We answer questions about the services used for fetching and analyzing collections materials as data. This includes services such as the LoC.gov JSON/YAML API, LoC.gov Text Services microservice, LoC.gov Image Services (IIIF) and Streaming Services, Selected Datasets Collection, Web Archive datasets, By the People transcription data, and Data Packages on data.labs.loc.gov.

We hope to respond to your question within 5 business days. Note: Responses may be delayed due to high volume of inquiries.

This form is not intended for general questions about using the loc.gov website or online collections. For those questions, we encourage you to use the Library’s Ask a General Question form or one of the topic-specific specialist contact forms.

For general questions about web archives, please use the the Web Archiving Program contact form.

For questions about Congress.gov, please use the Congress.gov form.

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Related Resources

APIs at the Library of Congress
Documentation for the loc.gov APIs and sitemaps, as well as links to additional APIs and data services from Library of Congress
Digital Scholarship at the Library of Congress: A Research Guide
Newspaper Datasets and API Access
Bulk access to newspaper images and data
Selected Datasets Collection
A selection of datasets from the permanent collections of Library of Congress
Web Archive Datasets
Datasets from the Web Archiving Program