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Use our API to give an application or website permission to interact with your EmailOctopus account.

You'll need to sign in to generate an API key.


  • All requests should be made using HTTPS.
  • JSON objects are recommended for POST requests, but form parameters are also accepted.
  • If you're making a JSON request, include a `Content-Type: application/json` header.
  • All parameters are required unless otherwise specified.


  • Data returned in JSON.
  • Any non-200 HTTP response code can be considered an error.