Authentication

Documentation Index

Fetch the complete documentation index at: https://docs.unosend.co/llms.txt

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

Authorization: Bearer un_your_api_key

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Getting an API Key

1. Go to API Keys in your dashboard
2. Click Create API Key
3. Copy the key — it starts with un_ and is only shown once

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Using the Key

curl -X POST https://api.unosend.co/emails \
  -H "Authorization: Bearer un_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{"from": "hi@yourdomain.com", "to": ["user@example.com"], "subject": "Test", "html": "<p>Hello</p>"}'

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Security Best Practices

• Never expose keys in client-side code — only use them server-side
• Use environment variables — store keys in UNOSEND_API_KEY, not in source code
• Rotate keys regularly — delete old keys and create new ones in the dashboard
• One key per service — use separate keys for different apps so you can revoke independently

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Error Responses