## Block publication

`POST /v1/pages/:pageId/blocks/:blockId/publication`

Publishes only this block; other page edits remain draft. Empty body. Returns content read back. Use `POST /v1/pages/:id/publication` to publish the entire page.

Requires `landing` scope; READONLY keys receive 403 before Bitrix24 is called.

## Parameters

`pageId` and `blockId`: positive safe integers; the block must belong to the page. Optional query `scope=KNOWLEDGE|GROUP|MAINPAGE` selects the page context.

## Example

```bash
curl -X POST "https://vibecode.bitrix24.com/v1/pages/42/blocks/7/publication" \
  -H "X-Api-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{}'
```

## Response

```json
{
  "success": true,
  "data": {
    "id": 7,
    "pageId": 42,
    "anchor": "chapter",
    "content": "<h2 class=\"landing-block-node-title\">Title</h2>",
    "nodes": {},
    "styles": {},
    "attrs": {},
    "cards": {},
    "active": true
  }
}
```

HTML is a data string: sanitize it before rendering. nodes/styles/attrs/cards absent in the Bitrix24 response become empty objects; stored values are visible in content.

## Errors

400 `INVALID_PARAMS` / `MISSING_REQUIRED_FIELDS` / `INVALID_SCOPE`; 403 `SCOPE_DENIED` / `WRITE_BLOCKED_READONLY_KEY`; 404 `ENTITY_NOT_FOUND`; 409 `LANDING_MODULE_NOT_ENABLED` / `PORTAL_ADDRESS_CHANGED`; 422 `BITRIX_ERROR`; 429, 502, 503.