Docs/Using Warmerly/Frequently asked questionsWhich plan has API access?Using WarmerlyFrequently asked questionsCopy as MarkdownView .mdAsk ChatGPTAsk ClaudeOne of the frequently asked questions. Agency. Authentication Was this page helpful?YesNoMore from Frequently asked questionsHow do I make sure someone is never contacted again?Add them to the suppression list; suppressed addresses are never sent to by any campaign.→How do I authenticate?An X-Api-Key header, plus X-Project-Id to say which project you are acting in.→Are there rate limits?Yes, per endpoint group, and they are separate from your plan's monthly allowances.→PreviousHow do I make sure someone is never contacted again?NextHow do I authenticate?