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Documentation Index

Fetch the complete documentation index at: https://docs.caistrolabs.com/llms.txt

Use this file to discover all available pages before exploring further.

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API Keys

All requests to the Caistro API must include an API key. You can manage your keys in the Console.

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Creating an API Key

  1. Log in to the Console
  2. Navigate to API Keys
  3. Click Generate Key
  4. Copy your key immediately - it won’t be shown again

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Using Your API Key

Include your API key in the Authorization header: 
Authorization: Bearer cai_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

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Security Best Practices

Never expose your API key in client-side code or public repositories.
  • Store keys in environment variables
  • Rotate keys periodically
  • Use separate keys for development and production
  • Revoke compromised keys immediately

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Billing

Caistro uses a credit-based pay-as-you-go model:
ModelInputOutput
Nous-20B$0.20 / 1M tokens$0.60 / 1M tokens
New users receive $1.00 in free credits (approximately 5M input tokens). Free credits are used first before prepaid credits. Purchase additional credits anytime in the Console.

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Rate Limits

When you exceed your rate limit, you’ll receive a 429 Too Many Requests response.

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Error Responses

StatusDescription
401Invalid or missing API key
402Insufficient credits
403Key doesn’t have permission
429Rate limit exceeded