---
metadata:
  - name: generator
    content: Diplodoc Platform v5.64.0
alternate:
  - https://yandex.ru/dev/webmaster/doc/en/concepts/migration-4.0.md
  - https://yandex.ru/dev/webmaster/doc/ru/concepts/migration-4.0.md
  - href: https://yandex.ru/dev/webmaster/doc/en/concepts/migration-4.0.md
    type: text/markdown
    title: Markdown version
  - href: https://yandex.ru/dev/webmaster/doc/en/llms.txt?revision=r21838267
    rel: describedby
---
> **Documentation Index:** Fetch the complete configuration index at https://yandex.ru/dev/webmaster/doc/en/llms.txt?revision=r21838267

# Migration guide to version 4.0

This section contains information about how API version 4.0 differs from versions 3.0, 3.1, and 3.2.

## Added {#added}

The following resources were added:

#|
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**URI** | **GET** | **POST**
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`/user/{user-id}/hosts/{host-id}/recrawl/queue/`
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[Getting a list of tasks for reindexing](https://yandex.ru/dev/webmaster/doc/en/reference/host-recrawl-get.md)
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[Sending a page for reindexing](https://yandex.ru/dev/webmaster/doc/en/reference/host-recrawl-post.md)
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`/user/{user-id}/hosts/{host-id}/recrawl/quota/`
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[Checking the reindexing quota](https://yandex.ru/dev/webmaster/doc/en/reference/host-recrawl-quota-get.md)
|

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`/user/{user-id}/hosts/{host-id}/recrawl/queue/{task-id}/`
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[Checking the reindexing task status](https://yandex.ru/dev/webmaster/doc/en/reference/host-recrawl-task-get.md)
|

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`/user/{user-id}/hosts/{host-id}/diagnostics/`
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[Site diagnostics](https://yandex.ru/dev/webmaster/doc/en/reference/host-diagnostics-get.md)
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|#


## Changed {#edited}

- The `/user/{user-id}/hosts/{host-id}/indexing-history/` resource has been replaced with the following resources:
    
    #|
    ||
    **URI** | **GET**
    ||
    ||
    `/user/{user-id}/hosts/{host-id}/indexing/history/`
    |
    [Getting the site indexing history](https://yandex.ru/dev/webmaster/doc/en/reference/hosts-indexing-history.md)
    ||
    ||
    `/user/{user-id}/hosts/{host-id}/indexing/samples/`
    |
    [Viewing examples of downloaded pages](https://yandex.ru/dev/webmaster/doc/en/reference/hosts-indexing-samples.md)
    ||
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    `/user/{user-id}/hosts/{host-id}/search-urls/in-search/history/`
    |
    [Getting the history of changes in the number of pages in search](https://yandex.ru/dev/webmaster/doc/en/reference/hosts-indexing-insearch-history.md)
    ||
    ||
    `/user/{user-id}/hosts/{host-id}/search-urls/in-search/samples/`
    |
    [Viewing example pages in search](https://yandex.ru/dev/webmaster/doc/en/reference/hosts-indexing-insearch-samples.md)
    ||
    ||
    `/user/{user-id}/hosts/{host-id}/search-urls/events/history/`
    |
    [Getting the history of pages added to and removed from search results](https://yandex.ru/dev/webmaster/doc/en/reference/hosts-search-events-history.md)
    ||
    ||
    `/user/{user-id}/hosts/{host-id}/search-urls/events/samples/`
    |
    [Viewing examples of pages that appeared in search or were removed from search](https://yandex.ru/dev/webmaster/doc/en/reference/hosts-search-events-samples.md)
    ||
    |#
    
- The following parameters were removed from the `GET https://api.webmaster.yandex.net/v4/user/{user-id}/hosts/{host-id}/summary/` response:

    - `tic` — The site's TIC.
    
    - `downloaded_pages_count` — Number of pages loaded by the Yandex robot. To get the number of downloaded pages, use the [GET /user/{user-id}/hosts/{host-id}/indexing/history/](https://yandex.ru/dev/webmaster/doc/en/reference/hosts-indexing-history.md) method.
    

## Removed {#deleted}

The `/user/{user-id}/hosts/{host-id}/tic-history/` resource.