# Create a static List

`POST /v1/lists`

- Authentication: required (Bearer token)
- Required scope: `api.lists.manage`

Creates a new managed static List definition. `key` is optional and
defaults to a slug derived from the name (matching the dashboard
create); it is the stable org-unique handle other calls reference the
List by, and is immutable afterwards. A key already in use returns
`409 conflict` — including a key owned by a git-backed List (the repo
owns that key). Definition-only: add members via the contacts surface.

## Request body

Content type: `application/json`

```json
{
  "name": "string",
  "key": "string",
  "description": "string"
}
```

## Example request

```bash
curl -X POST 'https://api.sendops.dev/v1/lists' \
  -H "Authorization: Bearer $SENDOPS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"name":"string","key":"string","description":"string"}'
```

## Responses

### 201 — The created List

Content type: `application/json`

```json
{
  "id": "00000000-0000-0000-0000-000000000000",
  "name": "string",
  "key": "string",
  "description": "string",
  "source": "api",
  "member_count": 0,
  "origin": "managed",
  "source_path": "string",
  "status": "active",
  "created_at": "2026-05-17T20:00:00Z",
  "updated_at": "2026-05-17T20:00:00Z"
}
```

### 401 — Missing, malformed, or unknown API key

Content type: `application/problem+json`

```json
{
  "type": "https://example.com",
  "title": "string",
  "status": 0,
  "detail": "string",
  "code": "invalid_key",
  "request_id": "string",
  "retry_after": 0,
  "retention_days": 0,
  "scope": "string",
  "resource": "string",
  "errors": [
    {
      "field": "string",
      "reason": "string"
    }
  ]
}
```

### 403 — Key lacks the required scope or plan limit violated

Content type: `application/problem+json`

```json
{
  "type": "https://example.com",
  "title": "string",
  "status": 0,
  "detail": "string",
  "code": "invalid_key",
  "request_id": "string",
  "retry_after": 0,
  "retention_days": 0,
  "scope": "string",
  "resource": "string",
  "errors": [
    {
      "field": "string",
      "reason": "string"
    }
  ]
}
```

### 409 — The mutation is rejected by a state rule rather than a bad request — e.g.
editing a git-backed (read-only) definition. The `code` is `conflict`.

Content type: `application/problem+json`

```json
{
  "type": "https://example.com",
  "title": "string",
  "status": 0,
  "detail": "string",
  "code": "invalid_key",
  "request_id": "string",
  "retry_after": 0,
  "retention_days": 0,
  "scope": "string",
  "resource": "string",
  "errors": [
    {
      "field": "string",
      "reason": "string"
    }
  ]
}
```

### 422 — Query parameter or path value failed validation

Content type: `application/problem+json`

```json
{
  "type": "https://example.com",
  "title": "string",
  "status": 0,
  "detail": "string",
  "code": "invalid_key",
  "request_id": "string",
  "retry_after": 0,
  "retention_days": 0,
  "scope": "string",
  "resource": "string",
  "errors": [
    {
      "field": "string",
      "reason": "string"
    }
  ]
}
```

### 429 — Per-org rate limit exceeded

Content type: `application/problem+json`

```json
{
  "type": "https://example.com",
  "title": "string",
  "status": 0,
  "detail": "string",
  "code": "invalid_key",
  "request_id": "string",
  "retry_after": 0,
  "retention_days": 0,
  "scope": "string",
  "resource": "string",
  "errors": [
    {
      "field": "string",
      "reason": "string"
    }
  ]
}
```

### 500 — Unexpected server-side failure. The `code` is `internal_error`. The
`request_id` field can be quoted to SendOps support to investigate.

Content type: `application/problem+json`

```json
{
  "type": "https://example.com",
  "title": "string",
  "status": 0,
  "detail": "string",
  "code": "invalid_key",
  "request_id": "string",
  "retry_after": 0,
  "retention_days": 0,
  "scope": "string",
  "resource": "string",
  "errors": [
    {
      "field": "string",
      "reason": "string"
    }
  ]
}
```