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Authentication

All API requests must include a valid API key in the Authorization header.

Getting an API Key

  1. Log in to Callem Studio
  2. Navigate to Settings > API Keys
  3. Click Create API Key
  4. Copy the key immediately — it will only be shown once
See the API Keys guide for detailed instructions.

Using the API Key

Include the key in the Authorization header as a Bearer token:

Key Format

API keys start with ck_live_ followed by 60 random hexadecimal characters:

Security

  • The full API key is never stored on our servers — only a SHA-256 hash
  • The key is shown once at creation time
  • Keys can be restricted by IP address (single IPs, CIDR ranges, or * for all)
  • Keys can have an optional expiration date
  • Each key is scoped to a single project

Common Errors