# Add a checklist item

`POST https://evohub.io/api/v1/board/cards/{cardID}/checklist`

Part of the [Board API](https://docs.evohub.io/board.md) reference · operationId `addChecklistItem`.

Adds an item to the card's checklist. `text` is required (at most 500
characters). A new item is never done; `done` is ignored here. Without
`placement` the item goes to the bottom.

Requires the `board:card:write` scope.

## Authorization

Any one of:

- `bearerKey`
- `headerKey`

Where:

- `bearerKey`: HTTP Bearer — An EvoHub API key (`evohub_…`) as a bearer token.
- `headerKey`: API key in the header `X-API-Key` — An EvoHub API key (`evohub_…`).

## Path parameters

- `cardID` (string, required, example `crd_9f2e4d6c8b0a1e3f5d7c9b1a3e5f7d90`): The card's ID.

## Request body (required)

Content type: `application/json`

Type: `ChecklistRequest`

- `text` (string, max length 500)
- `done` (boolean)
- `placement` (Placement)
  - `after` (string): The ID of the item it should follow. Empty means the top.
  - `before` (string): The ID of the item it should precede. Empty means the bottom.
  - `to` (string, one of `top`, `bottom`): An end of the list. Any other value is ignored.

## Responses

### 201 — The item was added.

Content type: `application/json`

Type: `object`

- `data` (object)
  - `item` (ChecklistItem)
    - `id` (string)
    - `card_id` (string)
    - `text` (string, max length 500)
    - `done` (boolean)
    - `created_by` (string)
    - `created_at` (string (date-time))
    - `updated_at` (string (date-time))

### 400 — The body is not JSON for this endpoint, or carries a field it does not know (`INVALID_BODY`), or a field breaks a rule (`VALIDATION_ERROR`; the message says which).

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required, example `NOT_FOUND`)
  - `message` (string, required, example `not found`)
  - `request_id` (string)

### 401 — No API key was sent, or it is unknown, revoked or expired (`UNAUTHORIZED`).

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required, example `NOT_FOUND`)
  - `message` (string, required, example `not found`)
  - `request_id` (string)

### 403 — The key lacks the scope this endpoint needs (`FORBIDDEN`).

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required, example `NOT_FOUND`)
  - `message` (string, required, example `not found`)
  - `request_id` (string)

### 404 — It does not exist, or it is on a board the caller cannot see (`NOT_FOUND`).

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required, example `NOT_FOUND`)
  - `message` (string, required, example `not found`)
  - `request_id` (string)

### 409 — The neighbours named in `placement` are no longer next to each other (`STALE_PLACEMENT`). Read the board again and retry.

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required, example `NOT_FOUND`)
  - `message` (string, required, example `not found`)
  - `request_id` (string)

### 429 — Too many requests (`RATE_LIMITED`). Wait for `Retry-After` seconds.

Headers:

- `Retry-After` (integer): Seconds to wait before retrying.

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required, example `NOT_FOUND`)
  - `message` (string, required, example `not found`)
  - `request_id` (string)

### 500 — Something went wrong on EvoHub's side (`INTERNAL_ERROR`). Retry later.

Content type: `application/json`

Type: `Error`

- `error` (object, required)
  - `code` (string, required, example `NOT_FOUND`)
  - `message` (string, required, example `not found`)
  - `request_id` (string)

## Example request

```bash
curl -X POST 'https://evohub.io/api/v1/board/cards/crd_9f2e4d6c8b0a1e3f5d7c9b1a3e5f7d90/checklist' \
  -H 'Content-Type: application/json' \
  -H 'Authorization: Bearer <TOKEN>' \
  -d '{
  "text": "Rotate on production"
}'
```