> ## Documentation Index > Fetch the complete documentation index at: https://docs.perceptlayer.com/llms.txt > Use this file to discover all available pages before exploring further. > ## Agent Instructions > Perceptlayer is a web data API: one key for structured JSON from about 250 websites. Base URL https://api.perceptlayer.com. > Send the key in the X-API-Key header. GET parameters go in the query string; POST parameters in a JSON body. > A successful call costs the credits on its endpoint (X-Credits-Used); failed calls cost nothing. Errors are {"error": {"code", "message", "request_id"}}. > AI agents can use every endpoint through the MCP server at https://api.perceptlayer.com/mcp (tools search_endpoints, get_endpoint, call_endpoint), with Authorization: Bearer . > Get a free key at https://perceptlayer.com/signup. # Google Scholar: Search > Search from Google Scholar. Costs 1 credit per successful call. 1 credit per successful call; failed calls are free. See the [Google Scholar API overview](https://perceptlayer.com/apis/google-scholar) for every Google Scholar endpoint. ## OpenAPI ````yaml /openapi.json get /v1/google-scholar/search openapi: 3.1.0 info: title: Perceptlayer API version: 1.0.0 description: >- One API key for structured web data. Each successful call costs the credits shown on its endpoint; failed calls are free. servers: - url: https://api.perceptlayer.com security: - ApiKeyAuth: [] tags: - name: 99acres - name: Agoda - name: Airbnb - name: AliExpress - name: Apartments.com - name: Apple App Store - name: Aramisauto - name: Arbeitsagentur Jobs - name: Argenprop - name: Autohero - name: AutoScout24 - name: AutoTempest - name: AutoTrack.nl - name: Autotrader - name: AutoTrader.ca - name: AutoTrader UK - name: AutoUncle - name: Autovit - name: Baidu - name: Bandcamp - name: Bayut - name: Behance - name: Bien'ici - name: Bilbasen - name: Bilibili - name: Billiger.de - name: Bing - name: Blocket Bil - name: Bluesky - name: Boliga - name: Booking.com - name: Booli - name: Brave Search - name: Bring a Trailer - name: Capterra - name: CarDekho - name: CarGurus - name: CarMax - name: Cars & Bids - name: Cars.com - name: Cars24 - name: Carsales - name: Carvana - name: Carwow - name: Casa.it - name: Centris - name: Coches.net - name: Copart - name: Craigslist - name: Crexi - name: Daft.ie - name: Dailymotion - name: DBA - name: Depop - name: DeviantArt - name: Dice - name: Domain Availability - name: Domain.com.au - name: Dribbble - name: Dubizzle - name: DuckDuckGo - name: eBay - name: Economy Car Rentals - name: Edmunds - name: Eventbrite - name: Expedia - name: Facebook - name: Facebook Ad Library - name: Fincaraiz - name: FINN - name: FINN Bil - name: Flickr - name: FlixBus - name: Fotocasa - name: Geizhals - name: Genius - name: GetYourGuide - name: GitHub - name: Glassdoor - name: Goodreads - name: Google Ads Transparency - name: Google Events - name: Google Finance - name: Google Flights - name: Google Forums - name: Google Hotels - name: Google Images - name: Google Jobs - name: Google Lens - name: Google Local - name: Google Local Services - name: Google Maps - name: Google News - name: Google Patents - name: Google Play - name: Google Related Questions - name: Google Scholar - name: Google Search - name: Google Shopping - name: Google Short Videos - name: Google Translate - name: Google Travel Explore - name: Google Trends - name: Google Videos - name: Gumtree - name: Habitaclia - name: Hacker News - name: Hemnet - name: heycar - name: HolidayCheck - name: Holidu - name: Homegate - name: HomeToGo - name: Hostelworld - name: HotPads - name: IAAI - name: Idealista - name: Idealo - name: Imgur - name: ImmobilienScout24 - name: ImmobilienScout24 Austria - name: ImmoScout24 Switzerland - name: Immoweb - name: Immowelt - name: Imovirtual - name: Impressum Extraction - name: Indeed - name: InfoJobs - name: Inmuebles24 - name: Instagram - name: Jameda - name: Kavak - name: Kayak Flights - name: Kayak - name: Kelley Blue Book - name: Kick - name: Kijiji - name: Kiwi.com - name: Kleinanzeigen - name: kununu - name: Kwai - name: La Centrale - name: Leboncoin Autos - name: Leboncoin Immo - name: Lemmy - name: Letterboxd - name: Link in Bio - name: LinkedIn - name: Linktree - name: LLM Answers - name: LoopNet - name: Madlan - name: MagicBricks - name: Marktplaats - name: Marktplaats Autos - name: Mastodon - name: Medium - name: Mercado Libre - name: Metrocuadrado - name: Milanuncios - name: Mixcloud - name: mobile.de - name: Motors.co.uk - name: MyAnimeList - name: Naukri - name: Naver - name: North Data - name: Odysee - name: OfferUp - name: Ohne-Makler - name: OLX Poland - name: Omio - name: OnTheMarket - name: Otodom - name: Otomoto - name: Patreon - name: Pinterest - name: Private Property - name: Product Hunt - name: Property Finder - name: realestate.com.au - name: Realtor.ca - name: Redfin - name: Reed - name: Rentalcars.com - name: Rentalia - name: Ricardo - name: Rightmove - name: Rumble - name: SEEK - name: SeLoger - name: Semrush - name: Similarweb - name: Skyscanner - name: Snapchat - name: SoundCloud - name: SpareRoom - name: Spotahome - name: Spotify - name: Sreality - name: Standvirtual - name: Startpage - name: Steam - name: StepStone - name: Subito - name: Subito Motori - name: Substack - name: SuperCasa - name: Telegram - name: Threads - name: TikTok - name: Trade Me Property - name: Trainline - name: Tripadvisor - name: Trivago - name: TrueCar - name: Trulia - name: Trusted Shops - name: Trustpilot - name: Truth Social - name: Tumblr - name: tutti.ch - name: Twitch - name: Viator - name: Vimeo - name: Vinted - name: VivaReal - name: VK - name: Vrbo - name: Wallapop - name: Walmart - name: Web Scraper - name: Weibo - name: Welcome to the Jungle - name: WG-Gesucht - name: willhaben - name: wlw - name: X (Twitter) - name: XING Jobs - name: Yad2 - name: Yaencontre - name: Yahoo Search - name: Yelp - name: YouTube - name: Zillow - name: Zonaprop - name: Zoopla - name: Zumper paths: /v1/google-scholar/search: get: tags: - Google Scholar summary: Search description: Search from Google Scholar. Costs 1 credit per successful call. operationId: google_scholar_search parameters: - name: q in: query required: false schema: type: string maxLength: 500 example: machine learning - name: hl in: query required: false schema: type: string example: en - name: start in: query required: false schema: type: integer - name: num in: query required: false schema: type: integer example: 10 - name: as_ylo in: query required: false schema: type: integer example: 2020 - name: as_yhi in: query required: false schema: type: integer - name: scisbd in: query required: false schema: type: integer enum: - '0' - '1' - '2' - name: cites in: query required: false schema: type: string - name: cluster in: query required: false schema: type: string responses: '200': description: Success headers: X-Request-Id: $ref: '#/components/headers/RequestId' X-Credits-Used: $ref: '#/components/headers/CreditsUsed' X-Credits-Remaining: $ref: '#/components/headers/CreditsRemaining' RateLimit-Limit: $ref: '#/components/headers/RateLimitLimit' RateLimit-Remaining: $ref: '#/components/headers/RateLimitRemaining' RateLimit-Reset: $ref: '#/components/headers/RateLimitReset' RateLimit-Policy: $ref: '#/components/headers/RateLimitPolicy' content: application/json: schema: type: object properties: endpoint: type: string params: type: object properties: q: type: string hl: type: string num: type: string as_ylo: type: string response: type: object properties: success: type: boolean data: type: object properties: search_parameters: type: object properties: engine: type: string q: type: string hl: type: string start: type: integer num: type: integer as_ylo: type: string scisbd: type: integer search_information: type: object properties: query_displayed: type: string total_results: type: integer result_stats: type: string organic_results: type: array items: type: object properties: position: type: integer title: type: string result_id: type: string link: type: string snippet: type: string publication_info: type: object properties: summary: type: string authors: type: array items: type: string resources: type: array items: type: object properties: file_format: type: string title: type: string link: type: string inline_links: type: object properties: cited_by: type: object properties: total: type: integer link: type: string cites_id: type: string related_articles_link: type: string pagination: type: object properties: current: type: integer start: type: integer num: type: integer next_start: type: integer has_next: type: boolean pages: type: array items: type: object properties: page: type: integer start: type: integer link: type: string meta: type: object properties: duration_ms: type: integer description: >- The fields of a recorded response. Other responses can carry more, or leave some out. example: endpoint: google-scholar.search params: q: machine learning hl: en num: '10' as_ylo: '2020' response: success: true data: search_parameters: engine: google_scholar q: machine learning hl: en start: 0 num: 10 as_ylo: '2020' scisbd: 0 search_information: query_displayed: machine learning total_results: 38300 result_stats: About 38,300 results (0.12 sec) organic_results: - position: 1 title: Machine learning result_id: WHD7vRZpYhIJ link: >- https://api.taylorfrancis.com/content/chapters/edit/download?identifierName=doi&identifierValue=10.1201/9780429171529-36&type=chapterpdf snippet: >- … learning algorithm can give sensible predictions on data that were not seen during training. This chapter provides an overview of the process by which m achine learning … learning over … publication_info: summary: >- S Marsland - Computing Handbook, 2022 - api.taylorfrancis.com authors: - … resources: - file_format: PDF - title: 14.139.161.31 file_format: PDF link: >- http://14.139.161.31/OldFiles/Machine_Learning_An_Algorithmic_Perspective_(2nd_ed).pdf - position: 2 title: Machine learning result_id: K_YKyl3arXoJ link: >- https://pubs.acs.org/infocus/book-supplement/2643/pdf/if-2023-x00006_toc/ snippet: >- Molecular Representations for Machine Learning … Molecular Representations for Machine Learning … 3.2 Simplicial Complexes 3.3 Persistent Homology 3.4 Capturing … publication_info: summary: >- M Jones, B Story, V Maroulas, KD Vogiatzis - 2023 - ACS Publications authors: - … - … - … inline_links: cited_by: total: 292 link: >- https://scholar.google.com/scholar?cites=8839961739954681387&as_sdt=2005&sciodt=0,5&hl=en cites_id: '8839961739954681387' related_articles_link: >- https://scholar.google.com/scholar?q=related:K_YKyl3arXoJ:scholar.google.com/&scioq=machine+learning&hl=en&as_sdt=0,5&as_ylo=2020 - position: 3 title: >- Machine learning in catalysis, from proposal to practicing result_id: NiObvdU8xJcJ link: >- https://pubs.acs.org/acsodf/article-abstract/5/1/83/873055 snippet: >- … One of the most powerful strategies within AI is machine learning (ML), which uses algorithms to … It is found that the automated machine-learning process has been assisting in building … publication_info: summary: >- W Yang, TT Fidelis, WH Sun - ACS omega, 2020 - ACS Publications authors: - … - … - … resources: - file_format: PDF - title: acs.org file_format: PDF link: >- https://pubs.acs.org/acsodf/article-pdf/5/1/83/68321629/acsomega.9b03673.pdf pagination: current: 1 start: 0 num: 10 next_start: 10 has_next: true pages: - page: 2 start: 10 link: >- https://scholar.google.com/scholar?start=10&q=machine+learning&hl=en&as_sdt=0,5&as_ylo=2020 - page: 3 start: 20 link: >- https://scholar.google.com/scholar?start=20&q=machine+learning&hl=en&as_sdt=0,5&as_ylo=2020 - page: 4 start: 30 link: >- https://scholar.google.com/scholar?start=30&q=machine+learning&hl=en&as_sdt=0,5&as_ylo=2020 meta: duration_ms: 3294 '401': $ref: '#/components/responses/Error' '402': $ref: '#/components/responses/Error' '403': $ref: '#/components/responses/Error' '404': $ref: '#/components/responses/Error' '410': $ref: '#/components/responses/Error' '422': $ref: '#/components/responses/Error' '429': $ref: '#/components/responses/Error' '502': $ref: '#/components/responses/Error' '503': $ref: '#/components/responses/Error' '504': $ref: '#/components/responses/Error' components: headers: RequestId: description: Unique ID for this request; quote it in support requests. schema: type: string CreditsUsed: description: Credits charged for this call (0 when it failed). schema: type: integer CreditsRemaining: description: Your balance after this call. schema: type: integer RateLimitLimit: description: >- Requests a minute your account may make: its rate in requests per second times 60. schema: type: integer RateLimitRemaining: description: Requests left in the current minute, shared by every key on the account. schema: type: integer RateLimitReset: description: Seconds until the current minute's count starts over. schema: type: integer RateLimitPolicy: description: The limit and its window in seconds, for example "300;w=60". schema: type: string responses: Error: description: Error content: application/json: schema: $ref: '#/components/schemas/Error' schemas: Error: type: object required: - error properties: error: type: object required: - code - message - request_id properties: code: type: string message: type: string request_id: type: string securitySchemes: ApiKeyAuth: type: apiKey in: header name: X-API-Key ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.