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The public /v1 API uses API keys in the x-api-key header. Send the full API key in the x-api-key header: 
x-api-key: yalg_live_PUBLIC_ID.SECRET

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Key format

YALG keys use this format: 
yalg_live_<publicId>.<secret>
The full value is shown once when the key is created. YALG stores the public id, prefix, last four characters, status, timestamps, and an HMAC/SHA-256 hash of the secret.
API keys are shown once. Store them in a server-side secret manager or environment variable, and never expose them in client-side code.

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Server-side only

API keys should be used from trusted server environments:
  • backend services
  • serverless functions
  • workers and queues
  • internal automation scripts
  • secure CI jobs
Do not use API keys from:
  • browser code
  • public mobile apps
  • static websites
  • client-side extensions
  • public example repositories

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Revoked keys

Revoked keys stop authenticating immediately. A request with a revoked, missing, or malformed key returns 401 Unauthorized.

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Bearer auth

Bearer auth may appear in the OpenAPI security model for internal testing. Public integrations should use x-api-key.