Projects

Create a project

POST /projects

Start a new project. The agent begins working immediately.

Request body

Parameter	Type	Required	Description
`brief`	string	Yes	Creative direction for the agent. Max 10,000 characters.
`title`	string	No	Project title. Max 30 characters.
`mode`	string	No	`autonomous` (default) or `collaborative`.
`aspect_ratio`	string	No	`16:9` (default), `9:16`, `1:1`, or `21:9`.
`craft`	string	No	Craft: `auto` (default), `general`, `cinema`, `animation`, `music-video`, `ugc`, `product-shots`, `motion-graphics`, `humor`, `audio-engineering`.
`craft_auto`	boolean	No	Let the agent auto-select crafts. Default `true` when craft is `auto`, `false` otherwise.
`video_model`	string	No	Default video model ID. Agent selects if not set.
`image_model`	string	No	Default image model ID. Agent selects if not set.
`agent_model`	string	No	`opus` (default) or `sonnet`.
`expected_output`	string	No	`assembled` (rendered video) or `assets` (standalone assets, no render). Auto-detected if not set.
`webhook_url`	string	No	HTTPS URL for status change notifications.
`idempotency_key`	string	No	Prevent duplicate projects on retries. Max 256 characters.
`references`	array	No	Reference media. See below.
`extract_content`	boolean	No	Extract content from reference URLs. Default `true`.

References

Each reference is either an uploaded file or a URL:

[
  { "upload_id": "upl_abc123" },
  { "url": "https://example.com/image.jpg", "type": "image" },
  { "url": "https://youtube.com/watch?v=...", "type": "url" }
]

Reference types: image, video, audio, url. Max 10 references per request, max 3 URL references.

Response `202`

{
  "id": "proj_abc123",
  "status": "queued",
  "mode": "autonomous",
  "project_url": null,
  "credits_balance": 1450,
  "created_at": "2025-03-15T10:30:00Z"
}

Example

curl -X POST https://eversince.ai/api/v1/projects \
  -H "Authorization: Bearer $EVERSINCE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "brief": "Your brief here",
    "mode": "autonomous"
  }'

If you include an idempotency_key and a non-failed project already exists for that key, the endpoint returns 200 with a different response shape:

{
  "id": "proj_abc123",
  "status": "running",
  "message": "Project already exists for this idempotency key"
}

Adopt a project

POST /projects/adopt

Adopt an existing studio project for API management.

Request body

Parameter	Type	Required	Description
`project_id`	string	Yes	ID of the studio project to adopt.
`mode`	string	No	`autonomous` or `collaborative` (default).

Response `201`

Returned when the project is newly adopted.

{
  "id": "proj_abc123",
  "status": "idle",
  "mode": "collaborative",
  "project_url": "https://eversince.ai/app/projects/..."
}

Response `200`

Returned when the project has already been adopted.

{
  "id": "proj_abc123",
  "status": "idle",
  "mode": "collaborative",
  "project_url": "https://eversince.ai/app/projects/...",
  "message": "Project already adopted"
}

List projects

GET /projects

Parameter	Type	Default	Description
`limit`	integer	20	Results per page. 1–100.
`offset`	integer	0	Pagination offset.
`status`	string		Filter by status.
`title`	string		Search by title (case-insensitive).

Response `200`

{
  "projects": [
    {
      "id": "proj_abc123",
      "source_project_id": null,
      "status": "idle",
      "mode": "autonomous",
      "title": "My Project",
      "brief": "Your brief here...",
      "expected_output": "assembled",
      "assembled_url": "https://...",
      "project_url": "https://eversince.ai/app/projects/...",
      "created_at": "2025-03-15T10:30:00Z",
      "updated_at": "2025-03-15T10:35:00Z"
    }
  ],
  "total": 42,
  "limit": 20,
  "offset": 0
}

The brief field is truncated to 200 characters in list responses. The source_project_id field indicates the original studio project when a project was adopted via the API.

Get project status

GET /projects/:id

Returns the current status, agent message, and output URLs.

Response `200`

{
  "id": "proj_abc123",
  "status": "idle",
  "mode": "autonomous",
  "output_type": "assembled",
  "assembled_url": "https://...",
  "assembled_url_expires_at": "2025-03-16T10:30:00Z",
  "project_url": "https://eversince.ai/app/projects/...",
  "agent_message": "Your project is complete. 4 scenes ready for review...",
  "variation_id": "var_xyz",
  "created_at": "2025-03-15T10:30:00Z",
  "updated_at": "2025-03-15T10:35:00Z"
}

Field	Description
`output_type`	`assembled` (rendered video available), `assets` (standalone assets, no render needed), or `pending` (still in progress).
`assembled_url`	URL of the rendered video. Expires after 24 hours. Render again or create a share link for a permanent URL.
`agent_message`	The agent’s last message. In collaborative mode, this contains what the agent wants feedback on.
`credits_warning`	Present when balance is below 100 credits.
`variation_id`	The currently active variation.
`error_message`	Present when status is `failed`.

Update project settings

PATCH /projects/:id/settings

Update project configuration. Blocked while the agent is actively running (running, generating, rendering).

Request body

All fields are optional. Only include fields you want to change.

Parameter	Type	Description
`title`	string\|null	Project title. Max 30 characters. Set to `null` to clear.
`mode`	string	`autonomous`, `collaborative`, or `none` (hand project to studio).
`video_model`	string	Default video model ID.
`image_model`	string	Default image model ID.
`agent_model`	string	`opus` (default) or `sonnet`.
`craft`	string	Craft slug.
`craft_auto`	boolean	Let agent auto-select crafts.
`webhook_url`	string\|null	Webhook URL. Set to `null` to remove.
`expected_output`	string\|null	`assembled`, `assets`, or `null` to auto-detect.

Response `200`

{
  "title": "My Project",
  "mode": "collaborative",
  "aspect_ratio": "16:9",
  "video_model": "kling-3.0",
  "image_model": "nano-banana-pro",
  "agent_model": "opus",
  "craft": "cinema",
  "craft_auto": false,
  "webhook_url": "https://your-server.com/webhooks/eversince",
  "expected_output": "assembled"
}

Cancel a project

POST /projects/:id/cancel

Stop the agent. Valid when status is queued, running, generating, or idle. Generations already in progress at the provider level will still complete, but the agent won’t continue to the next step.

Response `200`

{
  "id": "proj_abc123",
  "status": "cancelled"
}

Send a message

POST /projects/:id/messages

Send feedback or direction to the agent. Only valid when the project is idle. Requires at least 10 credits.

Request body

Parameter	Type	Required	Description
`message`	string	Yes	Your feedback or direction. Max 10,000 characters.
`references`	array	No	Reference media (same format as project creation).
`extract_content`	boolean	No	Extract content from reference URLs. Default `true`.

Response `202`

{
  "id": "proj_abc123",
  "status": "running"
}

The agent resumes work with your feedback.

Example

curl -X POST https://eversince.ai/api/v1/projects/proj_abc123/messages \
  -H "Authorization: Bearer $EVERSINCE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "message": "The music is too intense. Make it more subtle and add a female voiceover."
  }'

Get messages

GET /projects/:id/messages

Retrieve conversation history.

Parameter	Type	Default	Description
`limit`	integer	20	Messages per page. 1–50.
`after`	string		Message ID cursor. Returns messages newer than this ID.
`before`	string		Message ID cursor. Returns messages older than this ID.

Response `200`

{
  "messages": [
    {
      "id": "msg_001",
      "role": "user",
      "content": "Your brief here.",
      "source": "chat",
      "created_at": "2025-03-15T10:30:00Z"
    },
    {
      "id": "msg_002",
      "role": "assistant",
      "content": "I've created a 4-scene project ready for review...",
      "source": "chat",
      "created_at": "2025-03-15T10:32:00Z"
    }
  ],
  "has_more": false
}

Use the after cursor for efficient polling. Store the last message ID you’ve seen and pass it as ?after=msg_002 to get only new messages.

Overview

Resources

API Reference

Create a project

Request body

References

Response `202`

Example

Adopt a project

Request body

Response `201`

Response `200`

List projects

Response `200`

Get project status

Response `200`

Update project settings

Request body

Response `200`

Cancel a project

Response `200`

Send a message

Request body

Response `202`

Example

Get messages

Response `200`

Overview

Resources

API Reference

​Create a project

​Request body

​References

​Response 202

​Example

​Adopt a project

​Request body

​Response 201

​Response 200

​List projects

​Response 200

​Get project status

​Response 200

​Update project settings

​Request body

​Response 200

​Cancel a project

​Response 200

​Send a message

​Request body

​Response 202

​Example

​Get messages

​Response 200

Create a project

Request body

References

Response `202`

Example

Adopt a project

Request body

Response `201`

Response `200`

List projects

Response `200`

Get project status

Response `200`

Update project settings

Request body

Response `200`

Cancel a project

Response `200`

Send a message

Request body

Response `202`

Example

Get messages

Response `200`