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- Adds a new engine `searx/engines/openalex.py` that integrates the OpenAlex Works API to return scientific paper results using the `paper.html` template. - Uses the official API (no auth required); supports OpenAlex polite pool via `mailto`. - Adds developer docs at `docs/dev/engines/online/openalex.rst`. OpenAlex API reference: https://docs.openalex.org/how-to-use-the-api/api-overview
100 lines
3.3 KiB
ReStructuredText
100 lines
3.3 KiB
ReStructuredText
.. _openalex engine:
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=========
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OpenAlex
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=========
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Overview
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========
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The OpenAlex engine integrates the `OpenAlex`_ Works API to return scientific paper
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results using the :origin:`paper.html <searx/templates/simple/result_templates/paper.html>`
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template. It is an "online" JSON engine that uses the official public API and does
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not require an API key.
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.. _OpenAlex: https://openalex.org
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.. _OpenAlex API overview: https://docs.openalex.org/how-to-use-the-api/api-overview
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Key features
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------------
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- Uses the official Works endpoint (JSON)
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- Paging support via ``page`` and ``per-page``
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- Relevance sorting (``sort=relevance_score:desc``)
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- Language filter support (maps SearXNG language to ``filter=language:<iso2>``)
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- Maps fields commonly used in scholarly results: title, authors, abstract
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(reconstructed from inverted index), journal/venue, publisher, DOI, tags
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(concepts), PDF/HTML links, pages, volume, issue, published date, and a short
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citations comment
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- Supports OpenAlex "polite pool" by adding a ``mailto`` parameter
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Configuration
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=============
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Minimal example for :origin:`settings.yml <searx/settings.yml>`:
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.. code:: yaml
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- name: openalex
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engine: openalex
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shortcut: oa
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categories: science, scientific publications
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timeout: 5.0
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# Recommended by OpenAlex: join the polite pool with an email address
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mailto: "[email protected]"
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Notes
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-----
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- The ``mailto`` key is optional but recommended by OpenAlex for better service.
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- Language is inherited from the user's UI language; when it is not ``all``, the
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engine adds ``filter=language:<iso2>`` (e.g. ``language:fr``). If OpenAlex has
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few results for that language, you may see fewer items.
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- Results typically include a main link. When the primary landing page from
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OpenAlex is a DOI resolver, the engine will use that stable link. When an open
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access link is available, it is exposed via the ``PDF`` and/or ``HTML`` links
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in the result footer.
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What is returned
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================
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Each result uses the ``paper.html`` template and may include:
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- ``title`` and ``content`` (abstract; reconstructed from the inverted index)
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- ``authors`` (display names)
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- ``journal`` (host venue display name) and ``publisher``
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- ``doi`` (normalized to the plain DOI, without the ``https://doi.org/`` prefix)
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- ``tags`` (OpenAlex concepts display names)
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- ``pdf_url`` (Open access PDF if available) and ``html_url`` (landing page)
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- ``publishedDate`` (parsed from ``publication_date``)
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- ``pages``, ``volume``, ``number`` (issue)
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- ``type`` and a brief ``comments`` string with citation count
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Rate limits & polite pool
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=========================
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OpenAlex offers a free public API with generous daily limits. For extra courtesy
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and improved service quality, include a contact email in each request via
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``mailto``. You can set it directly in the engine configuration as shown above.
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See: `OpenAlex API overview`_.
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Troubleshooting
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===============
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- Few or no results in a non-English UI language:
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Ensure the selected language has sufficient coverage at OpenAlex, or set the
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UI language to English and retry.
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- Preference changes fail while testing locally:
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Make sure your ``server.secret_key`` and ``server.base_url`` are set in your
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instance settings so signed cookies work; see :ref:`settings server`.
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Implementation
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===============
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.. automodule:: searx.engines.openalex
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:members:
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