> ## Documentation Index > Fetch the complete documentation index at: https://algolia.com/llms.txt > Use this file to discover all available pages before exploring further. # List configuration versions > Lists previous versions of the specified crawler's configuration, including who authored the change. Every time you update a crawler's configuration, a new version is added. **Required ACL:** `settings` ## OpenAPI ````yaml specs/crawler.yml get /1/crawlers/{id}/config/versions openapi: 3.1.0 info: title: Crawler API summary: The Crawler API lets you manage and run your crawlers description: > ## Base URL The base URL for making requests to the Crawler API is: - `https://crawler.algolia.com/api` **All requests must use HTTPS.** ## Availability and authentication To authenticate your API requests, use the **basic authentication** header: - `Authorization: Basic ` Where `` is a base64-encoded string `:`. - ``. The Crawler user ID. - ``. The Crawler API key. You can find both on the [Crawler settings](https://dashboard.algolia.com/crawler/settings) page in the Algolia dashboard. The Crawler credentials are different from your regular Algolia credentials. ## Request format Request bodies must be JSON objects. ## Parameters Parameters are passed as query parameters for GET requests, and in the request body for POST and PATCH requests. Query parameters must be [URL-encoded](https://developer.mozilla.org/en-US/docs/Glossary/Percent-encoding). Non-ASCII characters must be UTF-8 encoded. ## Response status and errors The Crawler API returns JSON responses. Since JSON doesn't guarantee any specific ordering, don't rely on the order of attributes in the API response. Successful responses return a `2xx` status. Client errors return a `4xx` status. Server errors are indicated by a `5xx` status. Error responses have a `message` property with more information. ## Version The current version of the Crawler API is version 1, indicated by the `/1/` in each endpoint's URL. version: 1.0.0 servers: - url: https://crawler.algolia.com/api description: The URL of the Crawler API. security: - BasicAuth: [] tags: - name: actions x-displayName: State description: > Change the state of crawlers, such as pausing crawl schedules or testing the crawler with specific URLs. - name: config x-displayName: Configuration description: > In the Crawler configuration, you specify which URLs to crawl, when to crawl, how to extract records from the crawl, and where to index the extracted records. The configuration is versioned, so you can always restore a previous version. It's easiest to make configuration changes on the [Crawler page](https://dashboard.algolia.com/crawler) in the Algolia dashboard. The editor has autocomplete and built-in validation so you can try your configuration changes before committing them. - name: crawlers x-displayName: Manage description: | A crawler is an object with a name and a configuration. Use these endpoints to create, rename, and delete crawlers. - name: domains x-displayName: Domains description: List registered domains. - name: tasks x-displayName: Tasks description: Task operations. paths: /1/crawlers/{id}/config/versions: get: tags: - config summary: List configuration versions description: > Lists previous versions of the specified crawler's configuration, including who authored the change. Every time you update a crawler's configuration, a new version is added. operationId: listConfigVersions parameters: - $ref: '#/components/parameters/CrawlerIdParameter' - $ref: '#/components/parameters/ItemsPerPage' - $ref: '#/components/parameters/Page' responses: '200': description: OK content: application/json: schema: $ref: '#/components/schemas/crawlerConfigVersionsResponse' '404': description: Not found. components: parameters: CrawlerIdParameter: name: id in: path description: Crawler ID. required: true schema: $ref: '#/components/schemas/CrawlerID' ItemsPerPage: name: itemsPerPage in: query description: Number of items per page to retrieve. schema: $ref: '#/components/schemas/itemsPerPage' Page: name: page in: query description: Page to retrieve. schema: $ref: '#/components/schemas/page' schemas: crawlerConfigVersionsResponse: type: object properties: items: type: array description: Configuration changes. items: title: crawlerConfigVersionsResponse type: object properties: authorId: $ref: '#/components/schemas/authorId' createdAt: $ref: '#/components/schemas/createdAt' version: $ref: '#/components/schemas/version' required: - version - createdAt - authorId itemsPerPage: $ref: '#/components/schemas/itemsPerPage' page: $ref: '#/components/schemas/page' total: $ref: '#/components/schemas/total' description: Pagination information. CrawlerID: type: string description: Universally unique identifier (UUID) of the crawler. example: e0f6db8a-24f5-4092-83a4-1b2c6cb6d809 itemsPerPage: type: integer description: Number of items per page of the paginated API response. minimum: 1 maximum: 100 default: 20 page: type: integer description: Current page of the paginated API response. minimum: 1 maximum: 100 default: 1 authorId: type: string description: >- Universally unique identifier (UUID) of the user who created this version of the configuration. example: 7d79f0dd-2dab-4296-8098-957a1fdc0637 createdAt: type: string example: '2023-07-04T12:49:15Z' description: Date and time when the object was created, in RFC 3339 format. version: type: integer description: >- Version of the configuration. Version 1 is the initial configuration you used when creating the crawler. minimum: 1 total: type: integer description: Total number of retrievable items. example: 100 securitySchemes: BasicAuth: type: http scheme: basic ````