A

ActiveCampaign GraphQL API

GraphQL discovered

Details
Endpoint
https://<your-account>.api-us1.com/api/3/graphql
Spec
introspection
Docs
https://developers.activecampaign.com/reference/about-the-graphql-api
Authentication
ActiveCampaign API token api_key discovered Get key ↗
Api-Token: <credential>

In your ActiveCampaign account, open the Settings page and go to the Developer tab to find your API URL and unique API key. The API docs state that each user in an ActiveCampaign account has their own API key, sent as the Api-Token header. See Authentication and Base URL.