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Services APIs at the Library of Congress

Additional APIs and Data Services

In addition to the loc.gov API, there are several other APIs and machine-readable data services maintained by the Library of Congress separately from the loc.gov API and its associated microservice APIs.
  • Congress.gov API
    The Congress.gov Application Programming Interface (API) provides a method for Congress and the public to view, retrieve, and re-use machine-readable data from collections available on Congress.gov.
  • NLS BARD API
    An API for the BARD service of the National Library Service for the Blind and Print Disabled.
  • Chronicling America
    Datasets and API access to Chronicling America
  • PPOC - JSON HTTP API
    An API for the Prints and Photographs Online Catalog
  • Linked Data Service
    A Linked Data Service for Authority and Bibliographic Metadata
  • Search/Retrieval via URL
    Search/Retrieval via URL (SRU) servers, including the Z39.50 gateway to the Library catalog.