Create a draft
**Deprecated on the v2 branch model.** Migrate to `PUT /agent/{id}/branches/{branchId}/draft`. When `ENABLE_BRANCH_MODEL` is on, this endpoint returns `409 versioning_v2_migration_required` with the `Deprecation: true` header. See the [migration guide](/voice-agents/deprecations/agent-versioning-migration).
Create a new draft from an existing published version or another draft. At least one of sourceVersionId or sourceDraftId is required (both may be sent simultaneously).
Authentication
AuthorizationBearer
API key from the console ApiKey collection, sent as Bearer token. Also accepts session cookies for browser-based auth.
Path parameters
id
The agent ID.
Request
This endpoint expects an object.
sourceVersionId
ID of a published version to branch from. Must be a valid MongoDB ObjectId (24-char hex). Sending a non-ObjectId format returns 400.
sourceDraftId
ID of an existing draft to branch from
draftName
Optional name for the draft (1–100 characters)
Response
Draft created successfully
status
data
Represents either a draft revision or a published version of an agent's configuration.
Errors
400
Bad Request Error
401
Unauthorized Error
403
Forbidden Error
404
Not Found Error
409
Conflict Error
500
Internal Server Error

