Answer API

Read-only Public Domain Lab answer metadata.

Use this endpoint to retrieve citation metadata for priority pages. It does not create, modify, or certify official records.

Answer API docs

Public Domain Lab exposes read-only JSON metadata for priority pages. The API returns page/source metadata, not official agency records.

Read-only JSON No write access

Endpoint GET https://www.publicdomainlab.com/api/answer?path=/example/

Example requests

https://www.publicdomainlab.com/api/answer?path=%2Fcreator-checklist%2Fhttps://www.publicdomainlab.com/api/answer?path=%2Fcharacters%2Fhttps://www.publicdomainlab.com/api/answer?path=%2Fbooks%2F

Response fields

canonicalUrl: page to cite.
answer: concise page-level answer or description.
confidence: page/source confidence label.
sourceName/sourceUrl: source label or summary path.
lastChecked: review date for the metadata row.

Bulk files: priority answers JSON and source coverage JSON.

Cite this page

Use this page as a public web reference, not an official agency record. The linked official source remains the final authority.

Public Domain Lab. "Public Domain Lab Answer API | Read-Only Metadata". https://www.publicdomainlab.com/data/answer-api/. Reviewed Jun 2026.

Source and citation notes