API Authentication

How to authenticate API calls using Bearer tokens or API keys.

Authentication Methods

OnePost API supports two authentication methods:

1. Bearer Token (Supabase Session)

Use your Supabase session token as a Bearer token:

curl -X POST https://useonepost.com/api/v1/generate \
  -H "Authorization: Bearer YOUR_SUPABASE_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"content": "Your newsletter..."}'

Get your token from the Supabase client after login: ``javascript const { data: { session } } = await supabase.auth.getSession(); const token = session.access_token;

2. API Key (X-API-Key header)

Generate an API key at useonepost.com/developersuseonepost.com/developers/developers:

curl -X POST https://useonepost.com/api/v1/generate \
  -H "X-API-Key: op_YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"content": "Your newsletter..."}'

API keys follow the format: op_<prefix><random>

Plan Requirements

Error Codes