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POST
Create Engage draft

Authorizations

Authorization
string
header
required

Partner OAuth2 flows for integration API access tokens. Claude MCP custom connectors use authorization code with PKCE S256.

FlowAuthorization Code
Authorization URL
/api/v1/oauth/authorize
Token URL
/api/v1/oauth/token
FlowClient Credentials
Token URL
/api/v1/oauth/token
Scopes1
engage.campaigns:write
Create and update engagement campaigns and drafts.

Headers

X-Organization-Id
string<uuid>

Active organization UUID. Required for authenticated requests when the principal has access to multiple organizations.

Pattern: ^[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

organizationId
string<uuid>

Read-only convenience alias for X-Organization-Id. Legacy subscriberId query param is also accepted.

Pattern: ^[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

application/json
channel
enum<string>
Available options:
email,
linkedin,
slack
draftType
enum<string>
Available options:
send,
template,
campaign
subject
string
Maximum string length: 998
body
string
Maximum string length: 500000
to
string[]
cc
string[]
bcc
string[]
from
string

Display From address only. Does not change draft ownership or whose queue a later send would use. Pass forUserId to file as another org user.

accountId
string<uuid>
Pattern: ^[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}$
forUserId
string<uuid>

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.

Pattern: ^[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}$
attachmentSourceTemplateId
string<uuid>
Pattern: ^[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}$
templateAttachmentIds
string[]

Response

Created draft.

draft
object
required