unlock right away. Your key is stored encrypted — treat it like a password and never share it.
Costs & the "no credits" error
You pay your AI provider directly for usage (typically a fraction of a cent per request). Both OpenAI and Anthropic require billing/credits to be set up — without them the AI buttons return an error like "OpenAI error (429). You have no credits remaining." Add credits at your provider and try again.