Create Engage draft
Create an in-progress Engage draft. Does not send mail and does not add a row to the Engage queue or anyone’s approval queue. from is only a display address; pass forUserId (from listOrganizationUsers in the active org) to file the draft as that user.
Authorizations
Partner OAuth2 flows for integration API access tokens. Claude MCP custom connectors use authorization code with PKCE S256.
- Authorization URL
- /api/v1/oauth/authorize
- Token URL
- /api/v1/oauth/token
- Token URL
- /api/v1/oauth/token
Headers
Active organization UUID. Required for authenticated requests when the principal has access to multiple organizations.
^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-5][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}$Query Parameters
Read-only convenience alias for X-Organization-Id. Legacy subscriberId query param is also accepted.
^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-5][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}$Body
email, linkedin, slack send, template, campaign 998500000Display From address only. Does not change draft ownership or whose queue a later send would use. Pass forUserId to file as another org user.
^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-5][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}$Organization user the draft belongs to. Resolve from listOrganizationUsers in the active org — do not infer it from from. Required for client-credential tokens and whenever the authenticated user is not a member of the active organization; otherwise user tokens default to themselves. Creating a draft does not send mail or add a queue/approval row.
^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-5][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}$^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-5][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}$Response
Created draft.