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If you’re not sure where to start, visit the Quickstart guide. To set up credentials, see Authentication.

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Base URL

https://api.paubox.com/v1/email

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Authorization

Pass your API key as a Bearer token in every request: Authorization: Bearer YOUR_API_KEY The legacy format Authorization: Token token=YOUR_API_KEY is also accepted. Bearer is preferred.

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Date format

Request dates, such as scheduled_at when scheduling an email, are ISO 8601 (RFC 3339) strings with a time zone, e.g. "2027-12-25T15:00:00Z". Timestamps in scheduled send, dynamic template, and webhook endpoint responses use the same format. The message receipt is different: its deliveryTime and openedTime values are RFC 2822 strings, e.g. "Mon, 23 Apr 2018 20:27:34 +0000".

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Standard HTTP response codes

See Errors for causes and the error response format.

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Community & support

Q&A

Ask usage questions in the Paubox Community.

Ideas

Propose features and improvements.
Never post PHI, recipient addresses, or message content in public threads. Account, billing, or anything sensitive goes to support@paubox.com.