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Why Use Your Own Keys?

  • No credit limits: Use as much as you need
  • Direct billing: Pay OpenAI or Anthropic directly
  • Full control: Manage your own usage and costs

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Getting API Keys

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OpenAI API Key

  1. Go to platform.openai.com
  2. Sign in or create an account
  3. Navigate to API Keys in the sidebar
  4. Click Create new secret key
  5. Copy the key (starts with sk-)

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Anthropic API Key

  1. Go to console.anthropic.com
  2. Sign in or create an account
  3. Navigate to API Keys
  4. Click Create Key
  5. Copy the key (starts with sk-ant-)

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Adding Keys to Paperline

  1. Open Paperline
  2. Go to Settings
  3. Enter your keys:
    • OpenAI API Key: For GPT-5 mini
    • Anthropic API Key: For Claude Haiku 4.5
  4. Click Save
Your keys are stored securely on your Mac using encrypted storage.

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Security

API keys are stored locally on your Mac using macOS Keychain encryption. They are never sent to Paperline servers.
No. Your keys are used only to make API calls directly from your Mac to OpenAI or Anthropic.
You can generate new keys from the OpenAI or Anthropic dashboards. Old keys can be revoked there as well.

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Billing

When using your own API keys:
  • OpenAI: Billed through your OpenAI account
  • Anthropic: Billed through your Anthropic account
Paperline does not charge for AI usage when you use your own keys.

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Estimated Costs

ModelApproximate Cost per 1K tokens
GPT-5 mini~0.0003input/0.0003 input / 0.001 output
Claude Haiku 4.5~0.0008input/0.0008 input / 0.004 output

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Troubleshooting

  • Check that you copied the full key
  • Ensure there are no extra spaces
  • Verify the key is active in your provider’s dashboard
Your API key may have usage limits. Check your provider’s dashboard for current limits and usage.
Ensure you have a valid payment method set up with OpenAI or Anthropic.